P0803
PowertrainTransmissionlow severity1-4 Upshift (Skip Shift) Solenoid Control Circuit
What P0803 Means
A fault exists in the 1-4 upshift (skip shift) solenoid control circuit used on manual transmissions to force an economy shift. The circuit may be open, shorted, or the solenoid failed.
Symptoms
- Skip shift light illuminated
- Check engine light on
- Forced upshift not working
Common Causes
- Faulty skip shift solenoid
- Open or short in control wiring
- Corroded or damaged connector
- Faulty PCM output driver
Diagnostic Steps
- Retrieve stored codes and freeze frame
- Inspect solenoid wiring and connector
- Measure solenoid resistance
- Verify PCM control signal and ground
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