P202EReductant Injection Valve Circuit Range/Performance (Bank 1 Unit 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P202E concerns the first DEF dosing valve on bank 1, which in most SCR systems is the only one. The circuit itself is intact, but the valve does not behave as commanded. GM's 6.6 L LML (2014 table) checks what the valve driver was told to do against the actual state of its circuit and sets a Type A code after more than ten mismatches within 80 injections, checked only with the coil between about −7 and 100 °C. In GM's 2018 diesel tables an active stuck-tip fault of the valve also blocks the SCR efficiency test P20EE. Chrysler reflashed the dosing control unit of 2013–2014 Ram 2500 to 5500 with 6.7 L Cummins against needless P202E (bulletin 18-010-14), and Hino traced some cases on 2013 J08 trucks to software misjudging DEF pressure. Real faults are crystal-stuck valves or bad contacts; too little DEF raises NOx.
- What you may notice
- Malfunction indicator lamp on
- DEF system warning, possibly countdown to speed limitation
- Possibly additional SCR efficiency codes
- Likely causes
- LikelyDosing valve sticking from urea crystals or a clogged tip
- PossibleDosing or engine control unit software (updates available on some models)
- PossibleCorroded valve connector or harness
- RareDEF pressure at the valve outside the expected range
- 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 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.