U0100
High severityLost Communication With ECM/PCM 'A'
Quick answer
U0100 (Lost Communication With ECM/PCM 'A') means: A module lost communication with the engine computer over the car's data network. Diagnose promptly; can stop the car from running. Typical Malaysia repair cost: RM300–RM1,200 (approximate).
Symptoms
- •Multiple warning lights
- •No-start or stalling
- •Limp mode
Likely causes
- •Wiring/connector fault on the CAN bus
- •Failed module
- •Power/ground problem
Can I drive?
Diagnose promptly; can stop the car from running.
Estimated repair cost (Malaysia)
RM300–RM1,200 (approximate)
This is general information, not a diagnosis. AutoMalaya OBD helps explain your car’s actual scan data; a qualified mechanic may still need to inspect the vehicle.