Patent ID: 7480559

Claim:
A method to operate an electronic controlled internal combustion engine, said engine equipped with an electronic control unit (ECU) comprised of a Motor Control Module (MCM) and a Computer Powertrain Controller (CPC) each of which have volatile and nonvolatile memory; said engine further equipped with an exhaust system including an emissions system and sensors in communication with the MCM to transmit data signals indicative of hardware failures or impending hardware failures and exhaust emissions levels; said method to force a maximum available engine torque and speed whenever an emission related fault is detected; said method comprising: a) determining whether a detected error an emission related error; b) determining whether actual emission at actual engine speed and engine torque is outside a range of calculated emissions at actual engine speed and engine torque stored in memory; c) de-rating at least said engine torque a predetermined amount as a fault reaction at actual engine speed.