Upstream 02 Sensor ciruit
Thread Starter
Junior Member
Joined: Oct 2009
Posts: 17
Likes: 2
From: Toronto, Ontario
2005 C230K Coupe
Upstream 02 Sensor ciruit
Help,
ISO, wiring diagrams for an 05 C230 Kompessor 1.8
Particularly the pinout diagrams for the two 02 sensor(s) body harness from the ECM-to-02 connectors etc.
Geting minimal voltage reading from the upstream 02 sensor(s) Downstream is fine flucuating between .40-.90
CEL on and Fuel trim code.
Id be so gratefull if anyone could help out, ive replaced in less than a yesr plugs fuel-pump/filter/plugs/MAF/Camshaft magnetic senors etc..oh and last week even went as far as suspecting the ECM and purchased a used one, got it virginized and cloned and still same thing.
TIA.
Engine runs fine/smooth etc. except for exccessive fuel consumption, used to get close to 700 klm/tank...now at 400/tank.
P0136, P0170, P0171 been trying to figure this out forever lol
The only parts replaced in regards to the CEL on were the MAF, upstream 02, and the ECM
ISO, wiring diagrams for an 05 C230 Kompessor 1.8
Particularly the pinout diagrams for the two 02 sensor(s) body harness from the ECM-to-02 connectors etc.
Geting minimal voltage reading from the upstream 02 sensor(s) Downstream is fine flucuating between .40-.90
CEL on and Fuel trim code.
Id be so gratefull if anyone could help out, ive replaced in less than a yesr plugs fuel-pump/filter/plugs/MAF/Camshaft magnetic senors etc..oh and last week even went as far as suspecting the ECM and purchased a used one, got it virginized and cloned and still same thing.
TIA.
Engine runs fine/smooth etc. except for exccessive fuel consumption, used to get close to 700 klm/tank...now at 400/tank.
P0136, P0170, P0171 been trying to figure this out forever lol
The only parts replaced in regards to the CEL on were the MAF, upstream 02, and the ECM
