Originally Posted by
LagDan
At 143,800 Kilometer last week my 2005 N/A XF had is first no start condition that only CPS sensor normaly give and sometime camshaft sensor also . . . the starter motor was engaging and turning the engine but, the engine was not starting .After the motor cool down for a while, it started and I was able to drive the 130 kilometer whithout problem on the way to get home.
Yesterday my OBD II took out the DTC P0335. Cleared the code . . . car engine started fine right after . Since I carry a spare CPS and it was a fine day to work in my garage, took the CPS out and followed the 2005 shop manual procedure . . . section 9 page 397 to 403 . Since voltage at the connector on circuit 1 and 2 was below the recomended voltage and that the tone wheel pulse ring checked OK , at # 13 it say " change the CPS " it then brings you to the last page at the #14 where it say " The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition " . . . what about the CPS diagnostic ?
In my youg time I was a car mecanic and définitively was not a part changer. So i connected an OMH meter to the CPS and took a hair dryer and heated the old CPS and the circuit opened . . . cooled it and the circuit came back. Was able many time to reproduce the condition where this CPS would have cause a no start condition or a stall in the trafic, when engine get hot egnough . Ran the same test on my spare CPS but did not get an open circuit.
Installed my spare one bought from them in 2016
Bosch 0031532828, 4440 Crankshaft Position Sensor; Rear; EZL Sender at Rear of Engine - Dodge, Mercedes | 0031532728 0261210170 05080352AA BSH076114 (autohausaz.com) This sensor is not identified as a Bosch but the thickness of the terminal are the same and it is mark " Made in Germany ".Their is no numbers on it. Just to be confident that i received a good spare, road tested it for two weeks in 2016 .
Now . . . How many place are selling marqued made in Germany but unmarked Bosch and no numbers at all on the CPS ? How many have subsequent problems following the installation of these CPS ?
The defective OEM original that my 2005 XF had on it is identified with the brand name Bosch, is marked has " Made in Germany " and have two series of numbers
0261210171 /
031532728 .
Where these numbers replaced by
0261210170 /
0031532828 ?
Daniel
As I recall there was a reduction of Mercedes CPS parts that were interchangeable. This initiated a reduction in the Bosch parts to match. Hence some part numbers became obsolete although some old parts remained on shelves until they were sold. The newer part numbers were then the only ones being sold. All this happened some ten years ago I think.
If you are the original owner then you can say you have quoted the initial CPS part number, if not it could have been changed before. The Mercedes part # is
026 121 01 71, I doubt #026
121 01 70 was the later part. The “71” part replaced the “70” part, the “01” was the first edition of the part, if it had been modified it would have become “02”.
The Mercedes numbering system is complicated.