Code result
P27E4
Electric/Auxiliary Transmission Fluid Pump Control Valve Circuit Range/Performance
High severity
What it means
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?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Coil resistance out of range
mediumA plausible cause — test and verify before replacing parts.
High-resistance contact in connector
mediumA plausible cause — test and verify before replacing parts.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Related help
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