V.VAG codes

Code information

Possible cause of fault:

Possible problems:

Solution:

00513

Engine speed sender -G28- 
This fault message is stored if the sequence of pulses from the engine speed sender changes more rapidly than would be possible as a result of a change in engine speed. 

Sender rotor on flywheel or sender pins on torque converter plate are damaged 

Glow period warning lamp flashes .   Loss of power (torque reduction) 

Check sender rotor 

00519

Intake manifold pressure sender -G71-Voltage supply 

 This fault message is stored if the voltage supply to the intake manifold pressure sender is less than 4.92 V or greater than 5.03 V. 

Open circuit or short to positive in wiring  

-G71- defective 

Loss of power 

Check intake manifold pressure sender 

00522

Coolant temperature sender

-G62-      

Short to earth

This fault message is stored if the voltage of the signal from the coolant temperature sender is less than 0.2 V.

-G62- defective

Short to earth in wiring

Black exhaust smoke when starting

Glow period always approx. 20 seconds

Check coolant temperature sender

00523

Intake air temperature sender -G42-      

Short to earth

This fault message is stored if the voltage of the signal from the intake air temperature sender is less than 0.12 V.

-G42- defective Short to earth in wiring

Fixed substitute value

Check intake air temperature sender

00532

Voltage supply Signal too low

 This fault message is stored if the voltage supply at the engine control unit is less than 9 V for a period of 60 seconds

Battery discharged

Faulty wiring connection to engine control unit

Engine will not start

Engine running problems, possibly including engine cut-out

Check battery voltage

Check voltage supply for diesel direct injection system

00532

Voltage supply  short to positive

 This fault message is stored if the engine control unit has completed its self-test (sustained voltage phase) but the voltage supply has not been disconnected. (When the ignition is switched off the engine control unit continues to receive voltage for between 4 and 10 minutes. This is the self-test phase.)

Diesel direct injection system relay defective (contacts sticking)

Short to positive in wiring

Battery discharges

Check battery voltage

Check voltage supply for diesel direct injection system

00534

Oil temperature sender -G8-short to earth

 This fault message is stored if the voltage of the signal from the oil temperature sender is less than 0.2 V.

-G8- defective

Short to earth in

wiring

Fixed substitute value

Reduced power output (engine protection)

Rectify open circuit or short circuit

00539

Fuel temperature sender -G81- signal outside tolerance

This fault message is stored if the temperature of the fuel in the injection pump is greater than 100 °C.

Full throttle at extremely high outside temperature

Blocked fuel filter or pipes

Reduced power output (engine protection)

Allow vehicle to cool down

Check fuel system

00542

Needle lift sender -G80   Short to earth

This fault message is stored if the voltage of the signal from the needle lift sender is less than 0.03 V. 

G80- defective

Open circuit or short circuit

Glow period warning lamp flashes

Check needle lift sender 

00542

Open circuit/short to positive

 This fault message is stored if the voltage of the signal from the needle lift sender is greater than 2.12 V.

-G80- defective

Open circuit or short circuit

Glow period warning lamp flashes

Check needle lift sender

00546

CAN Data wiring defective       
 This fault message is stored if interference occurs in the transmission of data between the engine control unit

 and the injection pump via the data wire, but transmission is not interrupted  

Data wire to injection pump defective

Short in CAN bus

Engine will not start

Engine running problems, possibly including engine cut-out

Engine will not start

Engine running problems, possibly including engine cut-out

00550

Injection commencement (beginning) regulation control difference

This fault message is stored if the actual crankshaft angle at the start of delivery differs from the specified angle by more than 3°. The specification is transmitted by the engine control unit to the injection pump. The comparison between specification and actual value is carried out in the injection pump. 

Tank filled with petrol or biodiesel

Water in fuel

 Air in fuel system

Start of delivery not OK.

Loss of power at high engine speeds

Engine will not start easily

 Gearbox in emergency running mode

Check tank for petrol or biodiesel; if this is the case: drain tank and fill with diesel, erase fault memory and perform road test, then interrogate fault memory again

Check fuel supply and return lines for blockage or kinks

00550

Injection commencement regulation regulating limit not reached regulating limit exceeded  

This fault message is stored if the actual crankshaft angle at the start of delivery differs from the specified angle by more than 3°. The specification is transmitted by the engine control unit to the injection pump. The comparison between specification and actual value is carried out in the injection pump. 

Start of delivery not OK.

