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 P1645 definition

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Name : Codith
Age : 30
Location : Villa Park, IL
Joined : 2007-02-08
Post Count : 3603
Merit : 127

PostSubject: P1645 definition   Sat Jan 22, 2011 3:41 pm

I pulled my codes using a DHP and it brought up 1645.
Here's what I'm finding for the definition of the code from these sources.

DHP : Auxiliary Coolant Heater Control Module Performance
HPT: Evaporative Emission (EVAP) Vent Solenoid Control Circuit
'97 FSM: Boost Control Solenoid Control Circuit

Funny thing is all these are items I have been kind of dealing with in some way lately but anyway who's right? I recently restored my EVAP system and got a replacement boost control solenoid so the code is gone anyway but I think it's funny how there is such a discrepancy to the code's definition. I suppose the FSM would be the most reliable source assuming no mistakes were made. I've found mistakes in my FSM before.
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Name : Scott
Location : Macomb, Michigan
Joined : 2010-02-24
Post Count : 4233
Merit : 177

PostSubject: Re: P1645 definition   Sat Jan 22, 2011 11:27 pm

P1645 = Boost Control Solenoid Circuit.

The FSM is correct .

The BCS, however, also shares it's power feed with the EVAP Purge Valve, the Purge Vacuum Switch, the EGR, O2 sensor #1, it's powered by the OXY SENS fuse, and the entire circuit is monitored by the PCM. No idea where DHP or HPT get their descriptions from....
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