P0905
PowertrainTransmission Shifthigh severityGate Select Actuator Circuit Low
What P0905 Means
The gate select actuator circuit voltage is lower than expected. This indicates a short to ground or high-resistance fault affecting gear selection.
Symptoms
- Failure to shift
- Transmission fault light
- Limp mode
Common Causes
- Short to ground in wiring
- Faulty gate select actuator
- Damaged connector pins
- Transmission control module fault
Diagnostic Steps
- Scan for stored codes
- Check circuit for shorts to ground
- Measure actuator supply voltage
- Test actuator component resistance
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