Trying to troubleshoot code P0141 (O2 sensor heater circut)

rallycom · **Joined:** Sun Nov 21, 2010 10:23 am **Posts:** 18

[b][/b] I'm trying to troubleshoot code P0141 (O2 sensor heater circuit) & I'm running short of nerves & hair :banghead:

.....so please help!

The sensor in question is bank 1 sensor 2, which I have replaced with the correct Mopar replacement (56029049AA SENSOR, Oxygen, After catalyst left).....still "no joy" :banghead:

!

I know that these downstream sensors do not affect the running of the engine, but I live in an area that does emissions testing for required yearly state inspection, so I’d like to repair it asap :5SHOTS:

.

I have the service manual, VOM, & a OBD II CAN code scanner.

Please Help Help Help !!!!!!!

More info: The Jeep has 109,000 mi. & runs fine, the problem started about 3 months ago when I got a code for a bad bank 2 sensor 1. I purchased a Bosh sensor from Autozone but didn't get around to changing it until about 2 weeks ago. As soon as I installed the Bosh sensor the code P0152 reappeared as well as the new P0141.

I spoke with a tech at Bosh who explained that they had reengineered the bank 1 & 2 sensor 1 and it is not reliable for use in the KJs, Bosh recommended Mopar. Purchased and installed Mopar (56028994AB SENSOR, Oxygen, Before catalyst, Right), the P0152 code went away but I am still plagued with the P0141.

My OBD II reader shows that the sensor is being recognized and the voltage is within the proper range……. :furious:

so that leaves the heater circuit.

Again Please HELP! :5SHOTS:

BugginKJ · **Joined:** Mon Jul 06, 2009 7:35 pm **Posts:** 4576

I had the same issue. I replaced the downstream sensor, code still came up along with flashing gas cap warning. Replaced the first o2 sensor and code went away, that was last month some time and no code(s) have come back up since. I also used the Bosch sensors just as someone else I know and am not having any issues.

rallycom · **Joined:** Sun Nov 21, 2010 10:23 am **Posts:** 18

Thanks for the response.......I'll give that a try. I have another Mopar.

Glad the Bosh is working for you, the tech told me they were reenginered about a year ago the older ones looked like the rear ones (skinny body), the new ones have a fatter body.

Thanks again :5SHOTS:

Trying to troubleshoot code P0141 (O2 sensor heater circut)

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