lukasborecki

Greetings all,
please can anyone help me with this issue, i have cl500 w215 pre facelift model. I get check engine light on constantly. Scanning with star brongs out codes
P0444 purge valve stuck closed.
P0141 downstream o2 sensor heater open circut
P0161 downstream o2 sensor heater open circut

I have swapped parts with working second hand parts but No change.
i recently chcnged fuel pump. If that could cause any of the errors.

I have been advised this can be ecu issue, but seeking confirmation of higher minds before i throw money at issues.

Any advice apperciated

Plutoe

your FUYAA wont work here get a factory or equal scan to locate the real fault as this aint a front yard job

lukasborecki

Hi Not sure what FUYAA is, i use STAR and these are common codes it came up with, attached is photo of what STAR diagnosis shows.

lukasborecki

Forgot to say thank you for your reply, do appreciate the advice, i did checked wiring etc to best of my abilities, most wondering is the fact that when i hook up multimeter to Purge Valve connector while engine is running, i can see small voltage jumps (as expected) but only to about 4 volts... tomorrow i will try to check other end of the purge valve connector i think it ends at charcoal canister under rear wheel lining.. hoping maybe coroded plug there causes too much resistance to the circuit??

lukasborecki

Thanks all for checking this post, today i started tracing all repairs done to the car recently and i forgot i have changed front driver sam. That had relay switched to M rather than N position, plus fuse 48 was missing... Ive corrected this, and voila.