Engine runs well & has Crank Pos. Sens. P0335 & Cam. Pos. Sens. P0340 alarms in.
What is your question?
I installed a used Japanese long block and the Crank. Pos. Sensor and its tone/ reflector? ring installed weren't new and were without warranty. I have been driving it for 18 months with the P0335- Crankshaft Position Sensor A Ckt & P0340-Camshaft Position Sensor A Ckt & Service Engine alarms in yet the engine is not only running, it is performing well. I would occasionally clear the alarms but they would quickly come back in. A new Crank. Pos. Sensor and its tone/ reflector? Ring have been installed and the same alarms quickly come in again and the engine is still running well. Where the big problem comes is that with the Service Engine alarm in that is an automatic failure of the Bi-Annual CA Smog Test even if the tail pipe emissions were OK. I beginning to wonder if it's possible that the ECU could have a glitch that causes the alarms to trigger when they aren't real and yet keep the engine running fine. Also is the Powertrain Control Module (PCM) something different from the ECU?
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pcm and ecm same thing.These are the type of problems you have when you install a japanese engine,could be wrong distributor,maybe t-belt off one tooth? i recommend you take it to a certified shop and have the diagnose it.
It has been to multiple shops and the current one with the supposed all kinds of special extra diagnostic equipment told me both cam. & crank sensors tested good so it was either the t-belt off by one tooth or the PCM is bad. This was after they assured me a solid diagnosis if I brought it to them, to which I questioned this being a solid diagnosis. They checked the timing and it was correct, so they say it is a bad PCM. I find it extremely difficult to believe that the PCM would only fail in this one very limited way. That is, failure of the alarm circuit for only the cam/crank sensors while the engine runs as good as could be expected without those alarms in. The only thing all the shops agree on is that the alarms are false. I guess that the Mitsubishi dealer is the only place that could tell me absolutely if the PCM is failed or not. My theory is there is a short or ground in the alarm circuit (a wire in the circuit) that initiates the alarm code without the condition being real?
It has been to multiple shops and the current one with the supposed all kinds of special extra diagnostic equipment told me both cam. & crank sensors tested good so it was either the t-belt off by one tooth or the PCM is bad. This was after they assured me a solid diagnosis if I brought it to them, to which I questioned this being a solid diagnosis. They checked the timing and it was correct, so they say it is a bad PCM. I find it extremely difficult to believe that the PCM would only fail in this one very limited way. That is, failure of the alarm circuit for only the cam/crank sensors while the engine runs as good as could be expected without those alarms in. The only thing all the shops agree on is that the alarms are false. I guess that the Mitsubishi dealer is the only place that could tell me absolutely if the PCM is failed or not. My theory is there is a short or ground in the alarm circuit (a wire in the circuit) that initiates the alarm code without the condition being real?