P0029 – Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 2)
The P0029 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected an abnormal operating range or performance in the exhaust valve control solenoid circuit on Bank 2. This fault is related to the Variable Valve Timing (VVT) system and is typically caused by electrical, hydraulic, or mechanical issues affecting exhaust camshaft control.
Symptoms of P0029
- Check Engine Light illuminated.
- Reduced engine power.
- Poor acceleration.
- Rough or unstable idle.
- Increased fuel consumption.
- Engine hesitation.
- Possible engine stalling in severe cases.
Common Causes
- Faulty exhaust VVT oil control solenoid.
- Dirty, low, or incorrect engine oil.
- Restricted oil passages.
- Damaged wiring or loose electrical connectors.
- Faulty camshaft position sensor.
- Stretched timing chain or incorrect valve timing.
- Internal ECM malfunction (rare).
How to Diagnose P0029
- Check the engine oil level, quality, and viscosity.
- Scan for additional diagnostic trouble codes.
- Inspect the exhaust valve control solenoid and its electrical connector.
- Measure the solenoid resistance according to manufacturer specifications.
- Monitor VVT operation using a diagnostic scan tool.
- Inspect the timing chain and valve timing if necessary.
- Check the wiring harness for shorts, opens, or corrosion.
Possible Repairs
- Replace the engine oil and oil filter.
- Replace the faulty exhaust VVT oil control solenoid.
- Repair damaged wiring or loose electrical connections.
- Clean restricted oil passages.
- Replace a faulty camshaft position sensor.
- Repair or replace worn timing chain components.
Can You Drive With Code P0029?
Driving with code P0029 is not recommended. Continued driving may reduce engine performance, increase fuel consumption, and eventually damage the VVT system or engine timing components.
Estimated Repair Cost
- Oil and filter change: $30–$100
- VVT oil control solenoid replacement: $100–$350
- Camshaft position sensor replacement: $50–$250
- Timing chain replacement: $600–$2,500
Related Trouble Codes
- P0026 – Intake Valve Control Solenoid Circuit Range/Performance (Bank 1)
- P0027 – Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 1)
- P0028 – Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)
- P0024 – Exhaust Camshaft Timing Over-Advanced (Bank 2)
- P0025 – Exhaust Camshaft Timing Over-Retarded (Bank 2)