Question about Ford Expedition
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Posted on Jan 02, 2017
P0645=A/C Clutch Relay Control Circut, This is the code, how it affects your vehicle I do not know, I take it your a/c does not work? Hope this helps.
Posted on Aug 05, 2010
The problem is any PCM other than the one installed will need to be programmed.
modulemaster.com may be able to rebuild for a couple hundred bucks but the car will be down for 10 days or so. If they can rebuild it its plug and play. No programmingwill be neede.
Posted on Apr 03, 2010
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Oct 08, 2011 | 2000 Chrysler Concorde
A code P0601 in most cases means the PCM has gone bad. This is possibly due to a short-circuit inside the PCM. Or, if you disconnect the wires/connector from the PCM while the battery is still connected, that may also cause this code.
With a P0601 OBD-II trouble code, the most common fix is to replace and reprogram the PCM. In a few cases the dealer may be able to reflash the PCM and get it working. But more than likely the PCM will need to be replaced and reprogrammed (we recommend you take it to a dealership for this). The good news is it *may* be covered under your emmissions warranty. So even if you're out of bumper-to-bumper warranty or powertrain warranty, check your warranty guide or dealer to see if this is covered.
Other people have reported that they cleared the code only for it to return again and again. Keep in mind that most shops can replace the PCM but not all can program it.
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