U058BInvalid Data Received From Transmission Fluid Pump Module B
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- Some transmissions carry a second electrically driven oil pump with its own electronics, labelled module B, alongside or instead of a first one. Its job is to hold clutch pressure and lubrication while the combustion engine is off, so the receiving transmission or hybrid controller depends on the speed, current and fault status the pump reports. U058B is logged when those reports arrive but fail plausibility, counter or checksum checks. No manufacturer documents U058B or a pump B publicly. For pump A, Jeep replaces the in-pan electric pump on Wrangler and Grand Cherokee 4xe when lost communication U0287 appears with the MIL and limp mode. Expect start-stop or electric driving to be inhibited until the fault clears; U028A is the lost-communication partner.
- What you may notice
- Start-stop or electric drive mode unavailable
- Transmission warning message
- Delayed engagement after an engine restart
- Likely causes
- LikelyIntegrated electronics of electric pump B faulty
- PossiblePump B connector or pass-through in the transmission case wet or loose
- RarePump firmware and transmission controller software not compatible
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.