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2001 C320 OBDII Readout question
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From: Maryland
C320
2001 C320 OBDII Readout question
Did a search and couldnt find anything here is what the read out says....but before that the problem Im having is, during braking or decelleration it has an intermitent rough idle and also hesitates when taking off but of course not everytime.......
Definition:
Fuel Trim Bank Two Condition
Explanation:
The ECM has detected a rich or lean air/fuel ratio condition on bank two
Probable Causes
If bank one and two are set togehter suspect a fuel condition or MAF sensor Fault
Failed HO2S21
Iginition Misfire condition
Fuel injector problem
Engine mechanical condition
The PCM has determined that during testing the fuel compensation valvue for bank 2 exceeded the specified range Bank 1 identifies the location of cylinder#1 while bank 2 identifies the cylinders on the opposite bank.
OK I did clean and reinstall the MAF sensor, not sure what HO2S21 fault is......and does anyone know a good MB or import mechanic in say Columbia, Clarksville or Laurel MD??? Can't check the injectors because I dont have a pressure gauge or not even sure what the range should be, including the expected voltage.....?
Definition:
Fuel Trim Bank Two Condition
Explanation:
The ECM has detected a rich or lean air/fuel ratio condition on bank two
Probable Causes
If bank one and two are set togehter suspect a fuel condition or MAF sensor Fault
Failed HO2S21
Iginition Misfire condition
Fuel injector problem
Engine mechanical condition
The PCM has determined that during testing the fuel compensation valvue for bank 2 exceeded the specified range Bank 1 identifies the location of cylinder#1 while bank 2 identifies the cylinders on the opposite bank.
OK I did clean and reinstall the MAF sensor, not sure what HO2S21 fault is......and does anyone know a good MB or import mechanic in say Columbia, Clarksville or Laurel MD??? Can't check the injectors because I dont have a pressure gauge or not even sure what the range should be, including the expected voltage.....?
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What OBDII reader did you use to get such a reading?
I'd immediately check the crank position sensor and Cam position sensor on that one.
Also, test your O2 sensor on that side as it may be malfunctioning since there are 2 per bank.
-Ben
I'd immediately check the crank position sensor and Cam position sensor on that one.
Also, test your O2 sensor on that side as it may be malfunctioning since there are 2 per bank.
-Ben
Last edited by Rev 2 Liv; Jun 26, 2008 at 06:38 AM.
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From: Seattle
w203 m112
jhartmac, I believe I have been having this same issue for quite some time... I still havent been able to figure it out, but maybe now that you've got a much more indepth read out than I do... maybe someone can shed some more light on this for us.. Ohlord (rob)?
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
What
was the code?
Not what it said the probables were.
was it p0173?
any other codes in the pending section?
How many miles on the car?
ohlord
give me a call and let's plug it in to my scanner and go over it with a fine tooth comb.
OP post the actual code#
ohlord
Not what it said the probables were.
was it p0173?
any other codes in the pending section?
How many miles on the car?
ohlord
give me a call and let's plug it in to my scanner and go over it with a fine tooth comb.
OP post the actual code#
ohlord
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From: Maryland
C320
Thanks guys I will check the readout again when I get home but I think it was p0173 and the car his 85K on it, I bought it used with low mileage..........and thanks for the 02 sensor headsup I ll check those too....
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W203
If you're getting a "fuel trim" code there should be a code of whether you're running lean or rich. At 85K, I suspect O2 sensors.
What maintenance has been done on the car?
- fuel filter?
- gas additives? (ie carbon build-up, injector cleaner)
- spark plugs?
Could be you just need some general maintenance to bring the car back to new.
What maintenance has been done on the car?
- fuel filter?
- gas additives? (ie carbon build-up, injector cleaner)
- spark plugs?
Could be you just need some general maintenance to bring the car back to new.
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From: Maryland
C320
It is the P0173, and the car has never had plugs replaced or wires, or fuel filter, speaking of that does anyone know the fuel filters location? It has had regular oil changes with syn, every 6k, has the K&N's air filters I will check price and maybe just replace the 02's just be safe and maybe the fuel filter too, hopefully its not any injectors..........
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It is the P0173, and the car has never had plugs replaced or wires, or fuel filter, speaking of that does anyone know the fuel filters location? It has had regular oil changes with syn, every 6k, has the K&N's air filters I will check price and maybe just replace the 02's just be safe and maybe the fuel filter too, hopefully its not any injectors..........
Fuel filter is located roughly underneath the passengers side rear seat. You have to take off the skirt to accesss the fuel filter. It's recessed in there. Plus, you have to clamp off the fuel lines and stuff.
Fuel injectors are an unlikely scenario, but there is a chance they are going berserk.
Before spending all this money, why not go to a shop, spend $100 for diagnosis, and go from there?
-Ben
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From: Maryland
C320
Yes I like the diagnostic suggestion, does anyone happen to know where I can get one in Maryland? or is the dealer the best place to go. Always been a mechanic all my life but.........we can't do everything right.........LOL
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Also, just measure each injector with a multimeter to see if all are within the same range.
Last, motor mounts on these cars do go bad and that may be contributing to the cause of your rough idle.
If you got the time, i'd also pull both downstream 02 sensors and measure the resistance of both.
Hell, pull all 12 plugs and inspect & replace 'em.
I sometimes wish someone offered the rental of a Star Diagnosis multiplexer/T20/30 laptop.
Last edited by Rev 2 Liv; Jun 29, 2008 at 03:56 AM. Reason: delete
