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U0287 Lost Communication With Transmission Fluid Pump Module A

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

An electric transmission fluid pump with its own control electronics keeps hydraulic pressure available whenever the engine stands still, in auto stop or electric driving. Stellantis calls it transmission fluid pump module 1; the TCM sets U0287 when it stops responding. On 2021–2025 Jeep Wrangler and Grand Cherokee 4xe, TSB 21-041-26 links the code with MIL and limp mode to a failed in-pan pump, and 08-082-25 traces cases to a damaged high-voltage cable whose noise reaches the pump circuit. The 2026 Compass with 8F30 gets a new pump and TCM software (21-058-26), with stop-start off and a service transmission message. Hyundai sets U028700 in the pump itself on the 2.5 Santa Fe and Tucson with eight-speed automatic, disabling Idle Stop and Go (26-AT-002H).

Likely causes

Electric fluid pump or its integrated electronics failed
Pump connector not fully latched
Damaged high-voltage cable inducing interference on the pump circuit (hybrids)
Transmission control module software outdated

Symptoms

  • Malfunction indicator lamp and service transmission or hybrid message
  • Engine stop-start disabled
  • Limp mode on plug-in hybrids

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–1,800
Time0.5–7.5 h

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

Parts involved

transmission fluid pump module avehicle bus wiring

Related codes

U0588U028AP0B0DP2797

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.