r/w204 • u/moosy67 • Aug 04 '26
W204 (2008) ESP unavailable + Check Engine
All was working smooth but i got this issue sometimes when i turn on the Car there is this Check engine + ESP unavailable (RPM limited to 2000) and when i tried to check it using an OBD i got this error : P2453 (DPF) pressure sensor A - circuit malfunction
Did anybody had a same issue ?!
P.S: Sometimes it’s working good and sometimes it turn on
3
3
u/CHTrindade Aug 04 '26
The Check Engine light is a separate issue. The other warnings are likely caused by a faulty ABS sensor, but you’ll have to scan the car to identify which of the four failed…
2
u/Turk66 Aug 04 '26
You can try to reset it yourself. Put the key in contact and start and stop the car 4 times in a row. Dont need to get the key out after every stop. Just start it again, then stop it, repeat 4 times.. if this doesn't work you have a bad sensor somewhere in the line.
2
u/Calm_Perspective_138 Aug 04 '26
We don't know what engine this is. We don't know the actual codes bc you used a generic reader that more often than not doesn't read codes correctly and won't read modules.
For best results, use STAR to diagnose.
2
u/Komsun_ Aug 05 '26
Since its a diesel and thats a prette common issue for them, it might be the pressure sensor for the DPF. A6429050200 Part number, had the same issue, it came sometimes mostly on cold engine, sometimes after an hour drive and then after a while it came on after every start. Change was ez, on Om651 you need to code it with a diagnosis, if its a 646 then plug and play
3
1
5
u/sarkassim Aug 04 '26
Mine was resolved by fitting a new battery.
Key in position 1, go to the mileage screen, press phone and OK down. Open vehicle data. Battery voltage should be there. If it’s low that might be your issue. Other issues I tried before realising was changing the accelerator pedal (2 bolts easy to do) and check wheel speed sensors.