How Trouble Codes Are Set

The Diagnostic Trouble Codes (DTCs) available for the remaining components on the 2.0L engine are listed as follows. In many cases, these codes are carried over from the OBD I diagnostics. Each listing includes a brief explanation of the J 2012 code and its number, and is preceded by the flash code produced by the Malfunction Indicator Lamp (MIL) on the instrument panel.

Several tests are made on comprehensive components. Components are tested for electrical opens and shorts. Inputs are tested for rationality: Does the signal make sense when compared to other signals? Outputs are tested for functionality: Does the change in inputs make sense after an output actuation?

NOTE: Unlike previous Chrysler products, the Neon and Talon's DTCs cannot self erase after 50 warm-up cycles. Also, the MIL will not extinguish after the key has been cycled. If the MIL illuminates, a DTC is stored. Once the MIL is on, the PCM requires that the EGR monitor, and 02 monitor be run or aborted, and the secondary air injection monitor must be run before the PCM can diagnose a previously malfunctioning component. The PCM also requires that this occur three times before the MIL is extinguished. Once the MIL is extinguished, the DTC can be self-erased after 40 warm-up cycles.