U0588 code meaning
Invalid Data Received From Transmission Fluid Pump Module A
What U0588 means
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.
U0588 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0588
- Start-stop function disabled
- Service transmission or hybrid system message
- Limp mode with limited gears on some hybrids
Common causes of U0588
- Most likelyElectric pump or its integrated controller faulty
- PossiblePump connector not fully latched or wet
- Less likelyPump and transmission controller software not matched
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Transmission fluid pump module a
What each part of U0588 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 88 | The exact fault in that area. |
What to do next
- Note U0588 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0588
What does U0588 mean?
U0588 means "Invalid Data Received From Transmission Fluid Pump Module A". An electric transmission fluid pump keeps clutch and line pressure up while the engine is stopped by start-stop or in electric hybrid driving. It is a generic code, so it means the same on every make.
Is it safe to drive with U0588?
Drive gently and only to a workshop. With U0588 the car can go into limp mode (reduced power) to protect itself.
Will U0588 fail an emissions test?
U0588 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0588 to fix?
Difficulty: hard. A typical repair takes 1 to 3 hours of work. This is a job for a workshop.
Will U0588 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.