Audi OBD Codes: Meaning & Fixes
Audi: 28 error codes with meaning, severity, likely causes and repair cost estimates.
25Codes
2.7Average severity
16%High or critical
12%DIY-friendly
Severity distribution
Field data · Audi
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.
Most viewed
P0420
Powertrain
The bank 1 catalytic converter no longer stores enough oxygen to clean the exhaust properly.
Low
P0171
Powertrain
The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees…
Moderate
P0700
Powertrain
The transmission computer found a fault and asked for the check engine light – read the TCM…
Moderate
P0301
Powertrain
Cylinder 1 is repeatedly failing to fire. The cause is almost always its coil, plug, injector…
Moderate
P0087
Powertrain
Measured fuel pressure has dropped well below what the engine computer is asking for.
High
P0089
Powertrain
The fuel pressure regulator is getting its commands but pressure isn't responding the way it…
Moderate
All codes (4)
P0087
Powertrain
Measured fuel pressure has dropped well below what the engine computer is asking for.
High
P1340
Volkswagen · Powertrain
The cam signal no longer lines up with the crank signal – often a jumped belt or stretched…
High
P1735
Volkswagen · Powertrain
The DSG control unit lost a valid signal from the sensor that tracks clutch 1 and locks out…
High
P175D
Volkswagen · Powertrain
The DSG computer saw clutch 1 let go while it was supposed to stay engaged, so it cut…
High