337 EGR valve position or pressure feedback EGR circuit above maximum voltage
How to read it
Code 337 reads as 3 flashes, pause, 3 flashes, pause, 7 flashes on the check-engine light. Jumper the self-test input to signal return at the test connector, then run the key on engine off self test and the running self test, counting the check-engine flashes each time.
New to flash codes? The OBD-I code reading guide walks through the paperclip method, code 12, and reading two-digit codes.
What does Ford code 337 mean?
337. EGR valve position or pressure feedback EGR circuit above maximum voltage. This code sets when your vehicle computer detects egr valve position or pressure feedback egr circuit above maximum voltage.
Common causes of 337
- Faulty EGR valve position sensor
- Carbon holding the EGR valve open or closed
- Plugged EGR pressure feedback tube or port
- Open or shorted wiring in the EGR circuit
- Faulty PCM EGR control
How to fix 337
- Confirm the code and read the flash sequence again
- Inspect the EGR valve and its passages for carbon
- Test the EGR valve position sensor through its travel
- Repair a plugged tube or damaged wiring before replacing parts
- Replace the valve or sensor only after the tests