What Does P3432 Mean?
The ECM has detected an abnormally high voltage in the exhaust valve control solenoid circuit for cylinder 4. This code is associated with cylinder deactivation systems (Active Fuel Management/Multi-Displacement System) where the ECM commands individual valves to deactivate cylinders for fuel savings. A high circuit condition indicates the solenoid driver voltage exceeded the expected threshold, preventing proper exhaust valve control on cylinder 4.
Common Causes
35%
Short to voltage in the cylinder 4 exhaust valve solenoid control wiring harness
30%
Failed cylinder 4 exhaust valve solenoid (internal short)
20%
ECM driver circuit failure for cylinder 4 exhaust valve control
15%
Corroded or damaged connector pins at the solenoid or VLOM assembly
Diagnostic Steps
1
Step 1: Access the cylinder 4 exhaust valve solenoid connector at the valve lifter oil manifold (VLOM). With KOEO, measure voltage on the solenoid control wire — it should read near 0V when not commanded. A reading above 5V confirms the high circuit condition.
2
Step 2: Disconnect the solenoid connector and measure resistance across the solenoid terminals. Expect 5-12 ohms depending on manufacturer. An open reading or significantly low resistance indicates a failed solenoid.
3
Step 3: With the solenoid disconnected, check for voltage on the ECM-side of the harness connector. If voltage is still present, inspect the harness for a short to battery voltage from adjacent wiring.
4
Step 4: Using a DVOM, check continuity and isolation of the solenoid wiring from the ECM connector to the VLOM. Verify no short to B+ or other circuits exists in the harness routing area near the engine.
5
Step 5: If wiring and solenoid test good, command the solenoid on/off using bi-directional scan tool controls while monitoring current draw. If the ECM cannot control the circuit, suspect ECM driver failure.
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The ECM has detected an abnormally high voltage in the exhaust valve control solenoid circuit for cylinder 4. This code is associated with cylinder deactivation systems (Active Fuel Management/Multi-Displacement System) where the ECM commands individual valves to deactivate cylinders for fuel saving...
The most common cause of P3432 (Cylinder 4 Exhaust Valve Control Circuit High) is: Short to voltage in the cylinder 4 exhaust valve solenoid control wiring harness
Typical repair costs for P3432 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is generally safe to drive but will operate with reduced fuel economy and potential rough running. The cylinder deactivation feature will be disabled, and the engine may exhibit increased vibration at cruising speeds.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3432 to identify the root cause.
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Quick Info
Category
Powertrain
System
Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
Recommended Tools
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