If no fault codes were stored, then what ever caused it to die, the ECM (engine computer) was not able to detect the fault. That means whatever
failed, the ECM does not monitor.
If for instance the ECM loses power, just like when you turn the key off, then the ECM does not store a code.
It could therefor be an Ignition Switch issue or a Power Supply Relay (for the ECM) issue. However, most vehicle these days, monitor power supply
to the Control Units and will set a "Battery B+ power too low" code.
Electrical gremlins can be a pain to fix, especially when they don't happen often enough. The fault needs to occur in order to find the cause.
Saturday, November 3rd, 2012 AT 5:49 PM