O2 sensors bad?

[kball05]

My CEL has been bugging the hell out of me I've been fixing everything for my upcoming road trip. I can seem to figure out why all four of my o2 sensors would be giving me a code. Any ideas?


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[Chris]

You're getting codes for all of your O2 sensors at once?

When's the last time they were replaced?

 

[Jerry Bransford]

All four O2 sensors are unlikely to have all failed simultaneously, I'd look at the wiring harness the O2 sensor wiring comes from and look for damage to the O2 wiring harness.

Are the codes O2 heater codes or what?

 

[kball05]

All four O2 sensors are unlikely to have all failed simultaneously, I'd look at the wiring harness the O2 sensor wiring comes from and look for damage to the O2 wiring harness.

Are the codes O2 heater codes or what?

P0031 p0037 p0051 p0057


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[kball05]

You're getting codes for all of your O2 sensors at once?

When's the last time they were replaced?

I haven't replace them at all they look newish lol


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[Jerry Bransford]

There's a TSB that may be the fix for your problem. Do a Google search for TSB #25-001-07. It to do with rewiring the ASD and fuel pump relay inside the Power Distribution Center. TSBs are not Recalls so they're not free to have performed. No guarantees but some had have those same DTCs cured by performing that TSB.

 

[kball05]

There's a TSB that may be the fix for your problem. Do a Google search for TSB #25-001-07. It to do with rewiring the ASD and fuel pump relay inside the Power Distribution Center. TSBs are not Recalls so they're not free to have performed. No guarantees but some had have those same DTCs cured by performing that TSB.

How much you think it would cost?


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[Jerry Bransford]

How much you think it would cost?

No clue sorry.

Here's something more on it I just found...

There is an EPA identified Readiness Testabilty Issue with the 2005-2006 Jeep Wranger concerning the Oxygen Sensor Heater Monitor. The repair is described in TSB #25-001-07. It involves rewiring the fuel pump relay and Auto Shut Down systems. The TSB does not explain how or why the repair corrects the oxygen sensor heater monitor function, and only advises to perform the repair and complete several drive cycles in order to make the Jeep's readiness monitors COMPLETE.

We have to recommend the same. Assuming the Jeep dealership performed the TSB repair properly (we have no reason to suspect otherwise) we recommend performing the drive cycle as many times as possible until the monitors are complete... however... a very important factor... your Jeep's A/C system needs to be turned off during the DRIVE portion of the drive cycle. During the initial idle portion (for 2 1/2 minutes) the A/C and rear defroster should be ON. Before beginning to drive, you must turn the A/C and rear defroster off. The drive cycle will not continue with the A/C on.

So... in conclusion, the dealership may have very well perform the repairs required to get the Oxygen Sensor Heater monitor to run, however the A/C switch will have to be repair as well in order for you to be able to turn off the A/C system and have the drive cycle to complete.

posted by SmogTips Support 09-07-2015