DFFS fault codes
7,984 codes · 47 vehicle records · 0 ECU records · 0 live-data parameters
Codes 7,984
| Code | Description | Brands | System |
|---|---|---|---|
| P2098 | Post Catalyst Fuel Trim System Too Lean (Bank 2) | 36 | Powertrain |
| P2099 | Post Catalyst Fuel Trim System Too Rich (Bank 2) | 35 | Powertrain |
| P209A | Reductant injection air pressure sensor 'B' circuit | 21 | Powertrain |
| P209B | Reductant injection air pressure sensor 'B' circuit range/performance | 22 | Powertrain |
| P209C | Reductant injection air pressure sensor 'B' circuit low | 21 | Powertrain |
| P209D | Reductant injection air pressure sensor 'B' circuit high | 21 | Powertrain |
| P209E | Reductant injection air pressure sensor 'A'/'B' correlation | 21 | Powertrain |
| P209F | Reductant Tank Heater Control Circuit Performance | 27 | Powertrain |
| P20A0 | Reductant Purge Control Valve A Circuit /Open | 27 | Powertrain |
| P20A1 | Reductant Purge Control Valve A Performance | 27 | Powertrain |
| P20A2 | Reductant Purge Control Valve Circuit Low | 27 | Powertrain |
| P20A3 | Reductant Purge Control Valve Circuit High | 26 | Powertrain |
| P20A4 | Reductant Purge Control Valve Stuck Open | 20 | Powertrain |
| P20A5 | Reductant Purge Control Valve A Stuck Closed | 23 | Powertrain |
| P20A6 | Reductant injection air pressure control valve circuit/open | 21 | Powertrain |
| P20A7 | Reductant injection air pressure control valve performance | 20 | Powertrain |
| P20A8 | Reductant injection air pressure control valve circuit low | 20 | Powertrain |
| P20A9 | Reductant injection air pressure control valve circuit high | 20 | Powertrain |
| P20AA | Reductant injection air pressure control valve stuck open | 20 | Powertrain |
| P20AB | Reductant injection air pressure control valve stuck closed | 20 | Powertrain |
| P20AC | Reductant Metering Unit Temperature Sensor Circuit | 23 | Powertrain |
| P20AD | Reductant Metering Unit Temperature Sensor Circuit Range/Performance | 25 | Powertrain |
| P20AE | Reductant Metering Unit Temperature Sensor Circuit Low | 24 | Powertrain |
| P20AF | Reductant metering unit temperature sensor circuit high | 21 | Powertrain |
| P20B0 | Reductant Metering Unit Temperature Sensor Circuit Intermittent/Erratic | 23 | Powertrain |
| P20B1 | Reductant Heater Coolant Control Valve Circuit/Open | 24 | Powertrain |
| P20B2 | Reductant Heater Coolant Control Valve Performance/Stuck Open | 26 | Powertrain |
| P20B3 | Reductant Heater Coolant Control Valve Circuit Low | 24 | Powertrain |
| P20B4 | Reductant Heater Coolant Control Valve Circuit High | 24 | Powertrain |
| P20B5 | Reductant metering unit heater control circuit/open | 21 | Powertrain |
| P20B6 | Reductant metering unit heater control circuit performance | 20 | Powertrain |
| P20B7 | Reductant metering unit heater control circuit low | 22 | Powertrain |
| P20B8 | Reductant metering unit heater control circuit high | 21 | Powertrain |
| P20B9 | Reductant Heater A Control Circuit/Open | 26 | Powertrain |
| P20BA | Reductant Heater A Control Circuit Performance | 25 | Powertrain |
| P20BB | Reductant Heater A Control Circuit Low | 26 | Powertrain |
| P20BC | Reductant Heater A Control Circuit High | 26 | Powertrain |
| P20BD | Reductant heater 'B' control circuit/open | 26 | Powertrain |
| P20BE | Reductant heater 'B' control circuit performance | 26 | Powertrain |
| P20BF | Reductant heater 'B' control circuit low | 27 | Powertrain |
| P20C0 | Reductant Heater B Control Circuit High | 26 | Powertrain |
| P20C1 | Reductant Heater C Control Circuit/Open | 24 | Powertrain |
| P20C2 | Reductant Heater C Control Circuit Performance | 26 | Powertrain |
| P20C3 | Reductant Heater C Control Circuit Low | 25 | Powertrain |
| P20C4 | Reductant Heater C Control Circuit High | 24 | Powertrain |
| P20C5 | Reductant heater 'D' control circuit/open | 21 | Powertrain |
| P20C6 | Reductant heater 'D' control circuit performance | 22 | Powertrain |
| P20C7 | Reductant heater 'D' control circuit low | 21 | Powertrain |
| P20C8 | Reductant heater 'D' control circuit high | 20 | Powertrain |
| P20C9 | Reductant control module requested MIL illumination | 23 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.