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Originally Posted by voz1
jim, Good to hear from you. The check engine lite is on. Pulled coded and got one for crank sensor (L-5) Car is running different, better, more power, smother idle. I thought is was from bank firing the injectors because fuel mileage seems to have taken a hit. The car is a 95 with 83,000 sensor can be had for around 50 Bucks so I feel not a bad investment. I was just wondering how tough it is to get at. I know it's at the rear of the engine but I havent had the time to really scope out its location. BTW your fan relay sure is working great here in this New jersey heat wave. Thanks Ed
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. . Russell (nice name; my middle name) provided show where it connects. But before you replace it, please check it with an ohmmeter to see what the resistance is.
Here's the story: A year or so after I bought my S500 cpe, the
exact same thing happened to my car. At that time, I knew very little about the car and after t/s the problem, it was
NOT the CKP sensor but, the DI Module itself. The resistance was 840 ohms and it was solid.
It was a strange failure; it could not be reset. Have you tried to reset it?? So the CE would re-light immediately, even though the car ran fine. "Active" faults can
NOT be reset since they are occuring
now.
Bottom line: I replaced the DI Module with one that I found out of NYC junk yard (PartTrackers network in the LINKS section of my page) and that's about 6 years ago.
The problem was this: the DI Module has a major function keeping the car running, etc. but it also has FAULT memory that is there to store DTCs. In this DI Module the fault memory portion that stores the CKP fault went 'bad' indicating a bad CKP sensor. The module itself was fine but had a bad memory bit that controlled the CKP sensor. Since it's a 'running' fault, the CE is programmed to come on immediately.
So it was a memory fault not the operaing portion of the DI Module that went bad. But it had to be replaced just to get the CE to go off.
If you measure an acceptable resistance, then I wouldn't replace it w/o first 'swapping' the DI module. The CKP sensor isn't that expensive ($150) but you will be dissapointed when it doesn't go out!
PS: almost forgot . . . if the CKP is REALLY bad, the car won't run!!