• Check Engine Light is on
• Reduced engine performance
• Increased emissions
• Faulty exhaust valve actuator
• Short circuit in the wiring
• Poor electrical connection
ECM: Engine Control Module
Actuator: A device that causes a machine or other device to operate
• P3431
• P3433
Cylinder 4 Exhaust Valve Control Circuit High
This code means that the car's computer has detected a problem with the control circuit for the exhaust valve in cylinder 4. It's like a light switch that isn't working properly, so the valve might not open or close as it should.
The engine control module (ECM) monitors the exhaust valve control circuit for each cylinder. If it detects a voltage that is higher than expected in the circuit for cylinder 4, it triggers the P3432 code.
P3432 indicates that the ECM has detected a high voltage condition in the exhaust valve control circuit for cylinder 4. This could be due to a short circuit, a faulty actuator, or an issue with the wiring or connectors. The exhaust valve control circuit is responsible for controlling the timing and operation of the exhaust valve, which is crucial for engine performance and emissions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for cylinder 4's exhaust valve.
• Test the exhaust valve actuator for proper operation.
• Replace the faulty exhaust valve actuator.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular maintenance and inspection of the engine wiring.
• Ensure proper engine oil levels and quality.
• Avoid excessive engine loads.
Engine Performance
• Avoid driving the vehicle until the issue is fixed to prevent further damage.
• Consult with a professional mechanic for a proper diagnosis.
Check with your vehicle manufacturer for warranty coverage on engine components.
This code has been associated with vehicles that utilize cylinder deactivation technology, which can be prone to electrical issues in the valve control circuits.
Moderate – The vehicle may still be drivable, but it is recommended to address the issue to prevent further engine damage.
Driving with a malfunctioning exhaust valve can lead to increased emissions and potential engine damage, which may not comply with emission regulations.
• Engine at operating temperature
• Vehicle in park or neutral
The exhaust valve actuator for cylinder 4 is typically located on the engine's cylinder head, near the exhaust manifold.
Q: Can I drive my car with a P3432 code?
A: It's not recommended to drive for long periods with this code, as it can lead to engine damage and increased emissions.
Q: How do I know if my exhaust valve actuator is faulty?
A: A mechanic can test the actuator for proper operation using a multimeter and other diagnostic tools.
