The P0029 code signals a problem with the exhaust valve control solenoid circuit range/performance for Bank 2, indicating that the solenoid’s function is not within the expected parameters set by the engine control module (ECM).
This condition can cause various symptoms, including rough idle, lack of power, hesitation during acceleration, and stalling at low speeds. The code is critical for ensuring optimal engine performance, fuel efficiency, and emissions control.
P0029 quick overview
| Meaning | P0029 – Exhaust Valve Control Solenoid Circuit Range/Performance Bank 2 |
| Is it serious? | Yes, it can lead to significant engine performance issues, potentially affecting the vehicle’s drivability and emissions. |
| Possible causes | – Faulty exhaust valve control solenoid – Wiring or connector issues to the solenoid – Vacuum leaks in the intake and exhaust systems – Clogged or restricted exhaust system components |
| How to diagnose? | Inspect wiring and connectors for the exhaust valve control solenoid for any signs of damage or poor connections. Test the exhaust valve control solenoid to ensure it operates within the manufacturer’s specifications. Check for vacuum leaks in the intake and exhaust systems using a smoke test. Perform a compression test on Bank 2 cylinders to assess the engine’s mechanical health. |
P0029 Meaning
When a P0029 code is present, it highlights issues with the operation of the exhaust valve control solenoid on Bank 2, affecting the engine’s ability to efficiently manage exhaust flow and valve timing. This solenoid plays a crucial role in adjusting the exhaust valve’s timing to optimize engine performance and emissions.
Problems such as faulty solenoid operation, damaged wiring, or even mechanical issues like vacuum leaks and exhaust restrictions can impair the solenoid’s performance. Diagnosing this code requires a thorough examination of both the electrical aspects of the solenoid circuit and the mechanical operation of the exhaust valve control system.
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How to fix P0029 – learn from mechanics
I looked into P0029 service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.
Case #1: Ford P0029
Vehicle information 2014 Ford F-150 5.0L V8
Issue + repair history
- Experiencing rough idle and lack of power
- Previous repairs include replacing ignition coils and spark plugs
- Current symptoms: CEL on, code P0029
Other OBD2 Codes + Test Results
- P0029: Exhaust Valve Control Solenoid Circuit Range/Performance B2
- P0307: Cylinder 7 Misfire Detected
- Live data shows irregular exhaust valve control solenoid operation
Mechanic suggestions
- Inspect the exhaust valve control solenoid wiring and connectors
- Test the exhaust valve control solenoid for proper resistance and operation
- Check for vacuum leaks in the intake and exhaust systems
- Perform a compression test on Bank 2 cylinders
Final fix
- Replaced faulty exhaust valve control solenoid for Bank 2, addressed cylinder 7 misfire issue, cleared codes, problem resolved.
Case #2: Toyota P0029
Vehicle information 2016 Toyota Camry 3.5L V6
Issue + repair history
- Experiencing rough idle and hesitation during acceleration
- Previous repairs include replacing fuel injectors and mass airflow sensor
- Current symptoms: CEL on, code P0029
Other OBD2 Codes + Test Results
- P0029: Exhaust Valve Control Solenoid Circuit Range/Performance B2
- P0304: Cylinder 4 Misfire Detected
- Live data shows irregular exhaust valve control solenoid operation
Mechanic suggestions
- Inspect the exhaust valve control solenoid wiring and connectors
- Test the exhaust valve control solenoid for proper resistance and operation
- Check for clogged or restricted exhaust system components
- Perform a compression test on Bank 2 cylinders
Final fix
- Replaced faulty exhaust valve control solenoid for Bank 2, addressed cylinder 4 misfire issue, cleared codes, problem resolved.
Case #3: Chevrolet P0029
Vehicle information 2013 Chevrolet Silverado 1500 6.2L V8
Issue + repair history
- Experiencing rough idle and stalling at low speeds
- Previous repairs include replacing oxygen sensors and throttle body
- Current symptoms: CEL on, code P0029
Other OBD2 Codes + Test Results
- P0029: Exhaust Valve Control Solenoid Circuit Range/Performance B2
- P0300: Random/Multiple Cylinder Misfire Detected
- Live data shows irregular exhaust valve control solenoid operation
Mechanic suggestions
- Inspect the exhaust valve control solenoid wiring and connectors
- Test the exhaust valve control solenoid for proper resistance and operation
- Check for exhaust system leaks or restrictions
- Perform a compression test on Bank 2 cylinders
Final fix
- Replaced faulty exhaust valve control solenoid for Bank 2, addressed random cylinder misfire issue, cleared codes, problem resolved.
How to diagnose P0029
I made you an overview of solving this DTC, based on all the advice that was suggested by certified mechanics to address this issue in previously mentioned service cases.
| Diagnostic Step | Explanation |
|---|---|
| Inspect wiring and connectors | Look for damage or poor connections in the solenoid’s electrical circuit. |
| Test solenoid operation | Verify that the solenoid functions within specified ranges. |
| Check for vacuum and exhaust leaks | Identify any leaks that could affect engine performance. |
| Perform a compression test | Assess the engine’s mechanical health and uncover any internal issues. |
Car Diagnostics Training
- Car Electrical basics
- OBD-II scanner basics
- How to use an OBD reader
- Introduction to a Bi-directional Scan tool
- OBD scanner buyer’s guide + discounts
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko