Check-engine codes
What does my check-engine code mean?
Plain-English explanations for OBD-II trouble codes: what the code means, the most likely causes, symptoms, and how much labour a repair usually takes.
P2 codes · Powertrain (generic, extended)
- P21F4Fuel Control System B Too Lean Off Idle (Bank 1)
- P21F5Fuel Control System B Too Rich Off Idle (Bank 1)
- P21F6Fuel Control System B Too Lean Off Idle (Bank 2)
- P21F7Fuel Control System B Too Rich Off Idle (Bank 2)
- P21F8Fuel Control System B Too Lean at Idle (Bank 1)
- P21F9Fuel Control System B Too Rich at Idle (Bank 1)
- P21FAFuel Control System B Too Lean at Idle (Bank 2)
- P21FBFuel Control System B Too Rich at Idle (Bank 2)
- P21FCFuel Control System B Too Lean at Higher Load (Bank 1)
- P21FDFuel Control System B Too Rich at Higher Load (Bank 1)
- P21FEFuel Control System B Too Lean at Higher Load (Bank 2)
- P21FFFuel Control System B Too Rich at Higher Load (Bank 2)
- P2200NOx Sensor Circuit (Bank 1)
- P2201NOx Sensor Range/Performance (Bank 1)
- P2202NOx Sensor Circuit Low (Bank 1)
- P2203NOx Sensor Circuit High (Bank 1)
- P2204NOx Sensor Circuit Intermittent (Bank 1)
- P2205NOx Sensor Heater Control Circuit (Bank 1)
- P2206NOx Sensor Circuit (Bank 2)
- P2207NOx Sensor Circuit Range/Performance (Bank 2)
- P2208NOx Sensor Heater Circuit (Bank 2)
- P2209NOx Sensor Heater Sense Circuit Range/Performance (Bank 2)
- P220ANOx Sensor Supply Voltage Circuit (Bank 1 Sensor 1)
- P220BNOx Sensor Supply Voltage Circuit (Bank 1 Sensor 2)
- P220CNOx Sensor Supply Voltage Circuit (Bank 2 Sensor 1)
- P220DNOx Sensor Supply Voltage Circuit (Bank 2 Sensor 2)
- P220ENOx Sensor Heater Control Circuit Range/Performance (Bank 1 Sensor 1)
- P220FNOx Sensor Heater Control Circuit Range/Performance (Bank 1 Sensor 2)
- P2210NOx Sensor Circuit Intermittent (Bank 2)
- P2211NOx Sensor Heater Sense Circuit Intermittent (Bank 2)
- P2212NOx Sensor Heater Sense Circuit Intermittent (Bank 1 Sensor 1)
- P2213NOx Sensor Circuit (Bank 2)
- P2214NOx Sensor Circuit Range/Performance (Bank 2)
- P2215NOx Sensor Circuit Low (Bank 2)
- P2216NOx Sensor Circuit High (Bank 2)
- P2217NOx Sensor Circuit Intermittent (Bank 2)
- P2218NOx Sensor Heater Control Circuit/Open (Bank 2)
- P2219NOx Sensor Heater Control Circuit Low (Bank 2)
- P221ANOx Sensor 1/2 Correlation (Bank 1)
- P221BNOx Sensor 1/2 Correlation (Bank 2)
- P221CReductant Heater B Current Too Low
- P221DReductant Heater B Current Too High
- P221EReductant Heater C Current Too Low
- P221FReductant Heater C Current Too High
- P2220NOx Sensor Heater Control Circuit High (Bank 2)
- P2221NOx Sensor Heater Sense Circuit (Bank 2)
- P2222NOx Sensor Heater Sense Circuit Range/Performance (Bank 2)
- P2223NOx Sensor Heater Sense Circuit Low (Bank 2)
- P2224NOx Sensor Heater Sense Circuit High (Bank 2)
- P2225NOx Sensor Heater Sense Circuit Intermittent (Bank 2)
- P2226Barometric Pressure Circuit
- P2227Barometric Pressure Circuit Range/Performance
- P2228Barometric Pressure Sensor Circuit Low
- P2229Barometric Pressure Sensor Circuit High
- P222ABarometric Pressure Sensor B Circuit
- P222BBarometric Pressure Sensor B Circuit Range/Performance
- P222CBarometric Pressure Sensor B Circuit Low
- P222DBarometric Pressure Sensor B Circuit High
- P222EBarometric Pressure Sensor B Circuit Intermittent/Erratic
- P222FBarometric Pressure Sensor A/B Correlation
- P2230Barometric Pressure Circuit Low
- P2231Barometric Pressure Circuit High
- P2232O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 1 Sensor 2)
- P2233O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 1 Sensor 3)
- P2234O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 2 Sensor 1)
- P2235O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 2 Sensor 2)
- P2236O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 2 Sensor 3)
- P2237O2 Sensor Pumping Current Circuit (Bank 1 Sensor 1)
- P2238O2 Sensor Pumping Current Circuit Low (Bank 1 Sensor 1)
- P2239O2 Sensor Pumping Current Circuit High (Bank 1 Sensor 1)
- P223AReductant Heater E Control Circuit
- P223BReductant Heater F Control Circuit
- P223CO2 Sensor Pumping Current Range/Performance (Bank 1)
- P223DO2 Sensor Pumping Current Range/Performance (Bank 2)
- P223EO2 Sensor Reference Resistance Out Of Range (Bank 1)
- P223FO2 Sensor Reference Resistance Out Of Range (Bank 2)
- P2240O2 Sensor Pumping Current Circuit (Bank 2 Sensor 1)
- P2241O2 Sensor Pumping Current Circuit Low (Bank 2 Sensor 1)
- P2242O2 Sensor Pumping Current Circuit High (Bank 2 Sensor 1)
- P2243O2 Sensor Reference Voltage Circuit (Bank 1 Sensor 1)
- P2244O2 Sensor Reference Voltage Circuit Range/Performance (Bank 1 Sensor 1)
- P2245O2 Sensor Reference Voltage Circuit Low (Bank 1 Sensor 1)
- P2246O2 Sensor Reference Voltage Circuit High (Bank 1 Sensor 1)
- P2247O2 Sensor Reference Voltage Circuit (Bank 2 Sensor 1)
- P2248O2 Sensor Reference Voltage Circuit Range/Performance (Bank 2 Sensor 1)
- P2249O2 Sensor Reference Voltage Circuit Low (Bank 2 Sensor 1)
- P224ANOx Sensor Heater Resistance (Bank 1 Sensor 1)
- P224BNOx Sensor Heater Resistance (Bank 1 Sensor 2)
- P224CAlternative Fuel Tank Shutoff Valve A Control Circuit/Open
- P224DAlternative Fuel Tank Shutoff Valve A Control Circuit Performance/Stuck Off
- P224EAlternative Fuel Tank Shutoff Valve A Control Circuit Low
- P224FAlternative Fuel Tank Shutoff Valve A Control Circuit High
- P2250O2 Sensor Reference Voltage Circuit High (Bank 2 Sensor 1)
- P2251O2 Sensor Negative Current Control Circuit (Bank 1 Sensor 1)
- P2252O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 1)
- P2253O2 Sensor Negative Current Control Circuit High (Bank 1 Sensor 1)
- P2254O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 1)
- P2255O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 1)
- P2256O2 Sensor Heater Control Circuit Low Bank 1 Sensor 2
- P2257Secondary Air Injection System Control A Circuit Low
Code data: OBDex open dataset (CC0), reviewed and rewritten for drivers. Always confirm a diagnosis before replacing parts.