E-Class (W210) 1995-2002: E 200, E 220D, E 240, E 290TD, E 300TD, E 200, E 240, E 280, E 320, E 420, E 430 (Wagon, Touring, 4Matic)

Check Engine On- P0170, Right Bank, 97 E420

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Old Aug 4, 2004 | 06:39 PM
  #1  
Dave in ATL's Avatar
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97 E420
Check Engine On- P0170, Right Bank, 97 E420

I researched the posts on this, but most of the diagnosis has revolved around both a 0170 and a 0173 code, indicating a MAF problem. I am showing only a P0170 right bank reading and the check engine light stays on. I opened things up and found a completely decomposed vacuum line (from valve cover to throttle body) which I have replaced. It still takes half pedal to get the car moving, but after that its a rocket ship. With the hose replaced, why do I still have sluggish get up from a stop light? Is it something that must be reset before the on board knows its fixed? Or was the hose just a side trip and the real deal is gonna cost me?

Any thoughts?
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Old Aug 4, 2004 | 08:08 PM
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E-Klasse's Avatar
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From: Arizona, USA
W205 C300
Did you try to reset your Check Engine Light by disconnecting the battery for a while? It still could be a MAF problem or was that the only vacuum leak or bad hose you had?
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Old Aug 5, 2004 | 06:17 PM
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97 E420
Yep, a few minutes ago I disconnected power, waited two minutes and reconnected. The CEL went away and car idled nicely. Took it for a hard lap around the neighborhood, and A-OK rocket ship action. Get to my stop sign and the engine dies with the ASR light illuminated. ??? Restarted no problem and the CEL "Engine Electronics" light is back on.
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