OBD2 Questions
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From: Spring Lake
OBD2 Questions
So I've been having lots of issues with the truck lately, and it hasn't thrown a code. So naturally, I verified the check engine lightbulb is not burned out. On the OBD2 port there is voltage,
But get this, because I dont trust that stupid light... I started unplugging and playing. Here's what I have found:
Disconnected cam sensor: runs and drives exactly the same, no check engine light
Disconnected MAF: barely runs, still no code
Disconnected various coils: barely runs, still no code
Is there anything I can do to make it throw a code? How do I go about troubleshooting something like this? All the repair material I've read is dependant upon codes, and well, without them I can't do too much
But get this, because I dont trust that stupid light... I started unplugging and playing. Here's what I have found:
Disconnected cam sensor: runs and drives exactly the same, no check engine light
Disconnected MAF: barely runs, still no code
Disconnected various coils: barely runs, still no code
Is there anything I can do to make it throw a code? How do I go about troubleshooting something like this? All the repair material I've read is dependant upon codes, and well, without them I can't do too much
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Posting Guru
Joined: Jul 2007
Posts: 1,433
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From: Spring Lake
So after doing some research, it turns out on GM vehicles the CEL can be deactivated and certain categories of codes/ all codes can be ignored if that is how the tuner set them up.
Does anyone know if this can be done on a Ford, or if anyone has had experience doing it?
I checked the pinout of my OBD2 (with the Fluke) port and everything is live and working, but for some reason the PCM isn't acknowledging anything that should throw a code~ I'm wondering if perhaps the dealer that sold me the truck deactivated the CEL... it turns out everything else they told me about the truck was a lie.
On the plus side, in the search for my PCM I found receipts behind the glovebox, turns out the truck spent at least a year or two in Miami Gardens.
Does anyone know if this can be done on a Ford, or if anyone has had experience doing it?
I checked the pinout of my OBD2 (with the Fluke) port and everything is live and working, but for some reason the PCM isn't acknowledging anything that should throw a code~ I'm wondering if perhaps the dealer that sold me the truck deactivated the CEL... it turns out everything else they told me about the truck was a lie.
On the plus side, in the search for my PCM I found receipts behind the glovebox, turns out the truck spent at least a year or two in Miami Gardens.
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