Powertrain, generic · Hybrid propulsion

P0B0D Electric/Auxiliary Transmission Fluid Pump Motor Control Module

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0B0D is an internal fault of the module that drives the auxiliary pump motor. GM documents it for the auxiliary transmission pump controller (ATPC) in its 2011 and 2014 hybrid tables and for the 2016 Cadillac ELR: it checks processor integrity, such as SPI hardware faults or a wrong seed and key between processors, with more than 9.5 V supply; 28 failures out of 32 samples in a 6.25 ms loop, detected within about 200 ms, set a Type A fault. Stellantis lists P0B0D-00 on the 2021-25 Jeep Wrangler 4xe and 2022-25 Grand Cherokee 4xe with the 8P75PH plug-in transmission (TSB 21-038-25, revised 21-041-26): MIL and limp mode, sometimes with U0287; the fix is a new in-pan electric pump. U0287 is lost communication with the pump module, P0C23 to P0C25 its circuit.

Likely causes

Electric pump with integrated control electronics failed (Jeep 4xe 8P75PH)
Processor or memory fault inside the pump control module
Supply voltage dips or poor ground at the module

Symptoms

  • MIL on
  • Transmission in limp mode
  • Possibly lost communication with the pump module (U0287)

Repair estimate

DifficultyHardWorkshop job
Parts and labour€400–2,000
Time1.5–4 h

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

Parts involved

aux trans pump control module

Related codes

P0C23P0C24P0C25U0287P2797

References: gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov.