P1806
Transmission 4-Wheel Drive High Indicator Short Circuit To Battery
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$6–56 (est.)
Symptoms
- All-wheel drive indicator is constantly on
- All wheel drive indicator does not work
- Incorrect operation of the 4WD indicator
- Check engine light comes on
- The error is registered in the ECU memory
Causes
- Short circuit in the indicator circuit to battery positive
- Wiring harness damage
- Four-wheel drive switch malfunction
- Indicator relay problems
- Transmission control module (TCM) malfunction
How to Fix
- Check the condition of the fuses associated with the 4WD circuit
- Visually inspect the wiring harness for damage.
- Check the resistance of the indicator circuit
- Test the four-wheel drive switch
- Replace damaged components if necessary