Hard Failures

Hard failures cause CHECK ENGINE light (MIL) to come on and remain on until problem is repaired. If MIL comes on and remains on (light may flash) during vehicle operation, cause of malfunction must be determined using diagnostic (code) charts. If a sensor fails, ECA will use a substitute value in its calculations to permit continued engine operation. In this condition (limp-in mode), vehicle will run but driveability will not be optimum.