Problem after swapping in a used engine on '04 Silverado
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Joined: Mar 2016
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Problem after swapping in a used engine on '04 Silverado
Hi,
My 2004 Silverado 1500 Z71 Crew Cab has ~240K miles. I just put in a used 5.3L with 70K miles from a 2003 GMC Sierra.
Everything seems to be running OK, but after putting 5-10 miles on it the check engine comes on with the following codes:
P0131 (twice)
P0171
P1131
I have cleared the codes once with the same result.
Any ideas as to what it could be? It seems to be pointing to O2 sensors that were not part of the engine swap. The connectors were checked to see if they were connected.
Thanks,
Jim
My 2004 Silverado 1500 Z71 Crew Cab has ~240K miles. I just put in a used 5.3L with 70K miles from a 2003 GMC Sierra.
Everything seems to be running OK, but after putting 5-10 miles on it the check engine comes on with the following codes:
P0131 (twice)
P0171
P1131
I have cleared the codes once with the same result.
Any ideas as to what it could be? It seems to be pointing to O2 sensors that were not part of the engine swap. The connectors were checked to see if they were connected.
Thanks,
Jim