DTC Set Criteria
- Intake air temperature is more than 41°F (5°C). Engine speed is 1600 RPM or more. Volumetric efficiency is 25-80 percent. Vehicle speed is 19 MPH or more. Evaporative Emission (EVAP) purge solenoid is driven at 100 percent duty cycle when intake air temperature is 41-113°F (5-45°C). Code will set if Fuel Tank Differential Pressure (FTDP) sensor output voltage is 4 volts or more for 10 seconds.
- Intake air temperature is more than 41°F (5°C). Engine speed is 1600 RPM or more. Volumetric efficiency is 20-80 percent. Vehicle speed is 19 MPH or more. EVAP purge solenoid is NOT driven when intake air temperature is 41°F (5°C) or more. Code will set if FTDP sensor output voltage is less than one volt for 10 seconds.
- Closed throttle position switch is on. Vehicle speed is less than one MPH. PCM is looking for electrical noise on FTDP sensor circuit. Code will set if rapid voltage changes equal to 20 or more spikes of 200 millivolts or more in 25 millisecond averaged blocks occur.