P3437Cylinder 5 Exhaust Valve Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P3437 is reserved for an open circuit in a separate exhaust valve actuator on cylinder 5. No manufacturer documents this code publicly. GM, the main user of cylinder 5 deactivation codes (2007 V6, 3.6 L V6, L84 V8), only publishes the intake-side group P3433 to P3436, because its systems switch both valves of a cylinder together; NHTSA's description of Dynamic Fuel Management states that each solenoid feeds intake and exhaust lifters. CARB still expects any emission-relevant actuator to be checked for continuity, which is what this code would report. P3438 to P3440 are the other exhaust codes for cylinder 5, P3433 the intake-side open.
- What you may notice
- Check engine lamp on
- Cylinder deactivation locked out
- Likely causes
- PossibleBroken wire or connector to the cylinder 5 exhaust actuator
- PossibleOpen actuator coil
- RareEngine control module driver fault
- 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.