P0804
Upshift/Skip Shift Lamp Control Circuit
P0804 is an OBD-II diagnostic trouble code meaning: Upshift/Skip Shift Lamp Control Circuit. Common causes: open or short circuit in the lamp circuit, malfunction of the lamp itself. Estimated repair cost: $3–17.
Symptoms
- Gear shift lamp does not light up
- Gear shift lamp stays on constantly
- Gear shift lamp flashes
- Incorrect shift hints
- Increased fuel consumption
Causes
- Open or short circuit in the lamp circuit
- Malfunction of the lamp itself
- Problems with the control module
- Wiring harness damage
- Bad contacts in connectors
How to Fix
- Diagnose the shift lamp circuit
- Check the condition of the lamp and its connections
- Inspect the wiring harness for damage
- Check contacts in connectors
- If necessary, replace the lamp or repair the wiring
Related codes
Error P0804 by Vehicle Brand
FAQ
What does the P0804 code mean?
P0804 is an OBD-II diagnostic trouble code that indicates: Upshift/Skip Shift Lamp Control Circuit
What causes a P0804 error code?
The most common causes of P0804 include: Open or short circuit in the lamp circuit; Malfunction of the lamp itself; Problems with the control module; Wiring harness damage.
How do I fix a P0804 diagnostic trouble code?
To fix P0804: Diagnose the shift lamp circuit. Check the condition of the lamp and its connections. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0804?
Yes, but get it checked soon
How much does it cost to fix P0804?
The estimated repair cost for P0804 is $3–17. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat