P340C

Symptoms

• Check Engine light comes on
• Decreased fuel economy
• Unstable engine operation
• The engine runs intermittently
• Power Loss

Causes

• Faulty cylinder deactivation control solenoid valve
• Open or short circuit in control circuit wiring
• Poor connection in control circuit connectors
• Engine control module (ECU) malfunction
• Mechanical problems with exhaust valve

How to Fix

1. Check wiring and connectors for damage or corrosion.
2. Check the cylinder deactivation control solenoid valve.
3. Check the voltage and resistance in the control circuit.
4. Check the engine control module (ECU) for errors or damage.
5. Replace faulty components.

Related codes

Error P340C by Vehicle Brand