bluesq
Member
- Joined
- April 17, 2019
- Messages
- 18
- Reaction score
- 3
- Year, Model & Trim Level
- 2008 Explorer Limited 4x4
I just started getting a Service RSC Now message with beeping that comes up ever 5 minutes or so. The traction control light is also illuminated as is the check engine light.
I pulled the codes. I expected to see something about a wheel speed sensor. The weird thing is, the code I pulled was P0117 which corresponds with the coolant temp circuit. This makes sense because I am seeing the temp gauge bounce around (will appear cold [below "C"] then up to normal operating temp).
What I don't understand is why the traction control light turns back off when the temperature is reading correctly. It goes back and forth like this in a cycle - the temp goes to below "C", the traction control light turns on, the "Service RSC Now" message will appear and the alarm starts. The temp goes back to normal operating levels, the traction control light turns off. The "Service RSC Now" message will not come back on until the temp reads below C and the traction control light turns back on.
The ABS light is NOT on. When I am at a stop and the temp gauge is below C, the engine fan spins like crazy, probably because by default it has no idea what the temp actually is. I have not noticed any weird braking issues or limp mode or anything like that.
The following has been replaced within the last year:
Front wheel hubs
Thermostat and housing with temp sensor
PCM
I'm confused, what does the RSC have to do with the coolant temp sensor? The issue seems to be related based on the lights and gauges. May be just another bad PCM?
I pulled the codes. I expected to see something about a wheel speed sensor. The weird thing is, the code I pulled was P0117 which corresponds with the coolant temp circuit. This makes sense because I am seeing the temp gauge bounce around (will appear cold [below "C"] then up to normal operating temp).
What I don't understand is why the traction control light turns back off when the temperature is reading correctly. It goes back and forth like this in a cycle - the temp goes to below "C", the traction control light turns on, the "Service RSC Now" message will appear and the alarm starts. The temp goes back to normal operating levels, the traction control light turns off. The "Service RSC Now" message will not come back on until the temp reads below C and the traction control light turns back on.
The ABS light is NOT on. When I am at a stop and the temp gauge is below C, the engine fan spins like crazy, probably because by default it has no idea what the temp actually is. I have not noticed any weird braking issues or limp mode or anything like that.
The following has been replaced within the last year:
Front wheel hubs
Thermostat and housing with temp sensor
PCM
I'm confused, what does the RSC have to do with the coolant temp sensor? The issue seems to be related based on the lights and gauges. May be just another bad PCM?