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Old 10-06-2017   #1
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Unhappy HELP. Lambda sensor fuse number and location.

Hi.
After an return of the hesitation I have checked the live data and it's looking like there is no supply to both banks for the heaters of the lambda sensors.
I can find no reference to a fuse for them in the handbook, I cant believe Fiat have no fuse for these in the Panda so I can only assume its not mentioned in the handbook.
Can someone tell me the fuse number and location please. The car is a 2014 Panda 1.2 both lambda sensor cables run under the ECU and no doubt into the under bonnet fuse box.
Help please as this getting frustrating now
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Old 10-06-2017   #2
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Re: HELP. Lambda sensor fuse number and location.

A wee bump on this..... anyone?
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Old 10-06-2017   #3
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Re: HELP. Lambda sensor fuse number and location.

Look for condition of heaters from a cold start, that's when they should definitely be on.
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Old 10-06-2017   #4
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Re: HELP. Lambda sensor fuse number and location.

Check wiring diagram for fuses.
I don't think they are fused from ECU to heaters.
Put me right if I'm wrong.
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Old 10-06-2017   #5
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Re: HELP. Lambda sensor fuse number and location.

Quote Originally Posted by jackwhoo View Post
Check wiring diagram for fuses.
I don't think they are fused from ECU to heaters.
Put me right if I'm wrong.
Thanks Jack.
Not to be fused is a serious issue, the heaters can short out and without fuse protection could be termed a fire risk. I wasn't able to do further checks today but I'll check for 12v at the heater when I can.
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Old 10-06-2017   #6
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Re: HELP. Lambda sensor fuse number and location.

Quote Originally Posted by murphyv310 View Post
Thanks Jack.
Not to be fused is a serious issue, the heaters can short out and without fuse protection could be termed a fire risk. I wasn't able to do further checks today but I'll check for 12v at the heater when I can.
Possibly the ECU is programmed to protect the heater circuits?
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Old 10-06-2017   #7
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Re: HELP. Lambda sensor fuse number and location.

The mil should light and a code set if either lambda heater non functional.
There is a separate code for each heater.
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Old 10-06-2017   #8
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Re: HELP. Lambda sensor fuse number and location.

Quote Originally Posted by jackwhoo View Post
The mil should light and a code set if either lambda heater non functional.
There is a separate code for each heater.
I agree, Alfa Obd and Torq actually report the same issue, oddly the MIL light is off.
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Old 11-06-2017   #9
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Re: HELP. Lambda sensor fuse number and location.

Quote Originally Posted by murphyv310 View Post
I agree, Alfa Obd and Torq actually report the same issue, oddly the MIL light is off.
What are the pxxxx codes you have?
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Old 11-06-2017   #10
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Re: HELP. Lambda sensor fuse number and location.

Quote Originally Posted by jackwhoo View Post
What are the pxxxx codes you have?
Hi Jack.
I'll need to check it again later as my memory is rubbish and I also forgot to write it down..... 63 and a heart bypass then you forget the simple things.. . Oh dear.
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Old 12-06-2017   #11
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Re: HELP. Lambda sensor fuse number and location.

Here is a screen shot off torque.
Didn't work through the app.
Here's a photo. I whipped out the sensor and cleaned it with carb cleaner and the codes have now gone but I get this message now.
Still no MIL light !!!
Attached Thumbnails
Click image for larger version

Name:	IMG_20170612_161608.jpg
Views:	14
Size:	2.34 MB
ID:	181398  
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Last edited by murphyv310; 12-06-2017 at 16:33.
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Re: HELP. Lambda sensor fuse number and location.

I don't use torque.
It doesn't look very useful .
Which sensor did you attempt to clean with carb cleaner?
Did it look sooty or white?
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Re: HELP. Lambda sensor fuse number and location.

What were the pxxxx codes before they disappeared?
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Old 12-06-2017   #14
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Re: HELP. Lambda sensor fuse number and location.

The first sensor pre cat. It was pretty sooty. Funny I replaced the air filter at the same time as the plugs, it was really filthy. As far as I can tell although the book was stamped the 18000 mile service was never done.
Alfa Obd now reports on the live data when the engine is nearly at full operating temperature that both sensors are now closed loop which is correct, previously sensor 1 stayed open loop. Will give the car a run tomorrow and see how it feels.
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Old 12-06-2017   #15
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Re: HELP. Lambda sensor fuse number and location.

Good luck tomorrow.
Iffy wiring to the regulating lambda sensor that you removed and replaced perhaps.
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