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'Service Engine Soon' > Throwing code P0444 ' Purge control valve circuit open ? '
Well had a fun trip up North this weekend, and came home on a 'Service Engine Soon' Light which didn't flash but stayed on solid, stopped at one point then came back. Checked the tank cap, it was on tight - so today I had them run the OBD II scanner on her, and I have code P0444 (Evaporative Emission Control System Purge Control Valve Circuit Open) Anyone know what this means?
only info i've found so far is this:
Purge valve
The purge valve is located on the right hand side of the engine (when viewed from the front of the vehicle). It forms part of the evaporative loss control system (ELC) and is situated in the line between the charcoal canister and the manifold. The purge valve controls the amount of air/fuel vapour drawn from the canister into the engine. The other components incorporated into the ELC system are:
The charcoal canister, which is located on the right hand inner chassis rail by the hand-brake drum
The fuel tank pressure sensor (NAS only), located in the fuel sender unit
The intake manifold
The ECM controls the amount of vapour drawn from the charcoal canister by controlling the length of time the purge valve is open. It controls the length of time it is open by supplying the purge valve with a PWM voltage. Control is used to maintain the required level of emissions, as a hydrocarbon vapour level of 1% can affect the air/fuel ratio by as much as 20%.
The ECM can diagnose faults with the purge valve and the rest of the ELC system. The ECM will store the relative fault codes, along with details of the engine speed, battery voltage and air temperature. The driver may notice the following effects in circumstances where the ELC system has failed:
The engine may stall periodically when returning to idle
The engine may suffer from poor idle quality
Thanks guys
Well had a fun trip up North this weekend, and came home on a 'Service Engine Soon' Light which didn't flash but stayed on solid, stopped at one point then came back. Checked the tank cap, it was on tight - so today I had them run the OBD II scanner on her, and I have code P0444 (Evaporative Emission Control System Purge Control Valve Circuit Open) Anyone know what this means?
only info i've found so far is this:
Purge valve
The purge valve is located on the right hand side of the engine (when viewed from the front of the vehicle). It forms part of the evaporative loss control system (ELC) and is situated in the line between the charcoal canister and the manifold. The purge valve controls the amount of air/fuel vapour drawn from the canister into the engine. The other components incorporated into the ELC system are:
The charcoal canister, which is located on the right hand inner chassis rail by the hand-brake drum
The fuel tank pressure sensor (NAS only), located in the fuel sender unit
The intake manifold
The ECM controls the amount of vapour drawn from the charcoal canister by controlling the length of time the purge valve is open. It controls the length of time it is open by supplying the purge valve with a PWM voltage. Control is used to maintain the required level of emissions, as a hydrocarbon vapour level of 1% can affect the air/fuel ratio by as much as 20%.
The ECM can diagnose faults with the purge valve and the rest of the ELC system. The ECM will store the relative fault codes, along with details of the engine speed, battery voltage and air temperature. The driver may notice the following effects in circumstances where the ELC system has failed:
The engine may stall periodically when returning to idle
The engine may suffer from poor idle quality
Thanks guys
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