My check engine light just came on over the weekend...
Code 27 - FSM says - one of the injector control circuit output drivers does not respond properly to the control signal.
The engine doesn't throw the code until the vehicle is warm. I took a screw driver and touched the top of each injector while the vehicle is running to verify they are all firing and could feel each pulsing. The vehicle idles like it's misfiring on one cylinder but does not miss when the RPMs pick up.
I had the dealer replace the PCM less than a year ago. This is where I'm leaning since the truck runs fine until it gets to operating temperature.
Any other insights?
Justin
Code 27 - FSM says - one of the injector control circuit output drivers does not respond properly to the control signal.
The engine doesn't throw the code until the vehicle is warm. I took a screw driver and touched the top of each injector while the vehicle is running to verify they are all firing and could feel each pulsing. The vehicle idles like it's misfiring on one cylinder but does not miss when the RPMs pick up.
I had the dealer replace the PCM less than a year ago. This is where I'm leaning since the truck runs fine until it gets to operating temperature.
Any other insights?
Justin
