po codes po132 & po138

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May 25, 2011 | 07:13 AM

2000 laredo

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Newbie

Joined: May 2011

Posts: 1

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Model: Cherokee

po codes po132 & po138

I replace sensors 3 time already with oem parts, works fine for about two weeks then ck engine come back on, what could be my problem for the sensors to keep going bad .
thanks for any replys

Last edited by 2000 laredo; May 25, 2011 at 07:23 AM.

May 25, 2011 | 08:46 AM

Bustedback

CF Veteran

Joined: Feb 2010

Posts: 12,367

Likes: 23

From: Oroville, CA

Year: 1995

Model: Grand Cherokee

Engine: 4.0 with all of the noise and clatter

You need a scan tool to properly diagnose the problem by following a troubleshooting tree. As you can see, throwing new and expensive sensors at it is not fixing the problem. P0132= Check the wiring (green/red wire) between the o2 sensor and PCM for a short to voltage. P0138= Check wiring (black/dark green) between o2 sensor and PCM for shorts to voltage.

Last edited by Bustedback; May 25, 2011 at 09:27 AM.