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The title says it all.
I have a P0650 indicator lamp (MIL) control circuit malfunction. I only found this because I failed my emissions test due to this code being present. The research I have done says that it meas that the ECM is sensing the the MIL (Check Engine Light) in a state other than the commanded state for more than 5 seconds. This could mean that the light is on when commanded to be off or it is off when commanded to be on.
My case is the MIL never lights, When I start the truck and it does the bulb check the MIL does not light.
According to the service manual it is one of 3 things, A bad instrument cluster, a bad ECM or a bad wire between the 2.
I believe the MIL is an LED so not likely burned out and the 2 other issues also point to something other than a bad bulb.
I can not renew my plates till I get thru emissions testing.
Details
1. The compass and the indicator for the cruise control are also intermittent, not working at the moment, and use the same circuit from the ECM to the instrument cluster. I believe that the MIL is on the same data line.
2. When the compass and cruise indicator work or don't work they always both have the same state.
3. What ever state the cruise indicator and compass are in when I first start the truck they always remain in that state for that entire drive cycle.
I am hoping that I can get this fixed this week, next week I go in for surgery and will be laid up for 3-6 months, but will need the truck to get around. I hate to take it to a stealer as I just know it will be the most expensive part possible.
I have a P0650 indicator lamp (MIL) control circuit malfunction. I only found this because I failed my emissions test due to this code being present. The research I have done says that it meas that the ECM is sensing the the MIL (Check Engine Light) in a state other than the commanded state for more than 5 seconds. This could mean that the light is on when commanded to be off or it is off when commanded to be on.
My case is the MIL never lights, When I start the truck and it does the bulb check the MIL does not light.
According to the service manual it is one of 3 things, A bad instrument cluster, a bad ECM or a bad wire between the 2.
I believe the MIL is an LED so not likely burned out and the 2 other issues also point to something other than a bad bulb.
I can not renew my plates till I get thru emissions testing.
Details
1. The compass and the indicator for the cruise control are also intermittent, not working at the moment, and use the same circuit from the ECM to the instrument cluster. I believe that the MIL is on the same data line.
2. When the compass and cruise indicator work or don't work they always both have the same state.
3. What ever state the cruise indicator and compass are in when I first start the truck they always remain in that state for that entire drive cycle.
I am hoping that I can get this fixed this week, next week I go in for surgery and will be laid up for 3-6 months, but will need the truck to get around. I hate to take it to a stealer as I just know it will be the most expensive part possible.