P0029

Symptoms

• Unstable engine idling
• Reduced power and acceleration dynamics
• Increased fuel consumption
• Check Engine Light Illuminates
• Difficulty starting the engine
• Rough engine operation when accelerating

Causes

• Faulty exhaust valve control solenoid
• Open or short circuit in solenoid wiring
• Contamination of oil channels of the VVT system
• Low engine oil pressure
• Using poor quality or contaminated oil
• Engine control module (ECM) malfunction
• Mechanical damage to the VVT drive

How to Fix

1. Connect a diagnostic scanner and read all error codes
2. Check the level and quality of the engine oil, replace if necessary
3. Visually inspect the solenoid wiring for damage.
4. Measure the solenoid resistance with a multimeter (should be within specification)
5. Check the supply voltage at the solenoid connector with the engine running.
6. Remove and clean the solenoid from dirt and deposits
7. Check solenoid operation using diagnostic equipment
8. If necessary, replace the faulty solenoid
9. Clear error codes and test drive to see if the problem is resolved

Related codes

Error P0029 by Vehicle Brand