Network, generic

U0588 Invalid Data Received From Transmission Fluid Pump Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

An electric transmission fluid pump keeps clutch and line pressure up while the engine is stopped by start-stop or in electric hybrid driving. Many such pumps have their own electronics and report speed, current and faults to the transmission or hybrid controller. U0588 means those reports arrive but cannot be trusted. Ford's 2014 OBD code list includes U0588 as a continuously monitored code without MIL. The lost-communication partner U0287 is better documented: Jeep sets it with MIL and limp mode on Wrangler and Grand Cherokee 4xe and replaces the in-pan pump, Hyundai on the Santa Fe and Tucson 2.5 with 8-speed automatic, where Idle Stop and Go stops working. Invalid data usually leads to the same reactions.

Likely causes

Electric pump or its integrated controller faulty
Pump connector not fully latched or wet
Pump and transmission controller software not matched

Symptoms

  • Start-stop function disabled
  • Service transmission or hybrid system message
  • Limp mode with limited gears on some hybrids

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–1,200
Time1–3 h

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

Parts involved

transmission fluid pump module a

Related codes

U0287U058BP0B0DP2797U0402

References: performanceparts.ford.com, static.nhtsa.gov, static.nhtsa.gov.