P3400
Cylinder Deactivation System Bank 1
P3400 is an OBD-II diagnostic trouble code meaning: Cylinder Deactivation System Bank 1. Common causes: malfunction of cylinder deactivation solenoid valves, problems with the system wiring harness. Estimated repair cost: $28–167.
Symptoms
- Increased fuel consumption
- Rough engine idling
- Reduced engine power
- Check Engine Light Illuminates
- Cylinder deactivation system does not work
Causes
- Malfunction of cylinder deactivation solenoid valves
- Problems with the system wiring harness
- Malfunction of camshaft position sensors
- Mechanical damage to system components
- Problems with ECU software
How to Fix
- Check the condition of the system solenoid valves
- Diagnose the integrity of the wiring harness
- Check the operation of the camshaft position sensors
- Inspect the mechanical components of the system for damage
- Update ECU software if necessary
Related codes
Error P3400 by Vehicle Brand
FAQ
What does the P3400 code mean?
P3400 is an OBD-II diagnostic trouble code that indicates: Cylinder Deactivation System Bank 1
What causes a P3400 error code?
The most common causes of P3400 include: Malfunction of cylinder deactivation solenoid valves; Problems with the system wiring harness; Malfunction of camshaft position sensors; Mechanical damage to system components.
How do I fix a P3400 diagnostic trouble code?
To fix P3400: Check the condition of the system solenoid valves. Diagnose the integrity of the wiring harness. Check the operation of the camshaft position sensors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P3400?
Yes, but get it checked soon
How much does it cost to fix P3400?
The estimated repair cost for P3400 is $28–167. Actual cost depends on your vehicle, location, and labor rates.
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