Powertrain
generic / SAE
P0804
Upshift/Skip Shift Lamp Control Circuit
General electrical fault on the upshift/skip-shift indicator lamp control circuit — the dashboard light that prompts the driver to skip from 1st straight to 4th. With the input invalid the lamp cannot be illuminated.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 04
Possible causes
- Open or shorted lamp wire high
- Failed lamp bulb or LED medium
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: easy
- DIY: possible
- Estimated cost: 40–200 €
- Estimated time: 0.2–1 h
- Component: skip shift lamp
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012