OBD-II code · Powertrain (generic, extended)
P27E4 Electric/Auxiliary Transmission Fluid Pump Control Valve Circuit Range/Performance
The control circuit for the auxiliary transmission fluid pump control valve reports a circuit range/performance condition. Pump pressure regulation cannot be commanded as expected.
Is it safe to drive with P27E4?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- PossibleCoil resistance out of range
- PossibleHigh-resistance contact in connector
- Less likelySensor element aged beyond calibration window
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Aux Transmission Pump Control Valve, Wiring Harness, Tcm
Related codes
- P27E1Electric/Auxiliary Transmission Fluid Pump A Pressure Too Low
- P27E2Electric/Auxiliary Transmission Fluid Pump B Pressure Too Low
- P27E3Electric/Auxiliary Transmission Fluid Pump Control Valve Circuit/Open
- P27E5Electric/Auxiliary Transmission Fluid Pump Control Valve Circuit Low
- P27E6Electric/Auxiliary Transmission Fluid Pump Control Valve Circuit High
- P27E7Transmission Range Control B Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.