P1CB4
Gear Shift Actuator 4 Engage Failure
P1CB4 is an OBD-II diagnostic trouble code meaning: Gear Shift Actuator 4 Engage Failure. Common causes: malfunction of the 4th gear actuator, problems with wiring to the actuator. Estimated repair cost: $56–278.
Symptoms
- Shifting to 4th gear is impossible or difficult
- The gearbox goes into emergency mode
- Jerking when trying to shift into 4th gear
- Check Engine light comes on
- Reduced acceleration dynamics
Causes
- Malfunction of the 4th gear actuator
- Problems with wiring to the actuator
- Low or contaminated transmission fluid
- Transmission control module (TCM) malfunction
- Mechanical damage inside the gearbox
How to Fix
- Check the level and condition of the transmission fluid
- Diagnose the condition of the 4th gear actuator
- Check the integrity of wiring and connectors
- Scan TCM memory for other errors
- If necessary, replace the faulty actuator
Related codes
FAQ
What does the P1CB4 code mean?
P1CB4 is an OBD-II diagnostic trouble code that indicates: Gear Shift Actuator 4 Engage Failure
What causes a P1CB4 error code?
The most common causes of P1CB4 include: Malfunction of the 4th gear actuator; Problems with wiring to the actuator; Low or contaminated transmission fluid; Transmission control module (TCM) malfunction.
How do I fix a P1CB4 diagnostic trouble code?
To fix P1CB4: Check the level and condition of the transmission fluid. Diagnose the condition of the 4th gear actuator. Check the integrity of wiring and connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1CB4?
Limited driving only, diagnose soon
How much does it cost to fix P1CB4?
The estimated repair cost for P1CB4 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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