Fault code after repair
Thread Starter
Newbie
Joined: Jan 2026
Posts: 1
Likes: 0
Mercedes C200 CDI AMG
Fault code after repair
Hi
I have a 2012 C200 CDI on 115k miles, after having the fuel filter housing replaced due to a coolant leak I now have DTC P0428 - Catalyst Temperature Sensor - High Input (Bank 1 Sensor 1), also the air conditioning doesn't work. It was all fine before the repair.
Any idea what this could be? I'm thinking its likely something split or not put back correctly.
I have a 2012 C200 CDI on 115k miles, after having the fuel filter housing replaced due to a coolant leak I now have DTC P0428 - Catalyst Temperature Sensor - High Input (Bank 1 Sensor 1), also the air conditioning doesn't work. It was all fine before the repair.
Any idea what this could be? I'm thinking its likely something split or not put back correctly.
MBWorld Fanatic!
Joined: Aug 2023
Posts: 3,863
Likes: 1,191
From: MA Coast
W204 2010 C300 4matic Sport M272
Fuel filter housing for a coolant leak? Doesnt make sense to me. Do you mean oil filter housing?
What is your specific submodel, or vin? Im not familiar with diesels so im looking at the diagrams to see what you may have touched while doing the work.
Explain a little more what you mean by the air conditioner not working at all. Does the light on the button stay on, or blink, or shut off, not run on at all?
What is your specific submodel, or vin? Im not familiar with diesels so im looking at the diagrams to see what you may have touched while doing the work.
Explain a little more what you mean by the air conditioner not working at all. Does the light on the button stay on, or blink, or shut off, not run on at all?
