mistergrumpy
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| posted on 8/8/09 at 05:24 PM |
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Fault Code P0136
Had a look at the neighbours car earlier, an 04 Ford Ka. The engine management light was coming on. I stuck it onto my machine and it was showing code
P0136 which I believe is an O2 sensor fault on bank 1 sensor 2 but my question in which sensor is it? There's a sensor on the exhaust manifold
and then one further down just after the bend.
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prawnabie
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| posted on 8/8/09 at 05:55 PM |
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Look at the readings - the post cat sensor should show a very steady reading, fluctuations in this reading mean either the sensor is fubared or the
cat isn't doing its job.
Either that or using the above info you can determine using the description of the sensor which one is 1 and which is 2
HTH
Shaun
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mistergrumpy
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| posted on 8/8/09 at 06:12 PM |
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Sensor 2 on the machine holds a steady reading when the engine is revved whilst sensor 1 goes up with the revs. I guess if I just unplug one of them I
should notice then.
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froggy
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| posted on 8/8/09 at 06:17 PM |
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sensor 2 is the post cat lambda and if the car has the cat combined with the manifold then its likely the cat has had it . the code should read cat
efficiency on a professional scanner. pre cat lambda will switch between 0.2 and 0.8 post cat will be reading 0.5 if the cat is tired
[IMG]http://i144.photobucket.com/albums/r187/froggy_0[IMG]
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mistergrumpy
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| posted on 8/8/09 at 06:35 PM |
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Sensor to was reading around 0.425 steadily if I remember. The car had very recently passed its MOT as well.
Cheers for thats though chasps. I'll give it a clean and check the wiring before anything else.
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britishtrident
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| posted on 8/8/09 at 06:45 PM |
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What that code really means is that based on the output from the rear O2 sensor is outside limits and for some reason cat is not working efficiently
----- nb this in itself it doesn't mean the cat is history just that it isn't catalyzing which is often due to a different engine
fault. First do the simple normal checks --- check the cat hasn't broken up --- simple test if you thump the catalyst with your hand and it
rattles like it has rocks inside it has broken up.
Then check the condition of the plugs and leads and that the inlet and exhausts manifolds are tight and not leaking.
However you should reaally get the live data and freeze frame from the ecu looked at -- for that you need a scanner that reads live data ---
see U381 or U581 or U585 on ebay.
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mistergrumpy
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| posted on 8/8/09 at 06:47 PM |
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Got a live data reader.
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jonesier1
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| posted on 9/8/09 at 08:26 AM |
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its the top sensor,they are known for playing up.check the heater curcuit.If you replace it there is a calibration update from ford which is done with
there ids machine to prevent it happening,but can only be done when the sensor is replaced.
im in my own little world...its ok though they know me there
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mistergrumpy
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| posted on 9/8/09 at 09:57 AM |
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Ooh. Now you've introduced doubt. Two for the bottom sensor and one for the top sensor.
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