Needle lift sender -G80- defective

Loss of power at high engine speeds

Gearbox in emergency running mode

 Jolting of engine

Check and adjust commencement of injection

Check needle lift sender

00550

Injection commencement regulation implausible signal

This fault message is stored if the injection timing control in the injection pump “jumps” 

Tank filled with petrol or biodiesel

Fuel filter blocked

Fuel lines kinked or clogged

 Air in fuel system

Loss of power at high engine speeds 
Loud combustion noise 
Rattling noises in pump (injection timing control) 
Starting problems when engine is cold 

Check tank for petrol or biodiesel; if this is the case: drain tank and fill with diesel, erase fault memory and perform road test, then interrogate fault memory again

Check fuel supply and return lines for blockage or kinks

00553

Air mass meter -G70- implausible signal

This fault message is stored if the intake air mass is less than 190 mg/stroke or greater than 1300 mg/stroke at an engine speed above 1300 rpm 

Air cleaner blocked 
Vacuum hose system for exhaust gas recirculation incorrectly connected, or mechanical exhaust gas recirculation valve constantly open 

Rough idling, loss of power

Fixed substitute value

Check intake system

Check vacuum hoses 

00553

Air mass meter -G70-Short to positive

This fault message is stored if the voltage of the signal from the air mass meter is greater than 4.8 V 

Open circuit or short to positive in wiring

-G70- defective

Reduced power

Fixed substitute value

Check air mass meter

00560

Exhaust gas recirculation, control difference      
  Regulating limit not reached This fault message is stored if the intake air mass is a certain amount less than specified air mass for approx. 10 seconds 

Exhaust gas recirculation valve -N18- defective

Hoses wrongly connected, blocked or leaking

Mechanical EGR valve defective

Reduced power

Black exhaust smoke

Check exhaust gas recirculation system

00560

Exhaust gas recirculation, control difference regulating limit exceeded

 This fault message is stored if the intake air mass exceeds the specified air mass by a certain amount for approx. 10 seconds 

Exhaust gas recirculation valve -N18- defective

Hoses not connected, wrongly connected, blocked or leaking

Check exhaust gas recirculation system

00575

Intake manifold pressure regulating limit not reached

This fault message is stored if the measured charge pressure is 800 mbar lower than the specified value for about 8 seconds above a certain engine speed and injection quantity. 

Hoses not connected, wrongly connected, blocked or leaking

Turbocharger defective

Charge pressure too low

Reduced power

Check charge pressure

00575

Intake manifold pressure regulating limit exceeded

This fault message is stored if the measured charge pressure is 200 mbar higher than the specified value for about 5 seconds above a certain engine speed and injection quantity. 

Charge pressure control solenoid valve -N75- defective

Turbocharger defective (charge pressure control mechanism sticking)

Charge pressure too high

Sudden loss of power

Reduced power

Check charge pressure

00625

Speed signal implausible signal

This fault message is stored if, for a period of about 10 seconds, the engine speed is greater than 2800 rpm, the injection quantity is greater than 22 mg/stroke and the measured road speed is less than 5 km/h. 

Open circuit between speedometer sender -G22 and dash panel insert
-G22- defective
Speedometer -G21- defective
Open circuit between dash panel insert and engine control unit

Cruise control system not working

Air conditioner not working

Load change shocks

Check vehicle speed signal   Check speedometer sender

00625

Speed signal too high

This fault message is stored if the measured road speed is greater than 290 km/h. 

Signal interference

 -G22- defective

Cruise control system not working
Load change shocks

Check vehicle speed signal   Check speedometer sender 

00626

Glow period warning lamp -K29-Open circuit/short to earth

This fault message is stored if the engine control unit fails to activate the glow period warning lamp and there is no voltage at the control unit input. 

Open circuit in wiring

Bulb defective

Glow period warning lamp not working

Check glow period warning lamp

00626

Glow period warning lamp -K29- output does not sw./ short to pos.

This fault message is stored if the engine control unit is activating the glow period warning lamp and too much current is flowing at the control unit input 

Short to positive

Glow period warning lamp not working

Check glow period warning lamp

00628

Control element setting monitoring implausible signal

This fault message is stored if the engine control unit has sent a cut-out signal to the injection pump,

the injection pump confirms receipt, but the engine keeps running 

Injection pump defective

Engine stops (safety cut-out)

Read measured value block 18, display zone 3:

    if 00100000 is displayed, check cut-out signal . 
    If 00000000 is displayed, erase fault memory, start engine and interrogate fault memory again. 
    If the cut-out signal (wiring connection) is okay and the fault code is stored again, renew injection pump 

00628

Control element setting monitoring Open circuit/short to earth

This fault message is stored if the engine control unit has sent a cut-out signal to the injection pump but the injection pump has not received it 

Open circuit or short to earth in wiring

Engine cuts out (safety cut-out via data wire)

Check cut-out signal

00667 

Outside temperature signal implausible signal

 This fault message is stored, if the engine control unit does not receive an outside temperature signal 

Open circuit in wiring

Check outside temperature signal

00668

Vehicle voltage terminal 30  Voltage supply too low

This fault message is stored if the voltage supply to the injection pump is less than 6 V or greater than 24 V. 

