DTCs P0101 to P0638, VAG 16485 to 17022

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Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0101	16485	Mass Air Flow (MAF) sensor G70 implausible signal	Check Mass Air Flow (MAF) sensor → Mass Air Flow (MAF) Sensor G70 , checking .
P0102	16486	Mass or Volume Air Flow Circ Low Input	Check intake air system for leaks (unmetered air) → Intake air system, checking for leaks (unmetered air) Check fuse 43.
P0103	16487	Mass or Volume Air Flow Circ High Input
P0112	16496	Intake Air Temp. Circ Low Input	Check Intake Air Temperature (IAT) sensor → Intake air temperature sensor G42 , checking .
P0113	16497	Intake Air Temp.Circ. High Input
P0116	16500	Engine Coolant Temp. Circ Range/Performance	Check Engine Coolant Temperature (ECT) sensor → Engine Coolant Temperature (ECT) sensor, checking .
P0117	16501	Engine Coolant Temp. Circ Low Input	Check thermostat. → 19 - ENGINE - COOLING SYSTEM 2.8
P0118	16502	Engine Coolant Temp. Circ. High Input
P0130	16514	02 Sensor Circ., Bank 1-Sensor 1 Malfunction	Check oxygen sensor heating before Three Way Catalytic Converter (TWC) → Heated Oxygen Sensor (HO2S) G39 , checking .

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0131	16515	02 Sensor Circ., Bank 1-Sensor 1 Low Voltage	Check oxygen sensor and control before Three Way Catalytic Converter (TWC) → Oxygen sensor and oxygen sensor control before Three Way Catalytic Converter (TWC), checking .
P0132	16516	02 Sensor Circ., Bank1-Sensor1 High Voltage	Check oxygen sensor 1 aging → Oxygen sensor 1 aging, checking .
P0133	16517	02 Sensor Circ., Bank1-Sensor1 Slow Response	Check oxygen sensor and control after Three Way Catalytic Converter (TWC) → Oxygen sensor and oxygen sensor control after Three Way Catalytic Converter (TWC), checking .
P0134	16518	02 Sensor Circ., Bank1-Sensor1 No Activity Detected	Check oxygen sensor and control before Three Way Catalytic Converter (TWC) → Oxygen sensor and oxygen sensor control before Three Way Catalytic Converter (TWC), checking .
P0136	16520	02 Sensor Circ., Bank 1-Sensor 2 Malfunction	Check oxygen sensor and control after Three Way Catalytic Converter (TWC) → Oxygen sensor and oxygen sensor control after Three Way Catalytic Converter (TWC), checking .
P0137	16521	02 Sensor Circ., Bank 1-Sensor 2 Low Voltage	Check oxygen sensor and control after Three Way Catalytic Converter (TWC) → Oxygen sensor and oxygen sensor control after Three Way Catalytic Converter (TWC), checking .

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0138	16522	02 Sensor Circ., Bank 1-Sensor 2 High Voltage	Check oxygen sensor heating after Three Way Catalytic Converter (TWC) → Heated Oxygen Sensor (HO2S) after Three Way Catalytic Converter (TWC), checking .
P0139	16523	02 Sensor Circ., Bank 1-Sensor 2 Slow Response
P0140	16524	02 Sensor Circ., Bank 1-Sensor 2 No Activity Detected
P0170	16554	Fuel Trim, Bank 1 Malfunction	Check fuel pressure regulator and holding pressure → Fuel pressure regulator and residual pressure, checking . Check quantity of fuel injected and check for leaks. Check fuel pump. → 20 - FUEL SUPPLY Check intake system for leaks → Intake air system, checking for leaks (unmetered air) . Check Secondary Air Injection (AIR) system for leaks. → 26 - EXHAUST SYSTEM, EMISSION CONTROLS Check vacuum lines for leaks.

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0171	16555	Fuel Trim, Bank 1 System too Lean	Check fuel pressure regulator and holding pressure → Fuel pressure regulator and residual pressure, checking . Check quantity of fuel injected and check for leaks. Check fuel pump. → 20 - FUEL SUPPLY Check intake system for leaks → Intake air system, checking for leaks (unmetered air) . Check exhaust system for leaks. → 26 - EXHAUST SYSTEM, EMISSION CONTROLS Check Secondary Air Injection (AIR) system for leaks. → 26 - EXHAUST SYSTEM, EMISSION CONTROLS Check vacuum lines for leaks.

