Went for a MOT today, my Leon 1.4 Petrol 123k miles failed on carbon monoxide and hydrocarbon content emissions on fast idle tests. Anyone have any idea if this could be a clogged EGR since I've been getting a P0401 (Exhaust EGR Flow Insufficient.) code few times, or is it something worse like the cat?
Test results below:
Fast Idle Test_________Max
RPM = Manual Check___Pass
CO = ____ 0.55_________0.30
HC =_____115__________200
Lambda = 1.009_______1.030
Second Fast Idle Test_Max
RPM = Manual Check__Pass
CO =_____0.41_________0.30
HC =_____294__________200
Lambda = 1.009_______1.030
Natural Idle Test-----------Max
RPM = Manual Check Pass
CO = 0.43 0.50
Test results below:
Fast Idle Test_________Max
RPM = Manual Check___Pass
CO = ____ 0.55_________0.30
HC =_____115__________200
Lambda = 1.009_______1.030
Second Fast Idle Test_Max
RPM = Manual Check__Pass
CO =_____0.41_________0.30
HC =_____294__________200
Lambda = 1.009_______1.030
Natural Idle Test-----------Max
RPM = Manual Check Pass
CO = 0.43 0.50
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