Check Engine Light Illuminated, No Driving Issues Noticed on Ford E-150

The Check Engine Light may come on with no driving issues noticed. If P0401, P0402, P1400 and / or P1401 are in memory, the Delta Pressure Feedback Exhaust Gas Recirculation (DPFE) sensor is at fault. The DPFE sensor should be replaced.

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Average mileage: 104,500 (89,000–120,000)
3 model years affected: 1995, 2001, 2002
4 people reported this problem
problem details
1995 Ford E-150 120,000 mi,
Check engine light comes on while ascending mountain roads. Goes off after reaching ascent. Check engine comes on intermittently for no known reason. always checks out okay with no problems when taken to dealer. Purchased new. Problem since day one. CA emissions pkg