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0172	16556	Fuel Trim, Bank 1 System too rich	Check fuel pressure regulator and holding pressure → Fuel pressure regulator and residual pressure, checking . Check quantity of fuel injected and check for leaks. Check Evaporative Emission (EVAP) canister purge regulator valve N80. → 20 - FUEL SUPPLY

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0300	16684	Random/Multiple Cylinder Misfire Detected	Check fuel injectors → output Diagnostic Test Mode (DTM), → Output Diagnostic Test Mode (DTM), activating . Check ignition cables and spark plugs → Ignition system components, removing and installing . Check ignition coils → Ignition coils with power output stage, checking . Check misfire detection → Misfire recognition, checking .
P0301	16685	Cyl.1 Misfire Detected
P0302	16686	Cyl.2 Misfire Detected
P0303	16687	Cyl.3 Misfire Detected
P0304	16688	Cyl.4 Misfire Detected
P0305	16687	Cyl.5 Misfire Detected
P0306	16688	Cyl.6 Misfire Detected
P0321	16705	Ign./Distributor Eng. Speed Inp. Circ Range/Performance	Check engine speed (RPM) sensor → Engine speed (RPM) sensor G28 , checking .
P0322	16706	Ign./Distributor Eng. Speed Inp. Circ. No Signal

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0327	16711	Knock Sensor 1 Circ. Low Input	Check knock sensor and knock control → Knock sensors, checking . Loosen knock sensor and retighten to 20 Nm.
P0328	16712	Knock Sensor 1 Circ. High Input
P0332	16716	Knock Sensor 2 Circ. Low Input
P0333	16717	Knock Sensor 2 Circ. High Input
P0341	16725	Camshaft Pos. Sensor Circ Range/Performance	Check Camshaft Position (CMP) sensor G40 → Camshaft Position (CMP) sensor G40 , checking
P0342	16726	Camshaft Pos.Sensor Circ Low Input
P0343	16727	Camshaft Pos.Sensor Circ High Input
P0411	16795	Sec. Air Inj. Sys. Incorrect Flow Detected	Check secondary air pump motor. → 26 - EXHAUST SYSTEM, EMISSION CONTROLS
P0420	16804	Catalyst System, Bank1 Efficiency Below Threshold	Check Three Way Catalytic Converter (TWC). → 26 - EXHAUST SYSTEM, EMISSION CONTROLS

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0440	16824	EVAP Emission Contr. Sys Malfunction	Check Evaporative Emission (EVAP) canister purge regulator valve N80 → output Diagnostic Test Mode (DTM), → Output Diagnostic Test Mode (DTM), activating . Check Evaporative Emission (EVAP) canister purge regulator valve -N80-. → 20 - FUEL SUPPLY Check hoses and lines from fuel tank to throttle valve control module. → 20 - FUEL SUPPLY

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0441	16825	EVAP Emission Contr. Sys. Incorrect Purge Flow	Check Evaporative Emission (EVAP) canister purge regulator valve N80. → 20 - FUEL SUPPLY Check hoses and lines from fuel tank to throttle valve control module. → 20 - FUEL SUPPLY
P0442	16826	EVAP Emission Contr. Sys. (Small Leak) Leak Detected	Check Evaporative Emission (EVAP) system. → 20 - FUEL SUPPLY
P0455	16839	EVAP Emission Contr. Sys. (Gross Leak) Leak Detected
P0456	16840	EVAP Emission Contr. Sys. (Very Small Leak) Leak Detected	Check EVAP canister: → 20 - FUEL SUPPLY

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0501	16885	Vehicle Speed Sensor Range/Performance	Check speed signal → Vehicle speed signal, checking .
P0506	16890	Idle Control System RPM Lower than Expected	Check throttle valve control module → Throttle valve control module J338 , checking .
P0507	16891	Idle Control System RPM Higher than Expected
P0560	16944	System Voltage Malfunction	Check voltage supply → Engine Control Module (ECM) voltage supply, checking . Procedure after interrupting voltage supply → Engine Control Module (ECM) voltage supply open circuit, correcting
P0562	16946	System Voltage Low Voltage

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0563	16947	System Voltage High Voltage	Check voltage supply → Engine Control Module (ECM) voltage supply, checking . Procedure after interrupting voltage supply → Engine Control Module (ECM) voltage supply open circuit, correcting
P0571	16955	Cruise/Brake Switch ( A ) Circ Malfunction ¹⁾	Check brake light switch and brake pedal switch → Brake light switch and brake pedal switch signal, checking
P0601	16985	Internal Contr. Module Memory Check Sum Error	Replace Motronic Engine Control Module (ECM) J220 → Engine Control Module (ECM), replacing .
P0603	16987	Internal Contr. Module ( KAM ) Error
P0604	16988	Internal Contr. Module Random Access Memory (RAM ) Error
P0605	16989	Internal Contr. Module ROM Test Error	Replace Motronic Engine Control Module (ECM) J220 → Engine Control Module (ECM), replacing .
¹⁾ The system monitors both brake light switch - F - and brake pedal switch F47 .

Diagnostic Trouble Codes (DTCs)		Diagnostic Trouble Code (DTC) display	Corrective action
SAE	VAG
P0638	17022	Throttle valve control module J338 - Implausible signal	Check throttle valve control module → Throttle valve control module J338 , checking . Adapt engine control module to throttle valve control module → Engine Control Module (ECM) to throttle valve control module, adaptation . Check battery, charge if necessary. Clean throttle valve control module. Check throttle position sensor: → 20 FUEL SUPPLY