P04D2
EGR Temperature Sensor C Circuit Intermittent/Erratic
Generic OBD-II
Common symptoms
What you'll notice
- Check the EGR temperature sensor wiring for any loose or damaged connections
- Inspect the EGR temperature sensor for any signs of damage or corrosion and replace if necessary
- Clean the EGR valve and the intake manifold to remove any carbon buildup or debris
- Check the EGR system for any vacuum leaks and repair if necessary
- Reset the vehicle's ECM (engine control module) to clear any intermittent error codes
Common causes
Most likely first
- Loose or damaged wiring connections to the EGR temperature sensor
- Malfunctioning EGR temperature sensor
- Issues with the EGR valve
- Faulty EGR control module
- Problems with the engine coolant temperature sensor
How to diagnose & fix
Work through it in order
- Engine misfires or stumbles
- Decreased power and acceleration
- Rough idle or stalling
- Increased fuel consumption
- Check Engine Light (CEL) illuminated
Read & clear P04D2 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.