P1804
Transmission 4-Wheel Drive High Indicator Circuit Failure
P1804 is an OBD-II diagnostic trouble code meaning: Transmission 4-Wheel Drive High Indicator Circuit Failure. Common causes: open or short circuit in the indicator circuit, 4wd indicator lamp malfunction. Estimated repair cost: $6–56.
Symptoms
- 4WD indicator does not light up on dashboard
- The 4WD indicator is constantly on even when the 4WD is turned off
- 4WD indicator flashes
- Other transmission warnings may appear on your dashboard
Causes
- Open or short circuit in the indicator circuit
- 4WD indicator lamp malfunction
- Problems with the wiring harness or connectors
- Transmission control module (TCM) malfunction
- Problems with the drive mode switch
How to Fix
- Check the condition of the 4WD indicator lamp
- Check the integrity of the wiring and connectors in the indicator circuit
- Check the voltage in the indicator circuit
- Scan the transmission control module for other errors
- If necessary, replace faulty components
Related codes
Error P1804 by Vehicle Brand
FAQ
What does the P1804 code mean?
P1804 is an OBD-II diagnostic trouble code that indicates: Transmission 4-Wheel Drive High Indicator Circuit Failure
What causes a P1804 error code?
The most common causes of P1804 include: Open or short circuit in the indicator circuit; 4WD indicator lamp malfunction; Problems with the wiring harness or connectors; Transmission control module (TCM) malfunction.
How do I fix a P1804 diagnostic trouble code?
To fix P1804: Check the condition of the 4WD indicator lamp. Check the integrity of the wiring and connectors in the indicator circuit. Check the voltage in the indicator circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1804?
Yes, but get it checked soon
How much does it cost to fix P1804?
The estimated repair cost for P1804 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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