P208AReductant Pump A Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P208A reports an open or otherwise faulty drive circuit of the main DEF pump, the one that builds dosing pressure. Ford's 2023 diesels flag it when pump voltage sits between 2.6 and 3.4 V or the pump controller supply falls under 6 V, tested with the driver off and confirmed after 8 s. GM's 2018 diesel table takes a phase-open message from the DEF module, 32 of 40 samples, Type A; Volkswagen's 2014 Touareg TDI expects 4.70 to 5.40 V on an open line, and Deutz EMR5 files current below normal as P208A-13. Several bulletins blame software rather than parts: Volvo and Mack 2016–2017 chassis at cold start, Range Rover Velar 2.0 diesel together with P208C-11, and GM 23-NA-008 for 2022 trucks whose pump ran against frozen DEF. FCA counts it among inducement triggers.
- What you may notice
- MIL and DEF dosing malfunction message
- No engine restart countdown
- Fault often logged at cold start
- Likely causes
- LikelyUnplugged, corroded or broken pump connector or wire
- PossiblePump controller or ECU software (Volvo/Mack, JLR, GM 23-NA-008)
- PossibleLow supply to the pump controller from fuse, relay or ground
- PossiblePump motor winding open, pump unit failed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.