P0170 fault code for fuel trim malfunction Bank 1 of 1 - Page 2 - Mercedes-Benz Forum

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Old 03-04-2011, 04:57 AM   #11 (permalink)
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Date registered: Apr 2010
Vehicle: 1996 C 280 2003 BMW 330 Ci Conv 2011 Lexus IS 350
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Hi again, In the event that I will need a new MOT valve, then who sells a genuine? is it BOSCH ? where did you get yours? I am not sure yet that I need one. I just want to be ready to order should the need arises. I will try your suggestion in getting rid of the "Check Engine" light first and see what happens. One more thing, where is a good Under the hood complete diagram to be able to navigate and understand what is what I am looking at under the hood of all these parts, is there a schema or PDF or even a CD/DVD? or even online for the 1996 C 280 please ? Thanks
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Old 03-04-2011, 07:25 AM   #12 (permalink)
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This morning, I turned the key untill all lights light up, but did not started the engine, I waited for over 1 minute no lights turned off. I then proceeded cranking the engine, so I can go to work. The "Check Engine" light is still "ON"
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Old 03-04-2011, 01:56 PM   #13 (permalink)
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This morning, I turned the key untill all lights light up, but did not started the engine, I waited for over 1 minute no lights turned off. I then proceeded cranking the engine, so I can go to work. The "Check Engine" light is still "ON"
New MOT is $150 and basically a dealer only item. Sounds like yours is fine.

If the CEL is still on after that little trick then there's a real powertrain code- it takes a long while for it to reset itself if you don't use a scanner.

Find someone who has one or just buy one for $20 bux at the pawn shop or a Harbor Freight.... Any OBDII compliant scanner will suffice.

rjp
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96 C36

70 Pontiac LeMans Sport (built 462" Poncho)
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Old 03-04-2011, 02:00 PM   #14 (permalink)
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PS the engine in these cars is an M104- any W210 / E320, late w124 / 300e w202 C280, C36 will have basically this style MBZ engine...

rjp
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Old 03-04-2011, 02:03 PM   #15 (permalink)
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I just used the OBD II and found this time TWO codes, the usual one of P0170 but now a new one P1700, I then cleared them. and drove the car for about 10 miles. NO lights so far, let us see what happens. Now I am running normal with no lights on dash.
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Old 03-04-2011, 02:30 PM   #16 (permalink)
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I just used the OBD II and found this time TWO codes, the usual one of P0170 but now a new one P1700, I then cleared them. and drove the car for about 10 miles. NO lights so far, let us see what happens. Now I am running normal with no lights on dash.
if it flips out again, scan the car.

If NO CODES show up, then do the key trick.

don't reset if there are no codes, don't drive around with scanner plugged in it pisses the car off and the CEL goes on in protest.

I know all about this since I chased my own tail for a month - I would drive around with the scanner plugged in since the CEL always came on but no codes then discovered it was the tester doing that to the car.

rjp
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Old 03-05-2011, 08:37 PM   #17 (permalink)
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Originally Posted by RANDY P View Post
if it flips out again, scan the car.

If NO CODES show up, then do the key trick.

don't reset if there are no codes, don't drive around with scanner plugged in it pisses the car off and the CEL goes on in protest.

I know all about this since I chased my own tail for a month - I would drive around with the scanner plugged in since the CEL always came on but no codes then discovered it was the tester doing that to the car.

rjp

The check "Engine LIGHT" came back ON. go figure!!
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Old 03-05-2011, 08:55 PM   #18 (permalink)
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Hi Randy P, Is this a good product? Equus Products, INC.
I found it at Amazon for $129 http://www.amazon.com/Equus-3130-Diagnostic-Playback-Capability/dp/B000KID31K/ref=sr_1_3?ie=UTF8&s=automotive&qid=1299387254&sr=8-3
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Old 03-05-2011, 09:15 PM   #19 (permalink)
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In essence that thing is just a standard OBDII reader with the I/M monitors on the same screen.

Check this one out. Much cheaper- also I have the one on this site for $129- it's fine.

Actron/OBD II code reader for 1996 and newer vehicles (CP9125) | Code Reader | AutoZone.com

Go stop by a pawn shop bet you can get one there for $30 that does some nice stuff. Not like you'll need it often to warrant an expensive one...

PS- do the key trick now and see if it goes away.

rjp
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Old 03-09-2011, 06:49 AM   #20 (permalink)
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I contacted The Brinson Company since they are located next door to me here in Virginia, They said that for my car I cannot buy just the MAF INSERT Sensor, cause it is round in my car 1996 C 280. The sensors only part is rectangular for newer than 1996. they quoted me $250.00 So now I rearened that I will have to buy the whole MAF assembly. Any thoughts ?
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