EGR Valve Position Sensor Performance (Ford: DPFE / EGR pintle-position circuit; also GM/Isuzu)
The P1406 code means the vehicle's onboard diagnostic system has detected: EGR Valve Position Sensor Performance (Ford: DPFE / EGR pintle-position circuit; also GM/Isuzu). This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- Varies — depends on the specific component this manufacturer-specific code points to on your vehicle. Diagnose before buying parts.
Manufacturer-specific code. P1406 is a manufacturer-specific DTC, so its exact definition can differ by make, model, and year. Use the meaning above as a general guide, and always confirm it against your vehicle manufacturer's official service information (or a make-specific scan tool) before diagnosing or replacing parts.
What Are the Symptoms of P1406?
- Check Engine or a related warning light on
- Exact symptoms depend on the specific system this code covers for your make
- A make-specific scan reveals which subsystem and circuit is involved
What Causes P1406? (Most Likely First)
- A fault in the specific component or circuit this code monitors (the exact part varies by manufacturer) High
- Damaged wiring, a corroded connector, or a poor ground in that circuit Moderate
- A related sensor or control module reporting or causing the fault Moderate
Can I Still Drive with P1406?
Yes, but fix soon. P1406 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.
Frequently Asked Questions
Does P1406 mean the same thing on every vehicle?
No. P1406 is a manufacturer-specific diagnostic trouble code, so its exact meaning varies by make, model, and year. Always confirm it against your vehicle manufacturer's service information before diagnosing or replacing parts.
What does P1406 most likely indicate?
EGR Valve Position Sensor Performance (Ford: DPFE / EGR pintle-position circuit; also GM/Isuzu). Treat this as a general guide and verify the specifics for your vehicle.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P1406?
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Confirm your exact make, model, and year first — P1406 is manufacturer-specific and can mean different things across brands.
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Read P1406 with an enhanced/make-specific scan tool and check your manufacturer's official service information for the precise definition and procedure.
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Inspect the wiring, connectors, and grounds for the indicated circuit before replacing any part.
P1406 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
Which Vehicles Commonly Get P1406?
- 2004-2014 Ford F-150
- 2005-2012 Ford Escape
- 2005-2010 Ford Explorer
- 2006-2012 Ford Fusion
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