Ford 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.

What does Ford code 337 mean?

EGR valve position or pressure feedback EGR circuit above maximum voltage

Common causes of 337

• Incorrect hose routing
• Wiring short circuit
• Signal wire open circuit
• Exhaust gas pressure sensor
• EGR solenoid/valve
• ECM

How to fix 337

1. Check the vacuum hoses for damage, a blockage or a wrong connection
2. Check the circuit wiring and harness for damage, chafing or a poor splice
3. Check for signal wire open circuit
4. Test the exhaust gas pressure sensor and replace it only if it fails its own test
5. Test the EGR solenoid/valve and replace it only if it fails its own test
6. Test the ECM last, only after every circuit test has passed
7. Clear the code, then retest to confirm the fix holds

Source

Qualified source review