P1670
Laughing Gas
Joined: Jul 2003
Posts: 1,157
Likes: 1
From: Littleton, Colorado
That's an Injector Driver Module code. It means the IDM is not communicating W/ the PCM. I'm assuming your trauck isn't running, or running real bad.
We would like to help, but we need more info.
Austin
We would like to help, but we need more info.
Austin
Thread Starter
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Elder User
Joined: Nov 2004
Posts: 682
Likes: 0
From: South Eastern MN
I've been having some problems starting the truck in sub zero weather and if I park it when the truck is hot and it goes to high idle, after a while it starts to run poorly. I believe, in that case that it may have just been because the system voltage was too low.
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
The IDM provides the EF output signal to the PCM to confirm that proper timing/duration of fuel delivery command signal (FDCS) was received. Additionally, the EF signal is used to send diagnostics of the IDM and injectors (electrical) to the PCM.
Possible causes:
Open fuse
DM relay
Open or shorted IDM enable circuit
Open/short in EF circuit
Open/short in FDCS circuit
IDM powering circuits
PCM
PM me your email address and I'll send you the pinpoints.
Possible causes:
Open fuse
DM relay
Open or shorted IDM enable circuit
Open/short in EF circuit
Open/short in FDCS circuit
IDM powering circuits
PCM
PM me your email address and I'll send you the pinpoints.
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