However, the corresponding trouble code will be retained in ECU memory. Intermittent failures may cause CHECK ENGINE light to flicker or illuminate and go out after the intermittent fault goes away. Honda Accord LX 1992 - INTERMITTENT FAILURES In this condition, commonly known as limp-in mode, the vehicle runs but driveability will not be optimum. If a sensor fails, control unit will use a substitute value in its calculations to continue engine operation. If light comes on and remains on (light may flash) during vehicle operation, cause of malfunction must be determined using TROUBLE CODE CHARTS. Hard failures cause CHECK ENGINE light to illuminate and remain on until problem is repaired. Honda Accord LX 1992 - SELF-DIAGNOSTIC SYSTEM HARD FAILURES If no trouble codes or only pass codes are present after entering self-diagnostics, proceed to TESTS W/O CODES article in the ENGINE PERFORMANCE Section for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.). If no faults were found while performing BASIC TESTING article in the ENGINE PERFORMANCE Section, proceed with self-diagnostics. Therefore, you should always check for manufacturer specific codes, with an appropriate manual.Honda Accord LX 1992 - 1992 ENGINE PERFORMANCE Self-Diagnostics So, we do try and make them as accurate as we can, but we all make mistakes. Furthermore, these early systems were made of proprietary connectors, protocols, and hardware interfaces.Īs a result, we cannot guarantee the accuracy of all trouble codes. So, OBD1 gave cars a system that, detected problems and then reported them, as trouble codes.