Originally Posted by Zeppo
I'm a newbee and just posted a thread looking for some help diagnosing a problem in the evap control system of my '00 Civic Ex. I was looking for a system discription, location of the pressure sensor and specs on the pressures in the system. For more info see Trouble shooting Evap System MIL P1457 (or something like that) in the Civic forum. Your help would be much appreciated.
Shame on you - there's a TSB for this and I spent 2 mins gathering info before I found it. I'll post everything on Civic EVAP systems anyway.
Evaporative Emission (EVAP) Purge Control Solenoid Valve*9
When the engine coolant temperature is above 154 °F (68 °C) , the ECM/PCM controls the EVAP purge control solenoid valve which controls vacuum to the EVAP purge control canister.
Evaporative Emission (EVAP) Purge Control Solenoid Valve*4
When the engine coolant temperature above 154 °F (68 °C) , intake air temperature above 32 °F (0 °C) and vehicle speed above 0 mile (0 kph) or [A/C compressor clutch on and intake air temperature above 160 °F (41 °C)] , the ECM/PCM controls the EVAP purge control solenoid valve which controls vacuum to the EVAP purge control canister.