What Does P3435 Mean?
The ECM has detected an abnormally low voltage in the cylinder 5 intake valve deactivation solenoid control circuit. This indicates the circuit voltage is below the expected threshold, which could be caused by a short to ground in the wiring or a failed solenoid. The cylinder deactivation system cannot properly control the intake valve on cylinder 5.
Common Causes
40%
Short to ground in the cylinder 5 intake valve solenoid wiring harness
30%
Internally shorted cylinder 5 intake valve deactivation solenoid coil
20%
Water intrusion or corrosion at the VLOM connector causing low-resistance path to ground
10%
ECM ground-side driver stuck on or damaged
Diagnostic Steps
1
Step 1: Disconnect the cylinder 5 intake valve solenoid at the VLOM connector. Clear the code and check if it immediately returns with KOEO. If the code clears with the solenoid disconnected, the solenoid is likely shorted internally.
2
Step 2: Measure solenoid coil resistance — expect 5-12 ohms. A very low reading (under 3 ohms) confirms an internal short in the solenoid coil.
3
Step 3: With the solenoid disconnected, measure resistance from each solenoid harness wire to chassis ground. Any reading under 10K ohms indicates a short to ground in the wiring.
4
Step 4: Inspect the wiring harness routing from the VLOM to the ECM for chafed insulation, pinched wires, or heat damage from exhaust components.
5
Step 5: If wiring is intact and solenoid resistance is normal, monitor the ECM driver output with a lab scope to verify the ECM is not erroneously commanding the circuit low.
Estimated Repair Cost
$100 - $650
Parts + labor, varies by vehicle and location
The ECM has detected an abnormally low voltage in the cylinder 5 intake valve deactivation solenoid control circuit. This indicates the circuit voltage is below the expected threshold, which could be caused by a short to ground in the wiring or a failed solenoid. The cylinder deactivation system can...
The most common cause of P3435 (Cylinder 5 Deactivation/Intake Valve Control Circuit Low) is: Short to ground in the cylinder 5 intake valve solenoid wiring harness
Typical repair costs for P3435 range from $100 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but the cylinder deactivation feature will be disabled. A persistent short could potentially cause excessive current draw on the ECM driver circuit, so repair should not be delayed indefinitely.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3435 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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