Voltage supply to injection pump too low (battery discharged)

Poor wiring connection to injection pump

Engine will not start

Engine running problems, possibly including engine cut-out

Check battery voltage

Check voltage supply for diesel direct injection system

00671

CCS switch -E45-Undefined switch position

E45 defective

Open circuit or short circuit in wiring

Cruise control system switched off

Check cruise control system

00741

Brake pedal monitoring implausible signal

 This fault message is stored if the brake light switch signals “brake pedal pressed” but the brake pedal switch does not detect a pressed brake pedal, or vice versa 

Both brake lights defective

Fuse defective

Switch incorrectly set

Open circuit in wiring

Brake light switch -F or brake pedal switch -F47- defective

No throttle response at times, complete loss of power

Glow period warning lamp flashes

Check brake light

Check fuse

Check brake light switch -F and brake pedal switch -F47-   Adjust brake light switch 

00777

Accelerator pedal position sender -G79- implausible signal

This fault message is stored if the idling speed switch indicates that the engine is idling but the potentiometer indicates that the accelerator is depressed (or vice versa) 

Open circuit in wiring

-G79- defective

Increased idling speed

No throttle response

Check accelerator position sender

00777

Accelerator pedal position sender -G79-  voltage supply

 This fault message is stored if the voltage supply to the accelerator position sender is less than 4.76 V or greater than 5.2 V 

Open circuit or short circuit in wiring

-G79- defective

Increased idling speed

No throttle response

Check accelerator position sender

01028

Blower relay -J323- open circuit/short to earth

 This fault message is stored if the engine control unit fails to activate the radiator fan run-on control unit -J138 and there is no voltage at the control unit input.

Open circuit in wiring

Relay defective

No radiator fan run-on

Rectify open circuit or short circuit

01028

Blower relay -J323- output does not sw./ short to pos.

 This fault message is stored if the engine control unit activates the radiator fan run-on control unit -J138 and too much current is flowing at the control unit input

Short to positive

No radiator fan run-on

Rectify open circuit or short circuit

01044

Control unit incorrectly coded      
This fault message is stored if the engine control unit has an invalid coding 

Invalid control unit coding

Glow period warning lamp flashes

Code control unit

01117

Load signal for alternator terminal DF  implausible signal

This fault message is stored if the load on the alternator remains at 0% for 10 minutes.

Open circuit in wiring

Rectify open circuit or short circuit

01126

Engine speed signal  signal outside tolerance

This fault message is stored if the impulses from the engine speed sender are not received by the injection pump within a specified period. 

Start of delivery from injection pump incorrect

Open circuit in wiring

Engine will not start

Engine cuts out

Check commencement of injection   Check engine speed signal

01180

Engine / AC compressor cut-off: electrical connection short to positive

 This fault message is stored if there is too much current along the wiring from the air conditioner operating and display unit. 

Short circuit in wiring

Slower acceleration when air conditioner is on

Check AC compressor signal and AC compressor shut-off

01259

Fuel pump relay -J17- open circuit/short to earth

 This fault message is stored if the engine control unit fails to activate the fuel pump relay and there is no voltage at the control unit input. 

Open circuit in wiring

Check fuel pump relay

01259

Fuel pump relay -J17- output does not sw./ short to pos.

This fault message is stored if the engine control unit activates the fuel pump relay and too much current is flowing at the control unit input. 

Short to positive

Misfiring

Engine cuts out

Check fuel pump relay

01262

Charge pressure control solenoid valve -N75- open circuit/short to earth

 This fault message is stored if the engine control unit fails to activate the solenoid valve for boost pressure (charge pressure) control and there is no voltage at the control unit input. 

Open circuit in wiring

Solenoid valve defective

Reduced power

Charge pressure too low

Check solenoid valve for charge pressure control

01265

Exhaust gas recirculation valve -N18- open circuit/short to earth

This fault message is stored if the engine control unit does not activate the exhaust gas recirculation valve and there is no voltage at the control unit input.

Open circuit in wiring

Solenoid valve defective

No exhaust gas recirculation

Check exhaust gas recirculation valve

01266

Glow plug relay -J52  Open circuit/short to earth

This fault message is stored if the engine control unit fails to activate the glow plug relay and there is no voltage at the control unit input. 

