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Re: i have a check engine light on my 2003 chevy truck it...
P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter
the engine to be burned, rather than vented into the atmosphere as an emission.
The purge valve solenoid is supplied switched battery voltage. The ECM controls
the valve by operating the ground circuit, opening the purge valve at specific
times allowing these gasses to enter the engine. The ECM monitors the ground
circuit as well, watching for faults. When the purge solenoid isn't activated,
the ECM should see a high voltage on the ground circuit. When the solenoid is
activated, the ECM should see the ground voltage pulled low, close to zero.
If the ECM doesn't see these expected voltages, or senses an open in the circuit,
this code is set. Hope this helps
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the infomation u were given is 100% wrong! if the light is coming on then a problem exists in the OBD 2 engine control system, there will be a fault code stored for the check engine light, who told u this the dealer??
The EGR valve is located right behind the multi port. ( the black plastic on top of the engine. it is kinda difficult to remove it if you have no experience with) I don't think is serviceable but some folks I know had told me that once removed, you can clean it with carburetor cleaner. the valve runs about 215 Dlls. at your local autoparts store.
Wow, I just went through the same problem and guess what it was a clogged converter and a bad oxyegen sensor. The garaged fixed it up for me by putting an eco converter on it and a new O2 sensor. I have a 2003 Chevy Impala,V6 3.8 engine. Good Luck!!!!
did you replace the MAF mass airflow sensor ? If you did not, clean it with electronics cleaner so it won't damage the sensor. that could be the cause. also the EGR vavle would cause a problem like that.