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P1401 Diagnostic Trouble Code Discussion for July 2004

EGR Temperature Sensor Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1401
Help Request Posted
1995 Ford Ranger Splash 4.0L MIL Lamp on VIN: 1FTCR14X6S
P1401: DPFE Signal Voltage too high. ... input on this problem vehicle. Vehicle has failed the CA smog test due to MIL on and high NOX emissions. Verified EGR code P1401 - Hence, EGR has been disabled by ECU. Performed the troubletree Chart procedures and replaced the ECU. Code comes back. Perfor...
July 22, 2004