P0029 Exhaust Valve Control Solenoid Circuit Range/Performance Bank 2

P0029 indicates exhaust valve control solenoid range/performance on bank 2. The exhaust valve timing control response does not match command.

Code details

Generic OBD-II · P0

System: Fuel / Air
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not diagnose this from resistance alone; range/performance faults require checking commanded and actual timing response.

Symptoms of P0029

Check-engine light on, sometimes with rough or uneven running.
Hesitation, surging, or a noticeable change in fuel economy.
Occasionally hard starting or a smell of unburnt fuel.

Common causes of P0029

A failing or contaminated sensor (MAF, MAP, oxygen or air-fuel sensor).
Intake or vacuum leaks, or an exhaust leak near an upstream sensor.
Wiring, connector, or fuel-delivery problems that skew the reading.

Useful checks before replacing parts

Monitor exhaust valve control command, actual cam timing, oil pressure, oil temperature, engine load, and RPM when the code sets.
Inspect the exhaust control solenoid, connector fit, oil contamination, solenoid screens, wiring voltage drop, and cam actuator behavior.
Review related VVT, oil pressure, and crank/cam correlation codes to separate electrical, oil-control, and mechanical faults.

Related OBD-II codes

These nearby fuel / air entries can help compare wording and pin down the fault area.