My wife was driving the wagon home from work and suddenly, the car started to feel a tad sluggish and jerky. So, she decided to exit the freeway and the car died at the stop light. Luckily, the car started again and drove the car home using the side streets. She noticed that the car felt more sluggish (loss of power), not as jerky, and the check engine light came on. According to a post in the forum, the fault codes indicated the following:

22 Crankshaft position sensor signal faulty
25 Knock sensors or engine control module faulty

Also, I noticed that the hose between the radiator and the thermostat housing (the one near the water pump) was collapsed. I never seen this before and I do not think this normal. Any thoughts?

My question is should I go ahead and purchase all the components or change them one by one. For instance, fix code 22 first since it may fix code 25 as other posts suggest.

Also, are these fixes a simple DIY jobs? What would have cause these components to be faulty? Any assistance is greatly appreciated.

Cheers.

CPS failure is common & most likely your problem.

If you aren't using 91 octane fuel you can get the code 25 for knock sensors.

As far as the hose goes...13-14 year old rubber hoses can fail. Also think of replacing the rad cap.

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Its most likely the CPS. Its an easy fix and the part is about 125$

I would go to pin 8 for code confimation first....

I would also check if the car has the new style OVP relay.

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A Dalton

Thanks, guys! I used the Built-in Diagnostic Module and the LED consistently gave me the same number of LED flashes after four tries. I am not familair with the pin 8 procedure. I used the post below to determine the code results:

E320 16 PIN DTC Charts inc. pin 8, pin 14

Is there something else I need to do? I already ordered the CPS part from Phil.

Cheers.

The Built In DM only gives you Emmisions related codes.
The actual detected faults you want to be concerned with are the ones directly from Engine Management of the HFM module . That is at pin *8 and if you go back to the site you were at , you will see how to go there with a simple tool.

Also check archieves for OVP .

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A Dalton

Looks very straightforward enough. I'll purchase the electronic parts tonight. I'll let you know what codes come out from the reader. Now, I'm still assuming that I should go ahead and and replace the CPS, correct? Doesn't the DM cause the Check Engine light to turn on, anyway? Maybe I should reset it and read the codes again?

You are assumimg the codes means to change a part...codes are system activated , not part specific.
An EGR code seldom is remedied by changing an EGR valve...but futher testing of the EGR SYSTEM will find the cause of the fault in the system.
And checking codes in the actual modules is best b/c they are often coupled up with other codes which helps pinpoint the cause of failure.

Also, on your chassis , an OVP relay can cause all kinds of codes b/c it is power feed for the modules, along with the wire harness issues.

Changing parts b/c of a code will bankrupt you real fast. Find the cause.
The OVP relay had a modification change and as I stated , I would see if that part has the new part # on it before I changed anything. And look for cracking wire insulation.
If you already ordered a CPS, go for it..but don't be surprised to find it not to be the conclusive fault. And this is not to imply that the CPS is not the cause of the fault.

Get the HFM codes..you will find much more info by going to the other modules...and you will have the tool for further issues, as that chassis is the last one with owner access Flash Formated codes ....[ OBD1]

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A Dalton

The code reaser was built to specs and the results were codes 25 and 33. I checked three times, just to be sure. What do the codes mean?

I finally found the OVP and the only numbers that are showing are 89 7219 000 and 140901. Is this the old one or the new one? Time to change?

On my 95 E320 with mysterious stumble and multiple codes, the culprit turned out to just be the MAF.

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Prost!

This thread has the code list: Linky

Yours are interesting, don't know what to make of them.
25: CMP sensor not recognized or implausible
33: Maximum retard setting on at least one cylinder has been reached or the ignition angle deviation between the individual cylinders is greater than 6 degrees crankshaft angle

I think CMP is the camshaft position sensor.

- JimY

[QUOTE=jcyuhn;1950879]This thread has the code list: Linky

Post # 5....

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A Dalton

Clear the codes and see what comes back .
How is the Harness insulation? Specially at the Cam sensor.
I would also pull the OVP and see if there is any poor connection /tracking/burn at the socket pins..

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A Dalton

From post#10, the MAF was replaced about three years ago by the dealer. Yeah, ouch!

I was working on the car too late last night to realize that the codes from PIN 8 were already posted, Sorry!

When I removed the OVP to check on the part numbers last night, the harness looked good and the socket was clean, including the pins. I could not see anything obviously wrong with it. Does removing the battery constitute the same act as clearing the codes since I removed the battery when I was checking on the OVP. When I started the car the CELamp was off and then came on after 5 minutes. Then, I checked the codes again using the code reader. Same code results as before.

I will check the harness on the CMP tonight and will let you know. If the harness is good, should I go ahead and change the CMP?

When you list the codes , you must mention which PIN they came from...

You want DM/PIN 8/ PIN 14 to see what code coupling is present.

If one has a CE lamp , that means the DM has codes and that the Emmissions module [ N/59] has detected a fault that will affect emmissions...but many of those codes actually come to the N/59 from the other modules , and those will be more specific. That is the reason for the tool. If a code on PIN 8 does not effect the emmissions mandate , then it does not talk to N/59 and a CE does not appear. But that does not mean there is no fault..it just is not an emmissions RELATED fault. Only DM registers those faults and only DM lights CE lamp..........hope that helps explain the system.
So, if we see a DM code and then we see a different code from one of the engine Mnagement modules [ 8/14 ], thay are said to be coupled and many are commonly coupled, helping us in an accurate system failure or remedy.

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A Dalton