Driving home from Vegas one weekend, my CEL came on and it took out my overdrive. I stop at Auto Zone on my way home and they read both Knock Sensors. I knew the harness had been old and brittle so I buy a new harness and 2 new sensors. Replace it all, take it out for a test, CEL comes back on trying to shift from 3rd to 4th.
Dad says it's likely the PCM. Find a junk yard that has the correct PCM, and plug it in. Just as I start to crank, my dad remembers the anti-theft. The anti-theft light still blinks when I turn the key to on. It will not start. It'll crank for days, but will not start.
Does anyone know a way to bypass the anti-theft without have Toyota re-flash the whole PCM? I am tired of not having overdrive and my gas mileage is awful, even though I am only driving it a max of 5 miles a day.
PLEASE HELP!!! I searched and I didn't find many threads that were similar to my issue. If I didn't search well enough, just link a thread in here that will help.
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Aftermarket sensors can be "bad" right out of the box, meaning they are simply not comparable with the OEM parts and you'll keep throwing codes. The ECU doesn't only look for knock, it looks for a specific waveform and if it doesn't see it, it will go into limp mode and set a knock code.
Aftermarket. Used an OE harness. I seriously doubt the sensors are bad.
well, if the sensors were functioning ok then the ECU would not throw the code.
- I would find some used sensors from another vehicle (same model) and install those.
- perhaps the (both?) pins are pushed back into the plug on the ECU termination end
Another option is that the engine has a fault ?
- is knocking, timing off, bad injector or two,
- worn rods, or pistons or main bearings.
- not all codes which are thrown relate to the sensor being faulty, sometimes its another sensor (Maf failure causing O2 sensor CEL) or a genuine mechanical fault.