P34C4

Symptoms

• Check Engine light comes on
• Reduced engine power
• Unstable operation at idle
• Increased fuel consumption
• Rattling sound from the phase shifter area

Causes

• Short circuit in the phase shifter control circuit
• VVT solenoid valve malfunction
• Mechanical jamming of the phase shifter
• Wiring Harness Problems
• Engine control unit malfunction

How to Fix

1. Check resistance and continuity of control circuit
2. Inspect the VVT solenoid valve for damage.
3. Check the mechanical part of the phase shifter
4. Inspect the wiring harness for damage
5. If necessary, replace the solenoid valve or phase shifter

Related codes

Error P34C4 by Vehicle Brand