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Car Forum / Driving, Maintenance, Tuning / General Car Topics / February 2007Mazda p0715
My check engine light came on andthe engine code is P0715. The read says, "Speed sensor circuit malfunction". I bought a new transmission speed sensor and installed it and reset the check engine light. The light came back on with the same code. What other possible causes should I look for? On Feb 1, 7:56 am, "aan...@gmail.com" <aan...@gmail.com> wrote: > My check engine light came on andthe engine code is P0715. The read > says, "Speed sensor circuit malfunction". I bought a new transmission > speed sensor and installed it and reset the check engine light. The > light came back on with the same code. What other possible causes > should I look for? 1. How many "speed sensors" does your vehicle have? Mine has 6: Crankshaft, transmission, and on each wheel for the ABS. Did you replace the correct one? 2. Did you verify the circuitry between the sensor and the computer? By disconnecting the computer's connector, checking continuity/ resistance pin-to-pin? 3. This sort of thing is very hard to do without the factory shop manuals and schematics. Sometimes dealers are helpful if you ask intelligent, pointed questions; sometimes public libraries have factory shop manuals. Good luck.
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