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Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53904
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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P1700, P0170 P0303 codes, I took it to the shop last week

Customer Question

P1700, P0170 P0303 codes
JA: Just to clarify, what's the exact code? And have you tried to reset it?
Customer: I took it to the shop last week for a scan and diagnostic.
JA: What is the model/year of your Mercedes?
Customer: 1995 C280
JA: Are you fixing your C280 yourself? What have you tried so far?
Customer: No I'm not DIY much as I would like to. but I have been giving my C280 a lot of TLC and so far it hasnt quit on me yet.
JA: Anything else you want the mechanic to know before I connect you?
Customer: but the mechanic fixed a vaccum leak...
Submitted: 9 months ago.
Category: Mercedes
Expert:  Marty replied 9 months ago.

Hi, welcome to Just Answer. My name is***** you give me a little background on the car? Are these the current fault codes? How is the car running? Has any work been done in an effort to repair the fault codes?

Customer: replied 9 months ago.
There was work done to take carevof the vaccum leak. Performance improved somewhat but the check engine light came back on. And there seems to be a jerking and clunking noise only happens at 1800 rpm
Expert:  Marty replied 9 months ago.

Okay, looking at the fault codes I would suggest the mechanic address the P0303 code next. I suspect that the P0170 code may have been solved by repairing the vacuum leak. If that code is still there you may have more vacuum leaks or there may be a fault with the mass air flow sensor of with the fuel pressure. The P0303 is probably caused by a bad spark plug or plug wire or ignition coil. The P1700 is a transmission upshift delay fault code. The mechanic should check the vacuum box on the kickdown cable to see if it is leaking vacuum.

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