p0178 code in an LM7 swap
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Teching In
Joined: Mar 2024
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p0178 code in an LM7 swap Hey guys I swapped a 02 LM7 into a 82 C10 all going sweet throws a couple codes up 2 are for the rear o2;s which is fine as they have been removed but the other is the fuel composition sensor circuit low voltage , I feel a little stupid asking & did search but would I even have this sensor ? would it not normally be i the fuel lines? If so does it matter with the pcm adjust anything due to this & I should have it tuned out of the PCM cheers
TECH Enthusiast
Joined: Jul 2019
Posts: 636
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Hey guys I swapped a 02 LM7 into a 82 C10 all going sweet throws a couple codes up 2 are for the rear o2;s which is fine as they have been removed but the other is the fuel composition sensor circuit low voltage , I feel a little stupid asking & did search but would I even have this sensor ? would it not normally be i the fuel lines? If so does it matter with the pcm adjust anything due to this & I should have it tuned out of the PCM cheers
That said the codes shouldn't hurt anything and if its running well and making power, dont worry about it.
