DTC P0451: Fuel Tank Pressure Sensor, Performance Problem: Condition

Powertrain Control Module (PCM) detects not enough or too much fuel tank pressure difference when operating evaporative leak monitor or closing purge solenoid valve. This is a continuous monitor. MIL is illuminated when Powertrain Control Module (PCM) detects malfunction during 2 consecutive drive cycles. Possible causes are:

• Fuel Tank Pressure (FTP) sensor malfunction.
• Purge solenoid valve malfunction.
• Canister Drain Cut Valve (CDCV) malfunction.
• Poor connection at CDCV, fuel tank pressure sensor or PCM.
• Short in wiring.
• Plugged charcoal canister malfunction.