Powertrain, generic (extended)

P2054 Reductant Injection Valve Circuit Low (Bank 1 Unit 2)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Pinched or chafed wire to injector 2 touching ground
Coil resistance too low due to shorted turns (Ford definition)
Water or DEF in the injector connector

Symptoms

  • MIL on
  • Dosing at the affected valve stopped
  • DEF warning message

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–900
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

reductant injection valve

Related codes

P2053P2055P2048P2057

References: gsi.ext.gm.com, serdia.deutz.com, fordservicecontent.com.