code 1661
Thread Starter
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Senior User
Joined: Jan 2008
Posts: 226
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From: Emmett, ID
code 1661
finally got my truck scanned. HPOP passed, contribution test passed. the only problem found was a 1661 code, and according to the tech my pcm is searching and not finding the right data. according to him i need a new PCM.
what do you guys think?
what do you guys think?
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
1661 PCED OCC signal low Aborts KOEO OCC test Low system voltage, internal PCM fault
Either yes your PCM is bad (doubt it!), you have a battery or alternator that isn't doing its job or he ran the test when the GP's were active and you have weak batteries. I would have the batteries and alternator tested. you could also have wiring or ground issues. Full on testing should be done before replacing the PCM. I am pretty sure this code is referring to the 5 volt reference sent out to the sensors but I can't say for sure.
Either yes your PCM is bad (doubt it!), you have a battery or alternator that isn't doing its job or he ran the test when the GP's were active and you have weak batteries. I would have the batteries and alternator tested. you could also have wiring or ground issues. Full on testing should be done before replacing the PCM. I am pretty sure this code is referring to the 5 volt reference sent out to the sensors but I can't say for sure.
Thread Starter
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Senior User
Joined: Jan 2008
Posts: 226
Likes: 0
From: Emmett, ID
batteries in november but i have wondered about a ground the radio gets interference and sometimes a get static shock when getting out. i guess ill change the ground to the block and the block to the frame. any other thoughts??
