One of the most critical parts is the power steering control unit, or SCU, which acts as another computer onboard the car that communicates with the
ECM during vehicle operation.
The engine control module (ECM) tests the intake manifold runner position on startup to test its operation and monitors the
position during vehicle operation and will set a fault code P2018 if the signal return is erratic or intermittent from the sensor.
The lock - up clutch ratio has been raised from 64 % from the current five - speed automatic to 88 %
during vehicle operation.
During vehicle operation, this could obstruct the view of the driver and increase the risk of a crash.