Powertrain
generic / SAE
P0803
Upshift/Skip Shift Solenoid Control Circuit
General electrical fault on the upshift/skip-shift solenoid control circuit — used on manual-transmission performance vehicles to force a skip from 1st straight to 4th under low-load cruise (CAFE fuel-economy feature). With the input invalid the lockout cannot be applied.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 03
Possible causes
- Open or shorted control wire high
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
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–350 €
- Estimated time: 0.4–1.5 h
- Component: skip shift solenoid
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012