Question about 2003 Mazda Protege
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Posted on Jan 02, 2017
Diagnostic Trouble Code (DTC) P0660 has a generic description of "Variable Inertia Charging System (VICS) Solenoid Valve Circuit Malfunction"
Diagnostic Trouble Code (DTC) P1569 has a generic description of "Variable Tumble Control System (VCTS) Solenoid Valve Circuit, Low Input"
Diagnostic Trouble Code (DTC) P1250 has a generic description of "Pressure Regulator Control (PRC) Solenoid Valve Malfunction"
These are all CIRCUIT failure codes. The circuits to each of these solenoids are SEPARATE circuits. The failure of one of these circuits SHOULD have no effect on the other two.
I did do a Technical Service Bulletin (TSB) search for your vehicle to see if there were any known problems that regularly cause these codes or if there are any computer programming issues that can cause these. The search came up negative - no known issues for ANY of these codes.
If your check engine light has been on for quite a while, it is possible that each of these failures occured at separate times and you simply did not know about the second and third failures because the check engine light was already on due to the first failure. Technically, you have three separate circuit failures no matter how it came about.
However, if these all showed up at the same time, I would be taking a hard look at the engine control wiring harnesses. It is that time of year for lots of rodent damage. They like to crawl up into warm engine compartmens and chew on things like wiring harnesses and vacuum hoses.
Another common denominator would be harness connectors. These wires all go through the same connectors, including the PCM connectors. It is possible that moisture and corrosion in a connector is shorting all of these circuits out. If you do not see any obviously damaged wiring harnesses, I would be taking connectors loose and examining the pins inside them.
Other than this, the only thing I can tell you to do is to diagnose each circuit individually. One may have a bad solenoid, while another has a loose connector pin, while the third one may have a broken wire. However, I think there is a real good possibility that if you find the problem with one of these circuits, the problem with the others will be close by.
Posted on Nov 17, 2011
Testimonial: "thanks for your help."
Check connections etc at MAP sensor. If all good, replace it. Erase codes & retry. How's vehicle running, idling, any black smoke out tailpipe?
Posted on May 12, 2009
Just had one of these with a maxima, the code is multiple random misfire, when a misfire occurs, to start is do the basics, replace the plugs, check fuel pressure, clean throttle body, and coolant is topped up. also I have seen if the O2 sensor is not working correctly is can cause a misfire, you will need a scan tool to look at what the O2 sensor is doing, o rby back probing the sensor (don't damage the O2 sensor wires). If it wires replace them as well, if it has coils they usually dont give that code if one fails, it will pinpoint that a certain coil if one fals.
Posted on Oct 02, 2009
That's a good question. Ask the parts store to look up the part for both vehicles, and see if the part # is the same.
Good luck to you.
Posted on Jul 04, 2010
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