Faulty exhaust valve control solenoid or actuator; Wiring damage (open, short, or corrosion) in the circuit between the PCM and the valve actuator; Sticking or carbon-fouled exhaust valve mechanism; Failed valve position sensor or feedback circuit; Low engine oil pressure or sludge affecting hydraulic valve control; PCM software glitch or internal driver failure (less common)

DTC codes / P34xx · Auxiliary emission controls / P3422

P3422Cylinder 3 Exhaust Valve Control Performance

Q: What does code P3422 mean?

Cylinder 3 Exhaust Valve Control Performance. P3422 indicates that the powertrain control module (PCM) has detected a performance issue with the exhaust valve control system for cylinder 3, meaning the valve is not opening or closing as commanded. The PCM monitors the valve's response through electrical feedback or position sensors and sets this code when the actual behavior deviates from the expected profile.

P3422 indicates that the powertrain control module (PCM) has detected a performance issue with the exhaust valve control system for cylinder 3, meaning the valve is not opening or closing as commanded. The PCM monitors the valve's response through electrical feedback or position sensors and sets this code when the actual behavior deviates from the expected profile.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaAuxiliary emission controls

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Rough idle or misfire sensation, especially when the engine is cold
Reduced engine power or sluggish acceleration due to impaired exhaust flow
Increased fuel consumption from inefficient combustion
Audible ticking or tapping from the valve cover area if the actuator is failing
In rare cases, a no-start condition if the valve remains stuck closed

Common causes, most likely first

Faulty exhaust valve control solenoid or actuator
Wiring damage (open, short, or corrosion) in the circuit between the PCM and the valve actuator
Sticking or carbon-fouled exhaust valve mechanism
Failed valve position sensor or feedback circuit
Low engine oil pressure or sludge affecting hydraulic valve control
PCM software glitch or internal driver failure (less common)

How to diagnose and fix it

Perform a visual inspection of the valve actuator, connectors, and wiring for damage or corrosion
Check for related diagnostic trouble codes (DTCs) and freeze-frame data to confirm the fault conditions
Test the actuator with a bidirectional scan tool to command the valve and observe its operation
Measure resistance and voltage on the actuator circuit to rule out electrical faults
Inspect and clean the exhaust valve mechanism if accessible, removing carbon deposits
Replace the exhaust valve control solenoid or actuator if testing indicates failure
Reprogram or replace the PCM only after all other causes have been eliminated

Common misdiagnosis traps for P3422

A misfire code for cylinder 3 is often stored alongside P3422, leading some technicians to replace ignition components when the root cause is actually the exhaust valve control.
The exhaust valve control system may share wiring with other cylinder valve actuators, so a single damaged wire can set multiple codes and mimic a more widespread failure.
Carbon buildup on the valve stem can cause intermittent sticking that only occurs under certain temperature or load conditions, making the code appear and disappear.
Low oil pressure or degraded oil can impair hydraulic valve actuators, so always check oil condition and pressure before condemning electrical parts.
After repairs, the PCM may require a relearn procedure or several drive cycles before the code clears and monitors run complete.

Can I keep driving with P3422?

You can usually drive the vehicle short distances to a repair shop, but avoid heavy acceleration or towing because the impaired exhaust valve can cause misfires and potential catalytic converter damage. If the engine runs very rough or loses significant power, stop driving and seek professional assistance.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.