2000 ML55 trouble codes
#1
2000 ML55 trouble codes
My ML55 gave me a check engine light last night. I assumed it would be an O2 sensor or something like that. The scanner showed P0135 which would usually be a bad sensor before the cat but it also gave me P0422 and P0432.
These are 'Main Catalyst Efficiency Below Threshold' for both banks. Any ideas what would cause this?
Thanks.
These are 'Main Catalyst Efficiency Below Threshold' for both banks. Any ideas what would cause this?
Thanks.