Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 2)
The P0029 code means the vehicle's onboard diagnostic system has detected: Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 2). This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $150 - $450 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Engine running rough at idle
- Reduced power output
- Increased emissions at tailpipe
Probable Causes (Ranked by Likelihood)
- Faulty exhaust valve control solenoid on Bank 2 Very High
- Dirty or insufficient engine oil High
- Damaged wiring harness to the solenoid Moderate
- Blocked oil passage to the solenoid Moderate
Frequently Asked Questions
What does P0029 mean?
P0029 means the exhaust valve control solenoid on Bank 2 is not performing within its expected range, which can affect valve timing and engine efficiency.
What causes P0029?
The most common causes are a faulty solenoid, dirty engine oil, or wiring problems in the solenoid circuit on Bank 2.
How do I fix P0029?
Start by checking the engine oil level and condition. If the oil is fine, inspect the solenoid wiring and test the solenoid itself. Replacement of the solenoid is the most common fix.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
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Retrieve and confirm P0029 code with a diagnostic scanner
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Inspect engine oil level and quality
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Check wiring and connector for the Bank 2 exhaust valve control solenoid
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Use bidirectional scan tool test to verify solenoid operation
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2007-2016 BMW 335i
- 2010-2018 BMW X5
- 2009-2017 Infiniti Q50
- 2008-2016 Nissan Maxima
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