P0804

Upshift/Skip Shift Lamp Control Circuit

Severity

✅ Low

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$3–17 (est.)

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

P0801 P0802 P0803