Possible Causes
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes are:
- FTP circuit open.
- FTP shorted to VREF or VPWR.
- VREF shorted to VPWR.
- SIG RTN circuit open.
- Damaged FTP sensor.
- Damaged PCM.