Detection Condition
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.
- DTC P0451 indicates fuel tank pressure changes more than 14 in. H2O in 0.10 seconds (sensor circuit noisy).
- DTC P0461 indicates fuel level input noisy.
Fuel Tank Pressure (FTP) sensor measures fuel tank pressure during EVAP monitor test and to control excessive fuel tank pressure by forcing a system purge. Fuel level input indicates fuel level in tank with a hard wire signal input to PCM from fuel pump module.