DTC P0451: EVAP Circuit, Pressure Sensor Range/Performance Problem: Condition
WARNING: This page is about a different car, the 2002 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when ECM (PCM) detects fuel tank pressure is less than -3.5 kPa or more than 6.6 kPa for 5 seconds. MIL is illuminated when ECM (PCM) detects malfunction during 2 consecutive drive cycles. Possible causes are:
- Fuel Tank Pressure (FTP) sensor malfunction.
- ECM (PCM) malfunction.