300M, Concorde, LHS, New Yorker Discuss the Chrysler LH platform cars within.

Accuracy of Code Readers

Old 12-03-2014, 11:33 AM
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Join Date: Jan 2011
Posts: 3
Default Accuracy of Code Readers

Advance Auto Parts reported a code "P0456" then wrote 4 lines on a scratch paper:

Leak Detection
Pump very small

I didn't see the screen... just the note.


Q1) How accurate are these devices in a clerk's hands? (1 = not at all; 5 = very accurate)

Q2) Does "Pump" REALLY mean the device has isolated the small leak to be emanating from the pump itself or is this "painting the diagnosis with a broad brush" so to speak and the leak could be anywhere from the canister to the engine or wherever?
Old 12-03-2014, 07:08 PM
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Join Date: Sep 2012
Location: Somerset N.J.
Posts: 396

Accurate enough, actually you could read that code (and others) with the "key dance"
Could be as simple as a loose or bad gas cap seal.
What year? 99-01 LDP system
02and up NVLD
Many discussions here: www.300mclub.org
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