My Acura 1997 SLX V6 has an engine check problem and was brought to a mechanic. The latter cleaned the EGR valve and intake manifold due to carbon build-up, accordingly. And erased or cleared it. After a week and thereafter, the check engine light appeared. I returned to the mechanic and I was advised to run my car 2500 rpm but not exceeding 5000 rpm or of its limit occassionally. On the third visit I presented the same problem, and he diagnosed it with another problem P1391(Manufacturer Power Train Module Problem) which he could not fix. He advised me to go to a Specialist.What is this problem all about, and, what should be done? Its mileage is 138,000.

ryagudelo wrote:

My Acura 1997 SLX V6 has an engine check problem and was brought to a mechanic. The latter cleaned the EGR valve and intake manifold due to carbon build-up, accordingly. And erased or cleared it. After a week and thereafter, the check engine light appeared. I returned to the mechanic and I was advised to run my car 2500 rpm but not exceeding 5000 rpm or of its limit occassionally. On the third visit I presented the same problem, and he diagnosed it with another problem P1391(Manufacturer Power Train Module Problem) which he could not fix. He advised me to go to a Specialist.What is this problem all about, and, what should be done? Its mileage is 138,000.

I was under the impression that the P1391 was for a CMP Sensor Bank 2 Short To Ground. Are you having any running problems? A miss or something?

This is in Addendum to my question which was diagnosed by a Mechanic P1391on my 1997Acura SLX with 138,000 miles, and the engine check continously appeared. There is no running problem or a miss or something.The mechanic gave me a wrong interpretation of the code to complicate the problem of my car. The car runs okey and there is no problem except the check engine light with the said code. I have a suspicion that the car is giving a false reading? What should be done? Would there be parts to change, like changing the O2 sensor? Is there a mass airflow problem causing a false reading? How much man hour labor cost?

ryagudelo wrote:

This is in Addendum to my question which was diagnosed by a Mechanic P1391on my 1997Acura SLX with 138,000 miles, and the engine check continously appeared. There is no running problem or a miss or something.The mechanic gave me a wrong interpretation of the code to complicate the problem of my car. The car runs okey and there is no problem except the check engine light with the said code. I have a suspicion that the car is giving a false reading? What should be done? Would there be parts to change, like changing the O2 sensor? Is there a mass airflow problem causing a false reading? How much man hour labor cost?

I understand why he kind of miss lead you. The code P1391 is not listed for your vehicle. If you have a chiltons manual, it should list the way to read the engine code without a scan tool. You basically just connect the Service Check Connector and that will make your Service engine soon light blink. Count the number of blinks in each cycle and refer to your manual as to what it is faulting. Most likey it is going to fault your Crankshaft sensor assembly. But I would try and verify that is your problem before spending the time and money replacing it.

Hi! This is an Adendum question that I would like to know. Where is the Service Check Connector in my car Acura 1997 SLX? Secondly, what is Manufacturer Control Ignition System's misfire? In a situation of misfire, what should be done?

that code is for the "G" sensor. it works when the vehicle is in 4wd to sense deceleration. i'm pretty sure its located under the center console.