P3456
Cylinder 7 Exhaust Valve Control Circuit High
P3456 is an OBD-II diagnostic trouble code meaning: Cylinder 7 Exhaust Valve Control Circuit High. Common causes: short circuit in control circuit, solenoid valve malfunction. Estimated repair cost: $17–89.
Symptoms
- Loss of engine power
- Increased fuel consumption
- Unstable engine operation
- Check Engine Light Is On
- Problems starting the engine
Causes
- Short circuit in control circuit
- Solenoid valve malfunction
- Wiring harness damage
- Problems with the engine control unit
- Contact corrosion
How to Fix
- Check the integrity of the control circuit
- Check the resistance of the solenoid valve
- Inspect the wiring harness for damage
- Check contacts for corrosion
- If necessary, replace faulty components
Related codes
Error P3456 by Vehicle Brand
FAQ
What does the P3456 code mean?
P3456 is an OBD-II diagnostic trouble code that indicates: Cylinder 7 Exhaust Valve Control Circuit High
What causes a P3456 error code?
The most common causes of P3456 include: Short circuit in control circuit; Solenoid valve malfunction; Wiring harness damage; Problems with the engine control unit.
How do I fix a P3456 diagnostic trouble code?
To fix P3456: Check the integrity of the control circuit. Check the resistance of the solenoid valve. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P3456?
Do not drive — repair immediately
How much does it cost to fix P3456?
The estimated repair cost for P3456 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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