328 EGR valve position sensor closed valve voltage lower than expected
How to read it
Code 328 reads as 3 flashes, pause, 2 flashes, pause, 8 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 328 mean?
328. EGR valve position sensor closed valve voltage lower than expected. This code sets when your vehicle computer detects egr valve position sensor closed valve voltage lower than expected.
Common causes of 328
- Wiring
- EGR valve/position sensor
- ECM
How to fix 328
- Check the circuit wiring and harness for damage, chafing or a poor splice
- Test the EGR valve/position sensor and replace it only if it fails its own test
- Test the ECM last, only after every circuit test has passed
- Clear the code, then retest to confirm the fix holds