DTC table: V.A.G codes

WARNING: This page is about a different variant/trim than selected.

NOTE:

DTC tables are listed according to V.A.G code.
Explanation of DTC types (e.g. "open circuit/short circuit to ground" ): Scan Tool (ST) operating instructions
If DTCs are indicated:
Check wiring and connectors to these components as well as ground connections according to wiring diagram. This particularly applies if DTCs are displayed as "occurring sporadically" (SP).
Erase DTC memory after correcting DTC → Diagnostic Trouble Code (DTC) memory, checking and erasing and reset readiness code → Readiness code, setting .

V.A.G 1551 print out, e.g.:

00522 035

Engine Coolant Temperature (ECT) sensor G62

Signal too high

Sporadic DTC

Explanation:

00522 = DTC code
035 = DTC type as a number
Engine Coolant Temperature (ECT) sensor G62 = DTC current path or DTC location
Signal too high = DTC type as text

Sporadic DTCs = intermittent DTCs, e.g. loose contact

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00513
Engine Speed (RPM) Sensor G28
	Implausible signal	Engine Speed (RPM) Sensor G28 inoperative RPM sensor/sensor wheel gap too wide Metal chips on G28 or mount loose	Engine will not start Engine stalls Glow Plug Indicator Light K29 blinks No tachometer reading	Check Engine Speed (RPM) Sensor G28 → Engine speed sensor, checking
	No signal	Engine Speed (RPM) Sensor G28 inoperative Open or short circuit

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00519
Manifold Absolute Pressure (MAP) Sensor G71
	Short to positive (B+)	Manifold Absolute Pressure (MAP) Sensor G71 inoperative Short to positive (B+)	Reduced power	Check Manifold Absolute Pressure (MAP) Sensor G71 → Manifold Absolute Pressure (MAP) sensor and Barometric Pressure (BARO) sensor, checking
	Short to ground	Manifold Absolute Pressure (MAP) Sensor G71 inoperative Open or short to ground
	Voltage supply	Open or short circuit

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00522
Engine Coolant Temperature (ECT) Sensor G62
	Short to ground	Engine Coolant Temperature (ECT) Sensor G62 inoperative Short to ground	Black exhaust when starting Engine warm-up (pre-heating) not operating Glow period always approx. 20 sec.	Check Engine Coolant Temperature (ECT) Sensor G62 → Engine Coolant Temperature (ECT) sensor, checking
	Open circuit/ short to positive (B+)	Engine Coolant Temperature (ECT) Sensor G62 inoperative Open circuit or short to positive (B+)

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00527
Intake Air Temperature (IAT) Sensor G72
	Short to ground	Intake Air Temperature (IAT) Sensor G72 inoperative Short to ground	Indicates continuous 136.8 ° C (255 ° F) Engine pre-heating not operating	Check Intake Air Temperature (IAT) Sensor G72 → Intake Air Temperature (IAT) sensor, checking
	Open circuit/short to positive (B+)	Intake Air Temperature (IAT) Sensor G72 inoperative Open circuit or short to positive (B+)

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00532
Supply voltage
	Implausible signal	No voltage supply with "ignition on" (terminal 15)	Engine will not start Various running problems	Check voltage supply for Engine Control Module (ECM) → Engine control module voltage supply, checking
		Power supply (terminal 30, B+) relay J317 inoperative

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00539
Fuel Temperature Sensor G81
	Short to ground	Fuel Temperature Sensor G81 inoperative Short to ground	Increased emission values	Check Fuel Temperature Sensor G81 → Fuel temperature sensor, checking
	Open circuit/short to positive (B+)	Fuel Temperature Sensor G81 inoperative Open circuit or short to positive (B+)

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00542
Needle Lift Sensor G80
	Open circuit/short to positive (B+)	Needle Lift Sensor G80 inoperative Open circuit or short to positive (B+)	Glow Plug Indicator Light K29 blinks Engine runs rough Reduced power Increased emission value	Check Needle Lift Sensor G80 → Needle lift sensor, checking
	Short to ground	Needle Lift Sensor G80 inoperative Wiring has short to ground
	Implausible signal	Needle Lift Sensor G80 inoperative Injection system wiring to 3rd cylinder not OK. Fuel shortage Air in fuel system

