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2007 Chevrolet Malibu Trouble Codes P0036, P0141

Tiny
KRISTINAWHITE09
  • MEMBER
  • 2007 CHEVROLET MALIBU
  • 3.5L
  • FWD
  • AUTOMATIC
  • 161,000 MILES
Hi!

I'm getting the above trouble codes on my car. I replaced the Bank 1, Sensor 2 O2 sensor with an AC Delco. They also checked all my fuses and I'm not having any issues with my car other than poor gas mileage. Does this mean there is (for sure) an electrical issue? One of the reasons I've read this comes up is if there is a poor connection at the O2 sensor itself. Do you know how long this would normally take to diagnose? I'm taking it to the shop this weekend or next and just want to make sure their 2 hour diagnosis fee is accurate.
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Wednesday, July 23rd, 2014 AT 4:52 AM

6 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
The circuit has a short to ground someplace causing these codes. It has to be traced to where the problem is and it acan be anywhere.
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Wednesday, July 23rd, 2014 AT 12:43 PM
Tiny
KRISTINAWHITE09
  • MEMBER
  • 44 POSTS
Thank you. I also now have P1818 and P0054, so I'm pretty positive it'll take a while.
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Thursday, July 24th, 2014 AT 4:58 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Get your battery checked for condition including load test. If it's bad or weak it will give false codes.I know from previous questions you replaced tcm and 1818 is a trans valve problem so this may have been your problem all along and it's best to have a trans guy look at this as it maybe a stuck valve body or pressure switch or even an internal problem like a clutch.
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Thursday, July 24th, 2014 AT 5:38 AM
Tiny
KRISTINAWHITE09
  • MEMBER
  • 44 POSTS
Thank you! I actually found out I had a bad wire from my TCM to the fuse box. He found a short in that wire. That fixed all my problems other than a couple O2 sensor codes. Replaced the O2 sensor with AC Delco and still have codes saying I have an open circuit near the O2 sensor. I think I have a lot of electrical issues based on the codes I'm getting. I'm taking it in to see if I have more wiring issues. If they find another short, I'll have them fix that. If that doesn't fix all the codes, I'll take it to a trans shop. I know of one that'll look at it for free but they want to keep it all day.
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Thursday, July 24th, 2014 AT 6:04 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
The 1818 code is the only one that is for transmission if it's gone don't worry about it.
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Thursday, July 24th, 2014 AT 6:14 AM
Tiny
KRISTINAWHITE09
  • MEMBER
  • 44 POSTS
I had it once before, then had the wiring to the TCM fixed and that seemed to fix the code and issues I had from it. It's back now, so I think/hope it may be related to my existing wiring issue around the O2 sensor. When that code came up, I started having similar issues as before (door locks not automatically locking/unlocking when they're supposed to; dash doesn't display whether I'm in park, neutral, etc.). Seems like when they mess with the wires it'll work for a while, then it doesn't. I hope it's just another shorted wire but we'll see I guess. Thanks!
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Thursday, July 24th, 2014 AT 6:24 AM

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