Today my c15 mxs giving me code 13 , fuel temp sensor not working, I installed a new temp sensor 3 month ago and the code came back today. Usually when when I keep my rpm steady if I throw it in neutral the engine light goes away .. usually happens once a day around my last run always.
Code 13 fuel temp sensor not working
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by AL617, Oct 1, 2022.
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If I remember correctly DTC 13 is for fuel temp sensor volts too high. This could be from a failed sensor but you need to verify the sensor ground and verify the sensor voltage. -
Voltage too high on two wire temp sensor is usually due to an open circuit.
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