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00550
Injection Start Control
	Control difference	Cold Start Injector N108 inoperative Needle Lift Sensor G80 inoperative Fuel tank empty Fuel supply malfunction Air in fuel system Start of delivery malfunction	Engine runs rough Reduced power Poor cold start characteristics Increased emission values	Check N108 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode Check Needle Lift Sensor G80 → Needle lift sensor, checking Fuel filter or fuel line plugged Check start of injection and adjust → Start of injection, dynamically checking and adjusting

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00553
Mass Air Flow (MAF) Sensor G70
	Implausible signal	Mass Air Flow (MAF) Sensor G70 malfunction	Reduced power Black exhaust smoke	Check Mass Air Flow (MAF) Sensor G70 → Mass Air Flow (MAF) sensor, checking
	Open circuit/short to ground	Mass Air Flow (MAF) Sensor G70 inoperative Open circuit or short to ground
	Short to positive (B+)	Mass Air Flow (MAF) Sensor G70 inoperative Open circuit or short to positive (B+)
	Voltage supply	Open or short circuit

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00575
Intake manifold pressure
	Control difference	Wastegate Bypass Regulator Valve N75 inoperative Hose connections interchanged, not connected	Reduced power	Check Wastegate Bypass Regulator Valve N75 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode Check Wastegate Bypass Regulator Valve N75 → 21 - TURBOCHARGER, G-CHARGER
00625
Speed signal
	Implausible signal	Instrument cluster inoperative No signal from Speedometer Vehicle Speed Sensor (VSS) G22	Electrical speedometer; no signal from speedometer G21 or G22 Cruise control off Vehicle jerks at shift point A/C is off	Check speed signal → Speed signal, testing

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00626
Glow Plug Indicator Lamp K29
	Open circuit/short to ground	Open circuit or short to ground Bulb inoperative	Glow plug indicator lamp inoperative	Check K29 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode
		Short to ground	Glow plug indicator lamp illuminated continuously
	Short to positive (B+)	Short to positive (B+)	Glow plug indicator lamp inoperative (not lit)

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00668
Voltage terminal 30
	Implausible signal	Power supply (terminal 30, B+) relay J317 inoperative Relay sticks (sporadically)	Engine will not start Various running problems	Check ECM voltage supply → Engine control module voltage supply, checking
00671
Cruise Control Switch E45
	Undefined switch position	Cruise Control Switch E45 inoperative Open/short circuit	Cruise control off	Check cruise control → Cruise Control System (CCS), checking

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00741
Brake pedal monitoring
	Implausible signal	Brake Light Switch F inoperative Cruise Control/Diesel Direct Fuel Injection (DFI) Brake Pedal Switch F47 inoperative	Glow Plug Indicator Light K29 blinks Brake light inoperative	Check Brake Light Switch F and Brake Pedal Switch F47 → Brake light switch and brake pedal switch, checking
00765
Modulating Piston Displacement Sensor G149
		Injection pump inoperative Open/short circuit	Glow Plug Indicator Light K29 blinks Various running problems Engine will not start	Check Modulating Piston Displacement Sensor G149 → Modulating piston displacement sensor G149 and Quantity adjuster N146 , checking

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
00777
Throttle Position (TP) Sensor G79
	Implausible signal	Throttle Position (TP) Sensor G79 inoperative	Glow Plug Indicator Light K29 blinks Increased idle speed	Check Throttle Position (TP) Sensor G79 → 20 - FUEL SUPPLY
	Short to positive (B+)	Throttle Position (TP) Sensor G79 inoperative Short to positive (B+)
	Voltage supply	Open or short circuit

