Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1994F 250 2WD PICKUP V8-302 5.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSDD - EGR POSITION SENSOR/VACUUM SOLENOID/ATMOSPHERIC SOLENOIDDD10 - ATTEMPT TO GENERATE DTC 327
1994 Ford F 250 2WD Pickup V8-302 5.0L
DD10 - Attempt to Generate DTC 327
1994 Ford F 250 2WD Pickup V8-302 5.0LSECTION DD10 - Attempt to Generate DTC 327
Diagnostic Trouble Code (DTC) 337 indicates the EGR Position (EGRP) sensor signal is greater than the Self-Test maximum.
Possible causes:
- Open in EGRP sensor SIG circuit.
- Short to power in EGRP sensor SIG circuit.
- Damaged Powertrain Control Module (PCM).
- Damaged EGRP sensor / EGR valve assembly. Damaged EGR Vacuum (EGRV) solenoid valve.
- Improper EGR valve vacuum hose routing.
- Key "OFF".
- Disconnect EGRP sensor.
- Connect a jumper wire between the EGRP sensor SIG and SIG RTN circuits at the EGRP sensor vehicle harness connector.
- Rerun Key On Engine Off (KOEO) and Key On Engine Running (KOER) Self-Test. Quick Test Appendix (Detailed Testing Instructions)
- Is DTC 327 present (ignore all other DTCs)?
Yes -- Remove the jumper wire. Go to DD13. DD13 - Check For Vacuum at EGRV Solenoid Valve Output Port
No -- Reconnect EGRP sensor. Remove the jumper wire. Go to DD11. DD11 - Check Continuity of EGRP Sensor SIG Circuit
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.