You’re likely no stranger to the frustration of dealing with a malfunctioning vehicle, and you’re not alone – in fact, over 10 million vehicles in the US alone experience a check engine light issue every year. But did you know that Audi OBD/OBD2 codes can hold the key to quickly identifying and resolving the problem?
These codes, generated by your vehicle’s onboard computer, provide a wealth of information about the issue at hand. But what do they really mean, and how can you use them to get your Audi back on the road?
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Understanding Audi Diagnostic Codes
In terms of deciphering Audi diagnostic codes, it’s essential to understand the structure and significance of these codes.
You’ll need to familiarize yourself with the standard format of Audi OBD-II trouble codes, which include a numerical code assigned by the factory and a P-code defined by the Society of Automotive Engineers (SAE).
These codes monitor engine management, transmission, and emissions systems in your Audi vehicle, triggering a Malfunction Indicator Light (MIL) when a malfunction is detected.
With advanced scan tools, like VW/Audi Factory Scan Tools, you can retrieve and clear these codes, ensuring accurate and standard-compliant repairs.
Be aware that certain codes, starting with P1, require diagnosis by certified Audi specialists, as they’re not found in standard lists and need specialized knowledge to interpret.
Common Error Codes and Solutions
You’ve grasped the basics of Audi diagnostic codes, now it’s time to tackle common error codes and their solutions.
When dealing with Audi OBD-II Trouble, you may encounter error messages from the engine, such as P20B9, related to AdBlue tank and heater controller issues.
The P2002 code indicates particle trap bank 1 efficiency below threshold error. Other common codes include P0299, associated with oil consumption and DPF Regen/Flashing Coil/Oil warning light issues, and P2188, indicating System Too Rich Off Idle Bank 1 error.
Transmission-related error codes like P0810, P073F, and P072C may require gearbox replacement.
It’s essential to have detailed information and advanced diagnostic equipment to accurately diagnose and repair Audi vehicles.
Troubleshooting With OBD-II Scan Tools
One essential step in diagnosing Audi OBD-II trouble codes is using an OBD-II scan tool to retrieve diagnostic trouble codes (DTCs) from your vehicle’s onboard computer.
This tool provides valuable information for troubleshooting and repair.
You can use the scan tool to:
- Retrieve generic DTCs, which can identify issues like fuel and air metering system problems or transmission-related errors.
- Access manufacturer-specific codes, such as those starting with P1, which require advanced diagnostic equipment for accurate diagnosis and repair.
- View detailed information about the engine and other systems, helping you pinpoint the root cause of the issue.
Most Common Audi OBD-II Trouble Codes
| Code | Description |
|---|---|
| P0010 | Powertrain Control Module (PCM) failure, Variable valve timing actuator failure, Wiring issue |
| P0011 | Camshaft variable timing solenoid failure, Engine oil level is too low |
| P0012 | Camshaft variable timing solenoid failure, Engine oil level is too low |
| P0101 | Large vacuum leaks, Split Intake Air Boot or PCV Hose |
| P0171 | Control module software needs to be updated |
| P0174 | Control module software needs to be updated |
| P0300 | Worn out spark plugs, ignition wires, coil(s) |
| P0301 | Worn out spark plugs, ignition wires, coil(s) |
| P0302 | Worn out spark plugs, ignition wires, coil(s) |
| P1108 | O2 Sensor Heating Circ.,Bank2-Sensor1 Output too Low |
| P1109 | O2 Sensor Circ.,Bank2-Sensor2 Voltage too Low/Air Leak |
| P1110 | O2 Sensor Heating Circ.,Bank2-Sensor2 Short to B+ |
| P1344 | Ignition Coil Power Output Stage 2 Short to B+ |
| P1345 | Ignition Coil Power Output Stage 3 Short to Ground |
| P1346 | Ignition Coil Power Output Stage 3 Short to B+ |
| P1347 | Bank2,Crankshaft-/Camshaft os.Sens.Sign. Out of Sequence |
| P1348 | Ignition Coil Power Output Stage 1 Open Circuit |
| P1349 | Ignition Coil Power Output Stage 2 Open Circuit |
| P1350 | Ignition Coil Power Output Stage 3 Open Circuit |
| P1354 | Modulation Piston Displ.Sensor Circ. Malfunction |
| P1355 | Cyl. 1, ignition circuit Open Circuit |
| P1356 | Cyl. 1, ignition circuit Short to B+ |
| P1357 | Cyl. 1, ignition circuit Short to ground |
| P1358 | Cyl. 2, ignition circuit Open Circuit |
| P1372 | Cyl. 6, ignition circuit short to ground |
| P1373 | Cyl. 7, ignition circuit Open Circuit |
| P1374 | Cyl. 7, ignition circuit Short Circuit to B+ |
| P1375 | Cyl. 7, ignition circuit short to ground |
| P1376 | Cyl. 8, ignition circuit Open Circuit |
| P1377 | Cyl. 8, ignition circuit Short Circuit to B+ |
| P1378 | Cyl. 8, ignition circuit short to ground |
| P1386 | Internal Control Module Knock Control Circ.Error |
| P1387 | Internal Contr. Module altitude sensor error |
| P1388 | Internal Contr. Module drive by wire error |
| P1391 | Camshaft Pos.Sensor,Bank2 Short to Ground |
| P1392 | Camshaft Pos.Sensor,Bank2 Open Circ./Short to B+ |
| P1393 | Ignition Coil Power Output Stage 1 Electrical Malfunction |
| P1586 | Engine mount solenoid valves Short to B+ |
| P1587 | Engine mount solenoid valves Short to ground |
| P1588 | Engine mount solenoid valves Open circuit |
| P1600 | Power Supply (B+) Terminal 15 Low Voltage |
| P1602 | Power Supply (B+) Terminal 30 Low Voltage |
| P1603 | Internal Control Module Malfunction |
| P1604 | Internal Control Module Driver Error |
| P1605 | Rough Road/Acceleration Sensor Electrical Malfunction |
| P1606 | Rough Road Spec Engine Torque ABS-ECU Electrical Malfunction |
| P1607 | Vehicle speed signal Error message from instrument cluster |
| P1608 | Steering angle signal Error message from steering angle sensor |
| P1609 | Crash shut-down activated |
| P1611 | MIL Call-up Circ./Transm.Contr.Module Short to Ground |
| P1612 | Electronic Control Module Incorrect Coding |
| P1859 | Brake Switch Circ. Error Message from Engine Contr. |
| P1860 | Kick Down Switch Error Message from Engine Contr. |
| P1861 | Throttle Position (TP) sensor Error Message from ECM |
| P1862 | Data Bus Powertrain Missing message from instr. panel ECU |
| P1863 | Data Bus Powertrain Missing Message from St. Angle Sensor |
| P1864 | Data Bus Powertrain Missing message from ADR control module |
| P1865 | Data Bus Powertrain Missing message from central electronics |
| P1866 | Data Bus Powertrain Missing messages |
| P2A04 | Exhaust leak, Oxygen sensor failure, Powertrain Control Module (PCM) failure, Wiring issue |
| P2BA8 | Faulty NOx Sensors, NOx sensor failure |
