PCM Shot?
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5th Wheeling
Joined: Nov 2021
Posts: 32
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PCM Shot?
PCM Fault 1 shows up when I hook my scanner up to my truck. It wont set the I/M readiness. Live data shows the o2 heaters going on and off. But the live data also shows o2 sensors ok. WTF
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
Better go look at the emissions sticker under the hood to see if you have a California or a "Federal" emissions system.
You're likely wasting your time trying to get non-existent sensors to come to ready. Lot's of threads on this issue (in the appropriate sub-forums...).
You're likely wasting your time trying to get non-existent sensors to come to ready. Lot's of threads on this issue (in the appropriate sub-forums...).
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5th Wheeling
Joined: Nov 2021
Posts: 32
Likes: 2
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Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
Which specific I/M monitor is "Not ready"?
Sparce information leads to "20 questions" which causes a lot of knowledgeable guys to simply ignore you. You're already on that border due to the vagueness you've presented....
Sparce information leads to "20 questions" which causes a lot of knowledgeable guys to simply ignore you. You're already on that border due to the vagueness you've presented....
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5th Wheeling
Joined: Nov 2021
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OK I dont believe it but I missed something big. Somewhat embarrassing but the downstream sensor is gone! The exhaust was replaced from the cat back and it looks like they cut just before the o2 bung so they can ad exhaust pipe from there. Right now I am going bat**** crazy trying to find the plug that lead to the downstream sensor. I can always weld a bung in and get the downstream sensor setup like stock. looked all over the internet but cant find any info on the location of the connector. Can someone please give me a clue as to where the connector should be?
Thank You
Chris
Thank You
Chris
Cross-Country
Joined: Jan 2015
Posts: 89
Likes: 5
From: Central New Jersey
Project sho89 is right. If it's federal emissions it doesn't have the downstream sensor. Pcm fault 1 means nothing. You must have a code in there somewhere. Maybe try a different scanner or go to one of the chain stores and have them scan it for you. The monitors don't get ready because the PCM is seeing something it doesn't like. Watching data and saying they are working means nothing. O2 sensors can set lots of different codes and appear to be working. Find the code and it will be easy from there.
Cross-Country
Joined: Jan 2015
Posts: 89
Likes: 5
From: Central New Jersey
Project sho89 is right. If it's federal emissions it doesn't have the downstream sensor. Pcm fault 1 means nothing. You must have a code in there somewhere. Maybe try a different scanner or go to one of the chain stores and have them scan it for you. The monitors don't get ready because the PCM is seeing something it doesn't like. Watching data and saying they are working means nothing. O2 sensors can set lots of different codes and appear to be working. Find the code and it will be easy from there.
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