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Faulty Lambda Probe?



  172
Among other small issues with my ph2 172 I have an engine management light on the dash, the orange one on the right hand corner of the dash binicle. I bought a sealey code reader and plugged it in. It came up with 2 faults, fault one was a throttle fault of some description, I can't remember the exact code. Fault 2 was a lambda fault, bank one sensor one.

My initial thought was a faulty throttle body. I removed it and cleaned it up and put it back together, it made no difference. I borrowed my mates throttle pedal and re tested it and it only came up with the lambda fault. I plugged the original pedal back in and it still came up with just a lambda fault. I have kept the new second hand pedal on the car ro see how I go.


The car still suffers from poor performance at rainouts points throughout a journey, irrespective of the speed, rpm or gear that I am in, it can go flat at any time. If I pump the throttle, change gear, keep the throttle flat to the floor etc it comes backup normal. The flat spot only lasts about 5 seconds tops.


Could a faulty lambda sensor do this? I have also noticed that it smells like the exhaust gases are very rich, could this e connected to the same lambda?


I am surprised I have this fault because according to the receipts I have with the car, both lamas were replaced with Bosch sensors less than a year ago?


Can anyone shed some light please?
 


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