My car has just failed its first MOT on the lambda readings, what is this can someone help.
Readings on the printout are as follows
Fast idle test 1:
Engine Speed: 2500 -3000rpm Pass
CO: <= 0.200% Manual check -0.002% pass
HC: <= 200ppm Manual Check 2ppm pass
Lambda 0.970-1.030 Manual Check 1.380 fail
Fast idle test 2:
Engine Speed: 2500 -3000rpm Pass
CO: <= 0.200% Manual check -0.001% pass
HC: <= 200ppm Manual Check 0ppm pass
Lambda 0.970-1.030 Manual Check 1.265 fail
What do you think the problem is anyone and will it be expensive?
Please help and thanks for any you may give.
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