Possible Causes
WARNING: This page is about a different car, the 2003 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes are:
- Damaged FTP sensor.
- Damaged PCM.
- FTP circuit shorted to VREF or VPWR circuits.
- Fuel tank pressure circuit open.
- SIG RTN circuit open.
- VREF circuit shorted to VPWR circuit.