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Lambda Sensor problem

7K views 5 replies 4 participants last post by  Nick H  
#1 ·
Hi, a few months ago my whole exhaust system fell off due to corrosion and was replaced. Shortly after, my engine light started coming on. Diagnostics revealed it was one of the lambda sensors so I had it
replaced. After a week it came on again, this time it was the other sensor. Now, after having a total of 5 sensors replaced in the last few months it's come on again. I've had them all replaced at the same garage so last week I took it for a service at another garage, they don't have any idea what the issue could be either. This is becoming such a pain and very costly and I also want to sell the car ASAP to upgrade and I can't with issues like this.
The codes I have so far from the numerous receipts are PO130, PO131, PO134, PO138, PO140 and PO141.

Any help or advice is greatly appreciated as this is driving me crazy!
 
#6 ·
As per @Harrydog1 - check the connectors at each of the sensors for any signs of oil contamination. Also - I wonder if the new exhaust is blowing anywhere.?? If it's far enough forward it will affect the readings to the o2 sensors as it'll be drawing air in where it shouldn't.
 
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