Yellow engine light truck runs fine .
an answer from just answers reports this
ecu 1 fault means the engine ECM has an internal fault and needs to be replaced
most of the time with this code it is not the ECM itself but usually a wiring problem going to the ECm
there should be 2 fuses for the ECM either next to the ecm in plastic covers by a starter or in a plastic box
check all wiring going to and from the engine and battery grounds
especially the grounds
check for wires rubbed through and loose terminals
take it to a service dealer for a proper diagnosis as it costs money wasting time trying to find the fault yourself as a truck standing still is not earning it's keep
SOURCE: I have a dd15 freghterliner 2011 with a fault code EEC 61 What do it mean
what engine has it go
if it is a GM detroit 60 series it is no 6 injector circuit board problem
heavy vehicle fault codes are specific to engine or transmission installed in what ever vehicle
take it to a service center for the engine make and have it properly diagnosed
The Check engine soon (yellow light) comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system you will seldom feel the car engine run any differently, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.
The Check Engine Light (yellow light) comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system you will seldom feel the car engine run any different, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.
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