Engine Starts Then Dies Immediately
The engine cranks and starts but then stalls within seconds. This pattern suggests a loss of fuel pressure, air intake issue, or security system fault. The 2020 Ford Explorer is known for fuel pump driver module failures and purge valve problems that can cause this symptom.
Diagnosis Details
Possible Causes
Faulty fuel pump driver module (FPDM) or fuel pump relay – intermittent power loss to the fuel pump after initial start.
Clogged or stuck-open purge valve (EVAP system) – causes massive vacuum leak after start, stalling the engine.
Security system (PATS) immobilizer malfunction – engine starts then shuts down due to anti-theft signal loss.
Related OBD-II Codes
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What You Should Do
Check fuel pressure immediately after start; if it drops rapidly, inspect the FPDM and relay.
Scan for diagnostic trouble codes (DTCs) to identify EVAP or immobilizer issues.
If no codes, test the purge valve operation and inspect the fuel pump driver module for corrosion or damage.
Related Repairs
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
