Powertrain, generic (extended)

P2EAE Reductant Injection Valve Circuit Range/Performance Bank 1 Unit 2

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2EAE concerns the second DEF injector on bank 1. Open, low and high circuit faults have their own codes, P2053 to P2055; here the circuit works, yet its signal does not fit a properly moving valve. GM uses it on the 2023 3.0 L Duramax LZ0 to detect a stuck second injector: from the current trace of each injection it takes the second derivative, in which the armature movement shows up as a kink, and fails the test when too few samples cross a threshold that depends on injector temperature and battery voltage, judged over 5 of 10 samples, type A with MIL after one trip. Delphi's patent US11280245 explains this kink method and its limits with chopped drive voltage. The 2025 GM table no longer lists P2EAE. Causes are urea crystals, a seized armature and contact faults.

Likely causes

Armature of the second injector sticking from urea crystals
Corroded contacts distorting the current trace
Injector coil with changed characteristics

Symptoms

  • Check engine lamp on
  • DEF system warning
  • Higher NOx emissions

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 b1 u2wiring harnessengine control module

Related codes

P2EB9P2EAFP2053P2054P2055P202E

References: gsi.ext.gm.com, patents.google.com, law.cornell.edu.