Difficult Fault: Heat-Soak Crank Signal Dropout
A hot restart failed only after a short soak, and the crank signal returned before the vehicle reached the shop.
Category Difficult Faults
Intermittent, temperature-dependent, network, and multi-system cases that required a structured test plan.
Difficult Fault: Network Errors After Heavy Rain
Communication and warning-light complaints appeared after rain, then faded as a low connector dried.
Difficult Fault: Telematics Module Waking the Vehicle
Key-off current fell normally, then rose in repeatable bursts when a telematics module failed to remain asleep.
Difficult Fault: Reduced Power Only Under Towing Load
The vehicle entered reduced-power mode only on a long grade with trailer load, not during an unloaded road test.
Difficult Fault: Wheel-Speed Dropout Inside a Loaded Bearing
A wheel-speed signal remained clean on a lift but dropped out when cornering load shifted a worn magnetic encoder relative to the sensor.