So my car failed it’s MOT on the emissions. I serviced it 2 days before and ragged it to the garage. It’s an AMK on 145,000. The results were:
Fast Idle
Engine speed:
Limit 2500-3000 Actual 2820
CO:
Limit <0.3 Actual 5.1
HC:
Limit <200 Actual 188
Lambda:
Limit <0.97-1.03 Actual 0.87
Second Fast Idle
Engine speed:
Limit 2500-3000 Actual 2540
CO:
Limit <0.3 Actual 4.3
HC:
Limit <200 Actual 257
Lambda:
Limit <0.97-1.03 Actual 0.89
Natural Idle
Engine speed 760
CO:
Limit <0.5 Actual 1.5
I cleaned the pre cat lambda 2 days prior as this caused it to fail on the same things last year. Could it be that the lambda sensor needs replacing and if so what’s causing this problem to reoccur? Are there any other problems that could cause such high readings? Any help is greatly appreciated.
Fast Idle
Engine speed:
Limit 2500-3000 Actual 2820
CO:
Limit <0.3 Actual 5.1
HC:
Limit <200 Actual 188
Lambda:
Limit <0.97-1.03 Actual 0.87
Second Fast Idle
Engine speed:
Limit 2500-3000 Actual 2540
CO:
Limit <0.3 Actual 4.3
HC:
Limit <200 Actual 257
Lambda:
Limit <0.97-1.03 Actual 0.89
Natural Idle
Engine speed 760
CO:
Limit <0.5 Actual 1.5
I cleaned the pre cat lambda 2 days prior as this caused it to fail on the same things last year. Could it be that the lambda sensor needs replacing and if so what’s causing this problem to reoccur? Are there any other problems that could cause such high readings? Any help is greatly appreciated.