P3432Cylinder 4 Exhaust Valve Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P3432 is the last code of the cylinder 4 block and denotes an exhaust actuator control line sitting at supply voltage. No manufacturer documents this code publicly. The intake-side counterpart P3428 is well covered: For GM's L84, L86 and Corvette LT4 of model year 2019, a supply path below half an ohm, measured while the low-side stage conducts, is logged as a Type B short. Exhaust valves are not forgotten in those engines, they simply switch with the same lifter oil. A GM patent application lets a single hydraulic valve serve both sides, and the cam timing makes the exhaust side drop out earlier than the intake side and also come back sooner. Without a separate exhaust output, this code has nothing to watch. Expect only the lamp.
- What you may notice
- Check engine lamp on
- Deactivation unavailable
- Likely causes
- PossibleExhaust actuator wire of cylinder 4 in contact with battery voltage
- PossibleExhaust actuator coil with shorted windings
- RareOutput stage of the engine control module defective
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.