21 distinct codes across 21 real Chevrolet diagnostics.
21 distinct codes across 21 real diagnostics on Chevrolet, including the Chevrolet-specific ones no generic code list can decode.
Chevrolet-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 and no entry in any generic code list. Scoped to Chevrolet and ranked by how often we have actually seen them, they are a claim we can stand behind.
- P1133, seen in 3 Chevrolet diagnostics
Standard codes we see most on Chevrolet
These are standardised, so they mean the same thing on every vehicle. The counts are what we see on Chevrolet specifically.
- P0420, Catalyst system efficiency below threshold, bank 1
- C0561, not individually documented
- C0899, not individually documented
- P0700, Transmission control system, MIL request
- P0751, Shift solenoid A performance or stuck off
- P0335, Crankshaft position sensor A circuit
- P0010, A camshaft position actuator circuit, bank 1
- P0013, B camshaft position actuator circuit, bank 1
- P0300, Random or multiple cylinder misfire detected
- P0030, O2 sensor heater control circuit, bank 1 sensor 1
- P0087, Fuel rail/system pressure too low
- P0135, O2 sensor heater circuit, bank 1 sensor 1
- P0302, Cylinder 2 misfire detected
- P0521, Engine oil pressure sensor or switch range/performance
- P0703, Brake switch B circuit
- P2138, Throttle or pedal position sensor D/E voltage correlation
- U0121, Lost communication with ABS control module
- U2105, not individually documented
What tends to go wrong on Chevrolet
By share of the codes we have seen on this marque. A description of our own caseload, not a reliability ranking.
- Transmission, 13 code sightings
- Chassis, manufacturer-specific, 12 code sightings
- Catalytic converter, 7 code sightings
- Valve timing and camshaft, 7 code sightings
- Lambda and O2 sensors, 3 code sightings
- Misfire, 3 code sightings