Engine control system
ENGINE CONTROL SYSTEM : Component Parts Location
1. Mass air flow sensor
(with intake air temperature sensor)
2. Electric throttle control actuator
(with built in throttle position sensor
and throttle control motor)
3. EVAP canister purge volume control
solenoid valve
4. Cooling fan mot ...
U0073 Communication bus a off
DTC Logic
DTC
Trouble diagnosis name
DTC detecting condition
Possible causes
U0073
Control Module Communication
Bus "A" Off
When the ignition switch is ON,
TCM detects a bus-off error
continuously for 2 seconds or
more.
Harness or connector
(CA ...