DTC V.A.G 1551 display	Possible causes	Possible effects	Corrective action
01044
Control Module incorrectly coded (no display)
	Invalid Control Module code	Glow Plug Indicator Light K29 blinks	Code Control Module → Engine Control Module (ECM) J248 coding
01050
Glow plug monitoring (no display)
	Glow plug inoperative Different glow plugs installed	Glow plug system not operating Rough idle	Check glow plugs → Glow plug system, checking
	Glow Plug Relay J52 inoperative		Check Glow Plug Relay J52 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
01117
Load signal for Generator terminal DF
	Implausible signal	Generator (GEN) inoperative Voltage regulator inoperative Open circuit	Engine warm-up (pre-heat) inoperative	Check GEN: → Electrical Wiring Diagrams, Troubleshooting and Component Locations
01180
Engine a/c comp. off elec. conn.
	Short to positive (B+)	Short to positive (B+)	Reduced acceleration when a/c is on	Check a/c compressor intervention → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
01193
Pre Heating Coolant/Low Heat Output Relay J359
	Short to positive (B+)	Pre Heating Coolant/Low Heat Output Relay J359 inoperative Open circuit or short to positive (B+)	Engine preheat inoperative	Check Pre Heating Coolant/Low Heat Output Relay J359 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode
01194
Pre Heating Coolant/High Heat Output Relay J360
	Short to positive (B+)	Pre Heating Coolant/High Heat Output Relay J360 inoperative Open circuit or short to positive (B+)	Engine preheat inoperative	Check Pre Heating Coolant/High Heat Output Relay J360 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
01237
Fuel Cut-off Valve N109
	Mechanical malfunction	Fuel Cut-off Valve N109 inoperative, leaking or sticking	Reduced output Engine will not start	Check Fuel Cut-off Valve N109 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode
	Open circuit/short to ground	Fuel Cut-off Valve N109 inoperative Open circuit/short to ground

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
01262
Wastegate By-pass Regulator Valve N75
	Open circuit/short to ground	Wastegate By-pass Regulator Valve N75 inoperative Open circuit	Reduced output Charge pressure too low	Check Wastegate By-pass Regulator Valve N75 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode
		Short to ground	Reduced output Charge pressure too high
	Short to positive (B+)	Short to positive (B+)	Reduced output Charge pressure too low

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
01265
EGR Vacuum Regulator Solenoid Valve N18
	Open circuit/short to ground	EGR Vacuum Regulator Solenoid Valve N18 inoperative Open circuit	No EGR Vacuum Regulator Solenoid Valve N18	Check EGR Vacuum Regulator Solenoid Valve N18 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode
		Short to ground	Too much EGR Reduced output, black smoke
	Short to positive (B+)	Short to positive (B+)	No EGR

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
01266
Glow plug relay J52
	Open circuit/short to ground	Glow plug relay J52 inoperative Open circuit	Glow plug system inoperative	Check Glow plug relay J52 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode
		Short to ground	Glow plug system on continuously
	Short to positive (B+)	Short to positive (B+)	Glow plug system inoperative

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
01268
Quantity adjuster N146
	Control difference	Injection pump inoperative Open/short circuit	Glow Plug Indicator Light K29 blinks Various running problems Engine will not start	Check Quantity adjuster N146 → Modulating piston displacement sensor G149 and Quantity adjuster N146 , checking
	Lower limit value	Quantity adjuster incorrectly set Quantity adjuster dirty	Black smoke Rough idle
	Upper limit value	Quantity adjuster incorrectly set Quantity adjuster dirty	Jerking, poor performance

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
01269
Cold Start Injector N108
	Open circuit/short to ground	Cold Start Injector N108 inoperative Open circuit	Engine knocks at idle, because Cold Start Injector N108 is constantly "advanced"	Check Cold Start Injector N108 → Output Diagnostic Test Mode, performing , Output Diagnostic Test Mode
		Short to ground	Poor performance, Cold Start Injector N108 continuously "retarded"
	Short to positive (B+)	Short to positive (B+)	Engine knocks at idle, Cold Start Injector N108 is continuously "advanced"

DTC V.A.G 1551 display		Possible causes	Possible effects	Corrective action
01282
Change-over valve for Intake manifold flap N239
	Open circuit/short to ground	Change-over valve for Intake manifold flap N239 inoperative Wiring open circuit or short to ground	Abrupt engine stop	Check Change-over valve for Intake manifold flap N239 → Intake manifold flap change-over valve, checking
	Short to positive (B+)	Short to positive (B+)