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Recurring P0159,P0139 SLow resp.O2 circut
Just an update. The dealership could not flash because they didn't have the older version of flash equip. Said that some d-ships still might have it. Upstream sensor still hangs high on highway cruising, and if I don't catch it, it eventually throws a code. Not bias to either bank. Still...- cat-black
- Post #18
- Forum: KJ General Discussion
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Recurring P0159,P0139 SLow resp.O2 circut
This is the list of computer or ecm p/n and update ones- cat-black
- Post #17
- Forum: KJ General Discussion
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Recurring P0159,P0139 SLow resp.O2 circut
Yep. Great info From all that looks like my sensors are doing the right thing.the computer runs self tests as well its part of the monitors, that's what I think is happening when the upstream stays high for a bit. I've found that my ecm p/n is not the latest. Mine is 56044209AH. It updates to AI.- cat-black
- Post #16
- Forum: KJ General Discussion
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Recurring P0159,P0139 SLow resp.O2 circut
One more thing, if anyone knows what their "normal" O2 sensors voltages are... Someone mentioned .5 to .6? On downstream.- cat-black
- Post #12
- Forum: KJ General Discussion
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Recurring P0159,P0139 SLow resp.O2 circut
Ok thanks folks. I'll likely get stealership cats I can get a discount. I'll post some pics soon of the vents and oil catch can I did.- cat-black
- Post #11
- Forum: KJ General Discussion
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Recurring P0159,P0139 SLow resp.O2 circut
Temps on cats are 350 F before and 375 or more after the cat.- cat-black
- Post #8
- Forum: KJ General Discussion
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Recurring P0159,P0139 SLow resp.O2 circut
All valid points, but I see the upstream staying high as well, and that's what sends everything for a ****. I'll check temps with an infrared gun, and what plugs? Just reg old NJK?- cat-black
- Post #7
- Forum: KJ General Discussion
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Recurring P0159,P0139 SLow resp.O2 circut
On the list to check again - plugs, O2 sensor wiring, fuel pressure. anything else? thanks in advance.....- cat-black
- Post #2
- Forum: KJ General Discussion
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Recurring P0159,P0139 SLow resp.O2 circut
2004 3.7 5spd Manual 130,000 miles Read me! Bought this jeep a month ago. Had slow response from rear 02 sensors on each side, so I did the following. Plugs (bosch), oil change, cleaned IAC, rust sprayed the ground straps, checked all fluids. Ran some inj. cleaner through. Checked all vacuum...- cat-black
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- Replies: 17
- Forum: KJ General Discussion
