P2054Reductant Injection Valve Circuit Low (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
- P2054 flags a ground short in the switched circuit of the second DEF injector in the Bank 1 line. GM's 2025 diesel table (25OBDG04B) checks DEF metering valve 2 for this with the key on, the engine not cranking and more than 11 V, then sets a Type A code after 30 of 60 samples. Deutz uses P2054 on EMR5 engines for metering unit 2 with failure type 11, voltage below normal. Ford's 2023 diesel summary lists P2054 next to the circuit checks of its single injector but defines it as a resistance deviation below minus 2 ohm, so on a Ford the code points to a coil whose resistance has drifted low rather than to a second valve. Typical causes are a pinched wire, a shorted coil or a wet connector; the affected valve stops dosing.
- What you may notice
- MIL on
- Dosing at the affected valve stopped
- DEF warning message
- Likely causes
- LikelyPinched or chafed wire to injector 2 touching ground
- PossibleCoil resistance too low due to shorted turns (Ford definition)
- RareWater or DEF in the injector connector
- 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.