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#1
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Obd Codes
Hi guys.my 1995 C280 has my CEL is on with the code PO505 idle air control system.
car is a lumpy idle when first started, and occasionally stalls out, but if you gently press the throttle to get the revs up and give it a few thousand RPM for a minute or so it is OK. It then runs aboslutely perfectly, never misses a beat, gives good power and acceleration and pretty good fuel economy. Any clues as to the best things to check out etc? thanks Carl |
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#2
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That code refers to a problem with the ISC/CC/EA computer..that computer has it's own set of codes relating to what is the REAL problem. A scanner designed for MB is needed to read those codes..
Throttle actuator failure is a common problem...as well as the brake lamp switch & neutral/safety switch. Scan computer & post results.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
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#3
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Thanks. it will take me a while to get the codes as the nearest Benz dealer is miles away. I got the OBD2 code from my own reader. I notice a common actuator problem is a non working cruise control. Mine also is inoperative so I guess I am looking at an actuator or the wiring to it. [ had the engine wiring harness replaced already ]
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