P2055Reductant Injection Valve Circuit High (Bank 1 Unit 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2055 is set when the control line of DEF injector 2 on Bank 1 is shorted to battery positive. In GM's 2025 diesel table (25OBDG04B) the power stage of metering valve 2 reports the short; with more than 11 V and 30 faulty readings out of 60 the ECM stores a Type A fault, just as P2049 does for valve 1. Deutz assigns failure type 12 (voltage above normal or short to the high source) to metering unit 2 on EMR5 engines. On Ford's 2023 diesels the code instead describes a coil resistance more than 2 ohm above expectation, which hints at corroded terminals or an ageing winding. Whatever the platform, a driver that detects overvoltage is disabled, so the second dosing point delivers nothing until the circuit is repaired.
- What you may notice
- MIL on
- Second dosing point inactive
- Increased NOx emissions
- Likely causes
- LikelyControl line of injector 2 shorted to battery positive
- PossibleCoil resistance too high, corroded terminals (Ford definition)
- RareDefective output stage for valve 2
- 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: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.