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Recurring Code P0136

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  #1  
Old 12-05-2006, 06:20 AM
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Recurring Code P0136

Hi all,

My SES light comes on for about 3-4 drive cycles with the code P0136, which is for an O2 sensor. After a few drive cycles with the SES off, it will come back on. The car seems to run fine, but I am worried that after some random # of cycles like this it'll trigger limp-home-mode and I'll be up the creek (I'm 2 hours from the closest MINI dealer).

Anyone experience this? Advice?

Thanks,

Dave
 
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Old 12-06-2006, 07:28 AM
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O2 Sensor faulty just have it replace, good luck!
 
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Old 12-06-2006, 07:35 AM
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It may also be your aftermarket cat on the exhaust system. These do not last forever. If this is the case, install an O2 simulator and buy a Peake scanning tool to clear your codes (especially right before you go in for emissions testing, if you have that in PA).
 
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Old 12-06-2006, 01:34 PM
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Am I correct in assuming this is the O2 sensor at the cat? If so, easy to replace? Expensive? Will I go into "limp home" mode if I don't act on this soon?
 
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Old 12-06-2006, 01:59 PM
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More likely the post cat O2 sensor. Not difficult to replace with a good wrench or with a special wrench or socket that has a cutout for the wires.

Cost of sesnor, approx. $190 at dealer; cost of O2 simulator, $30 on-line.

No limp mode.
 
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Old 12-06-2006, 02:06 PM
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No limp mode I had mine come and go for 12k miles before I could get it to be on and at the dealer at the same time. You may also pull a system to rich code I never complained about a little extra gas, but I could enduce a smoke puff once and a while with the extra gas getting pumped through. You won't get limp mode, mine was the pre-CAT O2 (bank1 sensor1) had it replaced under warranty (but I doubt you have any left) its easy to get to, but takes some tricky manuvering if you want to DIY on jack stands, my hands and tools were too big to yank it and clean/inspect it. I've heard* that you can get them for $70-75 at your local autoparts store.

*unconfirmed reports on NAM
 
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Old 12-07-2006, 07:06 AM
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Thanks for the input (and you're right Drew, this happened 1000k miles out of warranty!). PNC, can you tell me more about this mysterious 02 simulator? What does it do?
 
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Old 12-09-2006, 02:49 AM
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Originally Posted by ProfessorDave
Thanks for the input (and you're right Drew, this happened 1000k miles out of warranty!). PNC, can you tell me more about this mysterious 02 simulator? What does it do?
An O2 simulator is basically a way of getting the computer to think the O2 sensors are working normally, and thus making it look like thae cat is working. Which is important for those who are running CATless and need to pass emissions and also helps besuase of the fuel map the ECU gets thinking its running in open loop. For a stock MINI I'd search out an O2 sensor at Autozone/Advance/NAPA/O'Riley's/etc.

Here is a basic description of the system
Is your Check Engine light on because your secondary O2 sensor is bad? Or is your catalytic converter failing, gutted or removed? These are expensive parts to replace: A new cat may cost $300-$600. Secondary O2 sensors are over $50.
The O2 Sensor Simulator/MIL Eliminator is your affordable solution!!

If your catalytic converter or secondary O2 sensor(s) is not working properly, the Engine Control Unit (ECU) will receive a bad signal from the sensor(s) and the Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) will come on. This will not cause any damage to your car but it does present other problems:
· Least of all: The CEL/MIL is annoying
· You may not recognize a different problem thinking the CEL/MIL is on because of the O2 sensor
· You will not pass emissions until the ECU is receiving the proper signal from the secondary O2 sensor or this simulator

All cars and light trucks made since January 1, 1996 have two O2 sensors (four in dual exhaust applications) to measure the amount of oxygen contained in the exhaust gasses. The first (primary) sensor is upstream from the converter and is used by the onboard computer to calculate the air/fuel mixture. The second (secondary) sensor is downstream from the converter and its only job is to report if the converter is working properly. The CEL/MIL will come on if:
a: The converter has been removed/gutted or needs to be replaced
b: The sensor has been removed or is malfunctioning.
This simulator will solve both of those problems!
You have problem B but it is likely to fall under this condition
This O2 Simulator/MIL Eliminator cannot be used to replace the primary/upstream sensors since those are used to create the proper air/fuel mixture.
So a simulator isn't an option unless you know it is the 2nd sensor (when mine when it was the pre-CAT or first sensor)

The product you get is basically a computer chip that replaces the 2nd sensor from what I understand following O2sensorsimulator.com
 
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Old 12-09-2006, 05:27 AM
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P0136 is 2nd sensor circuit
P0130 is 1st sensor circuit
 
  #10  
Old 12-09-2006, 05:47 AM
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Originally Posted by Motor On
No limp mode I had mine come and go for 12k miles before I could get it to be on and at the dealer at the same time.
I had essentially the same experience. It came on and went off repeatedley for probably 10,000 miles until my 25,000 mile service visit. I experienced no problems other than the SES light and they said it was the o2 sensor which they replaced.

It is now two weeks since replacement and it is on again. This time I will not wait another 15,000 miles to take it back.
 
  #11  
Old 12-11-2006, 04:41 AM
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Great information everyone. And thanks for the info about the O2 simulator, Drew. Since it appears that my problem is with the 2nd sensor, I'll look into it.
 
  #12  
Old 01-17-2013, 01:19 PM
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i know I'm digging up an old thread my car is now catless and in need of some mil eliminators, do any of you guys know where I can pick one up? TIA
 
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