Open circuit in wiring

Relay defective

Glow plug system not working

Rectify open circuit or short circuit

01268

Metering adjuster -N146- Defective

 This fault message is stored if the metering solenoid valve or the activation (in the injection pump) is defective 

Metering adjuster defective

Voltage supply to injection pump too low

Fault entry relating to the CAN bus

Sporadic short circuit in wiring harness

Reduced power output (engine protection)

Engine stops (safety cut-out)

Test sequence if engine does start:

Read measured value block 18, check that voltage in display zone 1 is at least 11 Volt and the value of all bits in display zone 3 must be 0. If both readings are as specified, erase fault memory and perform road test, then interrogate fault memory again.

01268

Metering adjuster -N146- 

Check data wiring between engine control unit and injection pump  
First interrogate all control units capable of CAN communication and eliminate all faults indicated 

 Detach connector from injection pump and check pins for corrosion and correct seating. Re-attach connector and erase fault memory, then interrogate fault memory again. 
If the fault is entered again, renew injection pump

01282

Variable intake manifold flap change-over valve -N239-Open circuit/short to earth

This fault message is stored if the engine control unit does not activate the changeover valve and there is no voltage at the control unit input 

Open circuit in wiring

Change-over valve defective

Check intake manifold flap changeover valve

01318

Injection pump control unit -J399- Defective

 This fault message is stored if the injection pump has detected a fault during the self-test. (The injection pump control unit is part of the injection pump.) 

Injection pump defective

Reduced power output (engine protection)

Fault 01126 Engine speed signal must not be stored (if it is stored, check signal using oscilloscope function)

–   Renew injection pump 

01318

Injection pump control unit -J399-  No communication

This fault message is stored if signal transmission along the data wiring between the engine control unit and the injection pump is interrupted. 

Open circuit in data wire to injection pump

Engine will not start

Engine cuts out

Erase fault memory after performing compression test.

First interrogate all control units capable of CAN communication and eliminate all faults indicated

Read measured value block 18, check that voltage in display zone 1 is at least 10.5 Volt, charge battery if necessary, then erase fault memory and interrogate fault memory again.

Detach connector from injection pump and check pins for corrosion and correct seating. Re-attach connector and erase fault memory, then interrogate fault memory again.

Check CAN matching resistor in injection pump

Check data wiring between engine control unit and injection pump

Check production date of engine control unit if fault code “1318 - No communication” is stored in addition to fault code “00546”.

Due to an incorrect resistance value in the engine control unit, the engine will jolt or cut-out if the ambient temperature or sunlight intensity is very high. After parking the vehicle for approx. 1 hour in the shade, the faults can be erased and the engine will start.

Check whether the production date is between 14.04.01 and 12.07.01 (the production date can be found on the sticker on the engine control unit). Renew the engine control unit if it was produced during this period and the faults listed above are stored.

01375

Engine mounting valves stage 1 Open circuit/short to earth

 This fault message is stored if the engine control unit fails to activate the engine mounting valves and there is no voltage at the control unit input. 

Open circuit in wiring

Engine mounting -N144- or -N145 defective

Electro-hydraulic engine mountings permanently hard

Rectify open circuit or short circuit

01376

Rev signal for injection pump Defective

This fault message is stored if the speed sender in the injection pump is transmitting false signals or no signal at all. 

Injection pump defective

Engine stops (safety cut-out)

Renew injection pump

01440

Fuel level signal  Open circuit/short to positive

 This fault message is stored if there is an open circuit or short to battery positive in the wiring to the instrument cluster. 

Open circuit or short to positive in wiring

Glow period warning lamp flashes

Check fuel level signal

01441

Low fuel level sender -G210-Open circuit/short to positive

This fault message is stored if the voltage of the signal from the sender for low fuel level is greater than 2.65 V. 

Open circuit or short to positive in wiring

-G210- defective

Glow period warning lamp flashes

Check low level fuel sender

01441

Low fuel level sender -G210- Implausible signal

This fault message is stored if the sender for low fuel level indicates “no fuel” but the fuel level signal in the dash panel insert does not indicate that the tank needs filling.

