P1800
Transmission Clutch Interlock Safety Switch Circuit Failure
P1800 is an OBD-II diagnostic trouble code meaning: Transmission Clutch Interlock Safety Switch Circuit Failure. Common causes: clutch safety switch malfunction, open or short circuit in the circuit. Estimated repair cost: $6–28.
Symptoms
- The engine does not start, even with the clutch depressed
- Gears change without pressing the clutch pedal
- Check Engine Light Is On
- Possible problems with gear shifting
- The car may go into emergency mode
Causes
- Clutch safety switch malfunction
- Open or short circuit in the circuit
- Poor contact in connectors
- Problems with the transmission control unit
- Mechanical damage to wiring
How to Fix
- Check the condition of the clutch safety switch
- Check the integrity of the circuit and wiring harness
- Clean connector contacts
- Check the operation of the transmission control unit
- Replace the safety switch if necessary
Related codes
Error P1800 by Vehicle Brand
FAQ
What does the P1800 code mean?
P1800 is an OBD-II diagnostic trouble code that indicates: Transmission Clutch Interlock Safety Switch Circuit Failure
What causes a P1800 error code?
The most common causes of P1800 include: Clutch safety switch malfunction; Open or short circuit in the circuit; Poor contact in connectors; Problems with the transmission control unit.
How do I fix a P1800 diagnostic trouble code?
To fix P1800: Check the condition of the clutch safety switch. Check the integrity of the circuit and wiring harness. Clean connector contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1800?
Limited driving only, diagnose soon
How much does it cost to fix P1800?
The estimated repair cost for P1800 is $6–28. Actual cost depends on your vehicle, location, and labor rates.
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