Proton fault codes
8,866 codes · 50 vehicle records · 175 ECU records · 0 live-data parameters
Codes 8,866
| Code | Description | Brands | System |
|---|---|---|---|
| P219D | Cylinder 2 air-fuel ratio imbalance | 19 | Powertrain |
| P219E | Cylinder 3 air-fuel ratio imbalance | 19 | Powertrain |
| P219F | Cylinder 4 air-fuel ratio imbalance | 19 | Powertrain |
| P21A0 | Cylinder 5 air-fuel ratio imbalance | 18 | Powertrain |
| P21A1 | Cylinder 6 air-fuel ratio imbalance | 18 | Powertrain |
| P21CF | Cylinder 1 injector 'B' circuit/open | 19 | Powertrain |
| P21D0 | Cylinder 2 injector 'B' circuit/open | 19 | Powertrain |
| P21D1 | Cylinder 3 injector 'B' circuit/open | 18 | Powertrain |
| P21D2 | Cylinder 4 injector 'B' circuit/open | 15 | Powertrain |
| P21D3 | Cylinder 5 injector 'B' circuit/open | 14 | Powertrain |
| P21D4 | Cylinder 6 injector 'B' circuit/open | 14 | Powertrain |
| P21DB | Compressed Natural Gas (CNG) Injector Line Voltage Low (Cylinder 1) | 19 | Powertrain |
| P21DC | Compressed Natural Gas (CNG) Injector Line Voltage High (Cylinder 1) | 20 | Powertrain |
| P21DE | Compressed Natural Gas (CNG) Injector Line Voltage Low (Cylinder 2) | 19 | Powertrain |
| P21DF | Compressed Natural Gas (CNG) Injector Line Voltage High (Cylinder 2) | 20 | Powertrain |
| P21E0 | Compressed Natural Gas (CNG) Injector Line Voltage Low (Cylinder 3) | 19 | Powertrain |
| P21E1 | Compressed Natural Gas (CNG) Injector Line Voltage High (Cylinder 3) | 19 | Powertrain |
| P21E2 | Compressed Natural Gas (CNG) Injector Line Voltage Low (Cylinder 4) | 16 | Powertrain |
| P21E3 | Compressed Natural Gas (CNG) Injector Line Voltage High (Cylinder 4) | 16 | Powertrain |
| P2226 | Barometric Pressure Sensor A Circuit | 37 | Powertrain |
| P2227 | Barometric pressure sensor A circuit range/performance | 35 | Powertrain |
| P2228 | Barometric Pressure Sensor A Circuit Low | 42 | Powertrain |
| P2229 | Short circuit to positive or line break | 42 | Powertrain |
| P2231 | O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 1 Sensor 1) | 36 | Powertrain |
| P2232 | Downstream oxygen sensor signal failure | 30 | Powertrain |
| P2237 | Upstream oxygen sensor positive current control circuit open | 35 | Powertrain |
| P2238 | O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1 | 32 | Powertrain |
| P2239 | O2 Sensor Positive Current Control Circuit High Bank 1 Sensor 1 | 33 | Powertrain |
| P2240 | O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1 | 34 | Powertrain |
| P2241 | O2 Sensor Positive Current Control Circuit Low Bank 2 Sensor 1 | 31 | Powertrain |
| P2242 | O2 Sensor Positive Current Control Circuit High Bank 2 Sensor 1 | 33 | Powertrain |
| P2243 | Upstream oxygen sensor reference voltage circuit open | 34 | Powertrain |
| P2244 | O2 Sensor Reference Voltage Performance (Bank 1 Sensor 1) | 31 | Powertrain |
| P2245 | O2 Sensor Reference Voltage Circuit Low (Bank 1 Sensor 1) | 31 | Powertrain |
| P2246 | O2 Sensor Reference Voltage Circuit High (Bank 1 Sensor 1) | 28 | Powertrain |
| P2247 | O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 1 | 31 | Powertrain |
| P2249 | O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1 | 29 | Powertrain |
| P2251 | Upstream oxygen sensor negative current control circuit open | 35 | Powertrain |
| P2252 | O2 Sensor Negative Current Control Circuit Low Bank 1 Sensor 1 | 33 | Powertrain |
| P2253 | O2 Sensor Negative Current Control Circuit High Bank 1 Sensor 1 | 33 | Powertrain |
| P2254 | O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 1 | 34 | Powertrain |
| P2255 | O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1 | 32 | Powertrain |
| P2256 | O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 | 32 | Powertrain |
| P2261 | Pressure relief valve mechanical failure | 33 | Powertrain |
| P2263 | Turbocharger/Supercharger Boost System Performance | 33 | Powertrain |
| P2265 | Water in Fuel Sensor A Circuit Range/Performance | 31 | Powertrain |
| P226B | Turbocharger/Supercharger A Boost Pressure Too High - Mechanical | 28 | Powertrain |
| P226C | Turbocharger Boost Control A Slow Response | 18 | Powertrain |
| P226D | Particulate Filter Deteriorated/Missing Substrate (Bank 1) | 27 | Powertrain |
| P2270 | O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 2) | 38 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.