Baffle housing is not filled with fuel even though there is sufficient fuel in tank

Glow period warning lamp flashes

Engine cuts out due to air in fuel system

Check fuel pump

Check that baffle housing is

Bleed fuel system 

01442

Misfiring due to lack of fuel

 This fault message is stored if the baffle housing in the tank is empty 
Vehicle has been driven until tank is empty 

Vehicle has been driven until tank is empty
Baffle housing is not filled with fuel even though there is sufficient fuel in tank

Fault “01441 Implausible signal” certainly not stored

Misfiring

Engine cuts out because vehicle has been driven until tank is empty

Fault “01441 Implausible signal” stored

Engine cuts out due to air in fuel system

Put fuel in fuel tank
Check fuel pump

Check that baffle housing is filled   Bleed fuel system 

01613

Fuel cooling pump relay Output does not sw./ short to pos.

This fault message is stored if the engine control unit is activating the fuel cooling pump relay and too much current is flowing at the control unit input. 

Short to positive

Reduced power output

Check wiring

01686

Radiator fan run-on control unit -J138- Open circuit/short to earth

The fault message is stored if the engine control unit does not activate the radiator fan run-on control unit and there is no voltage at the control unit input

Open circuit in wiring

Relay defective

No radiator fan run-on

Rectify open circuit or short circuit

01695

Fuel temperature sender 2 -G248- Short to earth

This fault message is stored if the voltage of the signal from the sender 2 for fuel temperature is less than 4.1 V. 

Short to earth 
Fuel temperature sender 2 defective

No noticeable effects 

Check wiring 

17583 P1175

Pilot injection shut off

This fault message is stored if the pilot injection is shut off due to implausible values 

Tank filled with petrol or biodiesel

Water in fuel

Fuel pressure too low

Fuel return pipe damaged

Internal mechanical fault in injection pump

Loud engine noise

Check tank for petrol or biodiesel; if this is the case: drain tank and fill with diesel, erase fault memory and perform road test, then interrogate fault memory again

Drain fuel filter   Check fuel return pipe for blockage or kinks

17931 P1523

Crash signal from airbag CU

This fault message is stored if the wiring to the airbag control unit is defective 

Open circuit or short circuit in wiring

Check crash signal  perform final control diagnosis in airbag CU

Check wiring

17978 P1570

Engine control unit blocked

This fault message is stored if the ignition was switched on but the engine control unit did not receive a starting signal from the immobilizer. 

Attempted tampering

Immobilizer not adapted

Immobilizer defective

Engine starts but cuts out again immediately

Check electronic immobilizer

18017 P1609

Crash deactivation triggered

This fault message is stored if the engine control unit is notified by the airbag control unit that the airbag has triggered. 

Final control diagnosis in airbag CU performed

Accident involving airbag activation

Engine cuts out

Erase fault memory

18033 P1625

Drive train data bus Implausible message from gearbox CU

 This fault message is stored if there is interference in the transmission of data between the engine control unit and the gearbox control unit via the data wire. 

Open circuit in wiring to gearbox control unit

Gearbox in emergency running mode

Check wiring

18034 P1626

Drive train data bus No message from gearbox CU

This fault message is stored if there is interference in the transmission of data between the engine control unit and the gearbox control unit via the data wire. 

Open circuit in wiring to gearbox control unit

Gearbox in emergency running mode

Check CAN bus

18044 P1636

Drive train data bus No message from airbag CU

This fault message is stored if interference occurs in the transmission of data between the engine control unit and the airbag control unit via the data wire.

Open circuit in wiring to airbag control unit

Check CAN bus

18056 P1648

Drive train data bus Hardware defective

 This fault message is stored if the information exchange between all control units via CAN bus is no longer possible. 

Open circuit in wiring or short to earth or positive

Engine running problems

Check CAN bus

18057 P1649 

Drive train data bus No message from ABS CU

This fault message is stored if interference occurs in the transmission of data between the engine control unit and the ABS control unit via the data wire.

Open circuit in wiring to ABS control unit

Traction control (ASR) warning lamp lights up

ASR not working

Check CAN bus

18058 P1650 

Drive train data bus No message from dash panel insert

This fault message is stored if interference occurs in the transmission of data between the engine control unit and the dash panel insert via the data wire.

Open circuit in wiring to dash panel insert

Check adaption for drive train data bus in dash panel insert.
Check CAN bus

18062 P1654

Interrogate fault memory of combi-instrument       

Fault in instrument cluster (dash panel insert)

Determine cause of fault in instrument cluster and eliminate

18259 P1851

Drive train data bus   No message from ABS CU

This fault message is stored if interference occurs in the transmission of data between the engine control unit and the ABS control unit via the data wire. 

Open circuit in wiring to ABS control unit

Traction control (ASR) warning lamp lights up

ASR not working

Check wiring

65535

Control unit defective

Internal fault in control unit

Engine running problems

Engine cuts out

Renew engine control unit