Unveiling the Mystery OBDII Failures in CAN Safety Test Explained

Technically speaking, the PCM should store a DTC indicating some type of internal malfunction. But, in the real world, if your scan tool ... When spark plugs don't fire in the correct order, this can lead to problems for the emissions system, as an engine will misfire and create additional ... When diagnosing improper and unusual operation or CAN codes, especially in ABS/ESC, TPMS, NAV head units, ECM, TCM, HVAC, BSD and other systems ... A failed or aborted test will require the vehicle to cool down in order to meet the enable criteria to run another test. The I/M System Status ... The critical modules go into safe mode as a result. Usually a full ignition cycle will reset this. The best fix is to get a better scanner, but ... Vehicles will fail the OBDII test if too many monitors are unset at the time of testing. For 1996-2000 vehicles, three or more unset monitors ... Emissions should only check the ECU. I don't see why a busted ABS module would cause OBD-II scanner to fail. But who knows? Not me. Do you ... By connecting an OBDII scanner to the OBD port, fleet managers can identify and address problems before they lead to costly repairs or ... A common reason that cars fail emissions tests is a faulty oxygen sensor, which can cause issues with the check engine light. A simple (though somewhat pricey) ... In the United States, this capability is a requirement to comply with federal emissions standards to detect failures that may increase the vehicle tailpipe ...