P0101 and P0300 codes Runs really bad
#1
CF Beginner
Thread Starter
P0101 and P0300 codes Runs really bad
Hi this is my first post on this forum. I have a problem with my 2004 Suburban I hope someone can help with. It runs really bad, no power, clatters and backfires will hardly go over 45. CEL is on and sometime flashing. Autozone read codes P0101 - Mass Air Flow (MAF) Circuit Range/Performance Problem
P0300 - Random misfire
Changed MAF with my Corvette. Corvette still runs fine (no codes). Suburban still runs bad. Checked cats temp front (300 degrees) , back (500 degrees). Checked fuel pressure at 45psi . Where do I go from here? What do y'all think is going on? Thanks for any help and advice.
P0300 - Random misfire
Changed MAF with my Corvette. Corvette still runs fine (no codes). Suburban still runs bad. Checked cats temp front (300 degrees) , back (500 degrees). Checked fuel pressure at 45psi . Where do I go from here? What do y'all think is going on? Thanks for any help and advice.
#2
CF Beginner
Thread Starter
If anyone is interested. This turned out to be catalytic converters. Confirmed by removing before cat O2 sensors and taking for a ride. With sensors out it ran good and very loud. Replaced cats. Runs like new again.
The following users liked this post:
James The Plumber (June 12th, 2020)
#3
Administrator
Thanks for follow up on your post and what the fix was! its what makes forums work
FWIW, my 07 Tahoe, when I check the catalytic converters temps they are more around 1100°-1200° under normal driving conditions...
FWIW, my 07 Tahoe, when I check the catalytic converters temps they are more around 1100°-1200° under normal driving conditions...
#4
Cat
The following 2 users liked this post by brian90vette:
73shark (October 13th, 2019),
James The Plumber (June 12th, 2020)
#6
Same problem
My 2003 Silverado 4.3 was loud and was told to change manifold gasket which I did and now I have codes 0101 and 0300 . Truck is quite now and when idle sounds okay but as soon as try to take off it’s barely moving and will have small backfire sounds . I was going to change 02 sensor but now I’m thinking it’s probably the cat . Is there anyway to tell without removing and driving without 02 sensor ??
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