Audi fault codes
128 distinct codes across 156 real diagnostics on Audi, including the Audi-specific ones no generic code list can decode.
Audi-specific codes
These are manufacturer-specific, which means the same code on another marque is a different fault. That is exactly why they have no page of their own here and no entry in any generic code list: a single description for one of these would be wrong more often than right. Below they are scoped to Audi, ranked by how often we have actually seen them, which is a claim we can stand behind.
| Code | Diagnostics on Audi |
|---|---|
| B149C | 3 |
| P164D | 3 |
| P334A | 3 |
| U1121 | 3 |
| B1162 | 2 |
| B11AF | 2 |
| C1041 | 2 |
| P1570 | 2 |
| P191A | 2 |
| P3020 | 2 |
| B1049 | 1 |
| B108C | 1 |
| B108D | 1 |
| B1092 | 1 |
| B10CE | 1 |
| B10E8 | 1 |
| B1183 | 1 |
| B12CC | 1 |
| B1304 | 1 |
| B13BC | 1 |
| C1034 | 1 |
| C1047 | 1 |
| C1048 | 1 |
| C1103 | 1 |
| C11E2 | 1 |
| P1016 | 1 |
| P106B | 1 |
| P1297 | 1 |
| P13D4 | 1 |
| P1545 | 1 |
| P1680 | 1 |
| P1701 | 1 |
| P176A | 1 |
| P179E | 1 |
| P1912 | 1 |
| P3007 | 1 |
| P3348 | 1 |
| U1011 | 1 |
| U1113 | 1 |
| U1123 | 1 |
| U11F9 | 1 |
| U1400 | 1 |
| U1406 | 1 |
| U140A | 1 |
| U3501 | 1 |
To turn one of these into a cause you need the marque, the model and the engine, which is what the tool does. A code on its own is a starting point, not an answer.
Standard codes we see most on Audi
These are standardised, so they mean the same thing on every vehicle and each one has a page of its own. The counts are what we see on Audi specifically.
| Code | What it is | On Audi |
|---|---|---|
| P0562 | System voltage low | 12 |
| P2002 | Diesel particulate filter efficiency below threshold, bank 1 | 11 |
| U0416 | Invalid data received from vehicle dynamics control module | 11 |
| P0401 | Exhaust gas recirculation flow insufficient | 5 |
| P0299 | Turbocharger underboost condition | 4 |
| P0302 | Cylinder 2 misfire detected | 4 |
| B2000 | Not individually documented | 3 |
| P0019 | Crankshaft/camshaft position correlation, bank 2 sensor B | 3 |
| P0222 | Throttle or pedal position sensor B circuit low | 3 |
| P0236 | Turbocharger boost sensor A circuit range/performance | 3 |
| P0300 | Random or multiple cylinder misfire detected | 3 |
| P0301 | Cylinder 1 misfire detected | 3 |
| P0322 | Ignition or distributor engine speed input circuit, no signal | 3 |
| P0C2E | Not individually documented | 3 |
| P2015 | Intake manifold runner position sensor circuit range/performance, bank 1 | 3 |
| P204B | Not individually documented | 3 |
| P2196 | O2 sensor signal biased or stuck rich, bank 1 sensor 1 | 3 |
| P2458 | Diesel particulate filter regeneration duration | 3 |
| P2563 | Turbocharger boost control position sensor circuit range/performance | 3 |
| U0121 | Lost communication with ABS control module | 3 |
| P0068 | MAP/MAF to throttle position correlation | 2 |
| P0101 | Mass or volume air flow circuit range/performance | 2 |
| P0201 | Injector circuit open, cylinder 1 | 2 |
| P0202 | Injector circuit open, cylinder 2 | 2 |
| P0203 | Injector circuit open, cylinder 3 | 2 |
| P0303 | Cylinder 3 misfire detected | 2 |
| P0321 | Ignition or distributor engine speed input circuit range/performance | 2 |
| P0420 | Catalyst system efficiency below threshold, bank 1 | 2 |
| P0507 | Idle air control system RPM higher than expected | 2 |
| P0A7D | Not individually documented | 2 |
| P2006 | Not individually documented | 2 |
| P2032 | Not individually documented | 2 |
| P2049 | Not individually documented | 2 |
| P2188 | System too rich at idle, bank 1 | 2 |
| P225B | Not individually documented | 2 |
| P23AD | Not individually documented | 2 |
| P2425 | Not individually documented | 2 |
| P2426 | Exhaust gas recirculation cooling valve control circuit low | 2 |
| P2463 | Diesel particulate filter restriction, soot accumulation | 2 |
| U010E | Not individually documented | 2 |
What tends to go wrong on Audi
By share of the codes we have seen on this marque. A description of our own caseload, not a reliability ranking.
- Bus communication · 30
- Powertrain, manufacturer-specific · 24
- Body, manufacturer-specific · 21
- Not yet classified · 18
- Diesel particulate filter · 18
- Air intake and MAF/MAP · 12
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Learn more: Diagnostic (vehicle-first start), Diagnostic form: description, error codes and mileage
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo (JPEG or PNG) of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Learn more: OBD reader photo scan (fault codes from a photo), Voice input for the problem description
Are the public fault code pages built from my diagnostics?
They are built from anonymised, aggregated diagnostics run in WrenchLane; no workshop, customer or vehicle can be identified. Each fault code page shows how often the code was seen across those diagnostics and in how many separate workshops.
Learn more: Fault code pages on wrenchlane.com (fault-code cluster)
Decode a Audi code against the actual car
Enter the code, the model and the symptoms and get ranked probable causes for that specific vehicle, with the checks in the order worth doing them. Free account, no card.
Start free