Fuel and air mixture and additional emission regulations

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2004 Audi A6, 2003 Audi S6, 2003 Audi A6, 2002 Audi S6, and 2002 Audi A6. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC TROUBLE CODE P0102-P0160

SAE-DTC	DTC text	Corrective action
P0102	Mass or Volume Air Flow Circuit Low Input	Check intake air system for leaks (false air). See CHECKING INTAKE SYSTEM FOR LEAKS (UNMETERED AIR) . Check Mass Air Flow (MAF) Sensor -G70-. See MASS AIR FLOW (MAF) SENSOR -G70-, CHECKING .
P0103	Mass or Volume Air Flow Circuit High Input
P0112	Intake Air Temperature Sensor 1 Circuit Low	Check Intake Air Temperature (IAT) Sensor -G42-. See INTAKE AIR TEMPERATURE (IAT) SENSOR -G42-, CHECKING .
P0113	Intake Air Temperature Sensor 1 Circuit High
P0116	Engine Coolant Temperature Circuit Range/Performance	Check Engine Coolant Temperature (ECT) Sensor -G62-. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR -G62-, CHECKING . Check coolant regulator (thermostat). See ENGINE COOLING - 4.2L V8 5V - ART, AWN, BBD .
P0117	Engine Coolant Temperature Circuit Low
P0118	Engine Coolant Temperature Circuit High
P0130	O2 Sensor Circuit, Bank 1 Sensor 1	Check oxygen sensor heater for oxygen sensors before Three Way Catalytic Converter (TWC). See OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEFORE THREE WAY CATALYTIC CONVERTER (TWC), CHECKING . Check Oxygen Sensors (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING .
P0131	O2 Sensor Circuit Low Voltage, Bank 1 Sensor 1
P0132	O2 Sensor Circuit High Voltage, Bank 1 Sensor 1
P0133	O2 Sensor Circuit Slow Response, Bank 1 Sensor 1
P0134	O2 Sensor Circuit No Activity Detected, Bank 1 Sensor 1
P0136	O2 Sensor Circuit, Bank 1 Sensor 2	Check oxygen sensor heater for Oxygen Sensors (O2S) behind Three Way Catalytic Converter (TWC). See OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEHIND THREE WAY CATALYTIC CONVERTER (TWC), CHECKING . Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER, CHECKING .
P0137	O2 Sensor Circuit Low Voltage, Bank 1 Sensor 2
P0138	O2 Sensor Circuit High Voltage, Bank 1 Sensor 2
P0139	O2 Sensor Circuit Slow Response, Bank 1 Sensor 2
P0140	O2 Sensor Circuit No Activity Detected, Bank 1 Sensor 2
P0150	O2 Sensor Circuit, Bank 2 Sensor 1	Check oxygen sensor heater for oxygen sensors before Three Way Catalytic Converter (TWC). See OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEFORE THREE WAY CATALYTIC CONVERTER (TWC), CHECKING . Check Oxygen Sensors (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING .
P0151	O2 Sensor Circuit Low Voltage, Bank 2 Sensor 1
P0152	O2 Sensor Circuit High Voltage, Bank 2 Sensor 1
P0153	O2 Sensor Circuit Slow Response, Bank 2 Sensor 1
P0154	O2 Sensor Circuit No Activity Detected, Bank 2 Sensor 1
P0156	O2 Sensor Circuit, Bank 2 Sensor 2	Check oxygen sensor heater for Oxygen Sensors (O2S) behind Three Way Catalytic Converter (TWC). See OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEHIND THREE WAY CATALYTIC CONVERTER (TWC), CHECKING . Check Oxygen Sensors (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER, CHECKING .
P0157	O2 Sensor Circuit Low Voltage, Bank 2 Sensor 2
P0158	O2 Sensor Circuit High Voltage, Bank 2 Sensor 2
P0159	O2 Sensor Circuit Slow Response, Bank 2 Sensor 2
P0160	O2 Sensor Circuit No Activity Detected, Bank 2 Sensor 2

DIAGNOSTIC TROUBLE CODE P0321-P0445

SAE-DTC	DTC text	Corrective action
P0321	Ignition/Distributor Engine Speed Input Circuit Range/Performance	Check Engine Speed (RPM) Sensor -G28-. See ENGINE SPEED (RPM) SENSOR -G28-, CHECKING .
P0322	Ignition/Distributor Engine Speed Input Circuit No Signal
P0327	Knock Sensor 1 Circuit Low, Bank 1 or Single Sensor	Check knock sensors. See CHECK KNOCK SENSORS .
P0328	Knock Sensor 1 Circuit High, Bank 1 or Single Sensor
P0332	Knock Sensor 2 Circuit Low, Bank 2
P0333	Knock Sensor 2 Circuit High, Bank 2
P0341	Camshaft Position Sensor "A" Circuit Range/Performance, Bank 1 or Single Sensor	Check Camshaft Position (CMP) sensor. See CHECK CAMSHAFT POSITION (CMP) SENSOR .
P0346	Camshaft Position Sensor "A" Circuit Range/Performance Bank 2
P0422	Main Catalyst Efficiency Below Threshold, Bank 1	Check Oxygen Sensors (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING . Check Oxygen Sensors (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER, CHECKING . Check catalytic conversion. See TEST-ID 01: CATALYTIC CONVERTER .
P0432	Main Catalyst Efficiency Below Threshold, Bank 2
P0441	Evaporative Emission System Incorrect Purge Flow	Check Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-. See CHECKING EVAPORATIVE EMISSION (EVAP) CANISTER PURGE REGULATOR VALVE -N80- . EVAP canister system, check for proper seal. See EVAP CANISTER SYSTEM, CHECKING FOR PROPER SEAL .
P0442	Evaporative Emission System Leak Detected (small leak)
P0445	Evaporative Emission System Purge Control Valve Circuit Shorted