P34A9

Symptoms

• The Check Engine light comes on
• Reduced engine power
• Unstable operation at idle
• Deteriorating fuel economy
• Noises from the timing zone when the engine is running

Causes

• VVT actuator temperature sensor malfunction
• Open or short circuit in the sensor circuit
• Poor contact in the sensor connector
• Low or contaminated engine oil level
• VVT actuator mechanical failure

How to Fix

1. Check the level and condition of the engine oil
2. Diagnose the temperature sensor circuit
3. Check sensor connectors and contacts
4. Replace VVT actuator temperature sensor
5. If necessary, replace the VVT actuator

Related codes

Error P34A9 by Vehicle Brand