Unleash Your Diagnostic Skills Uncovering OBDII Failures in CAN Safety Tests

Understanding OBDII Failures. 1. Reasons Your Vehicle May Have Failed The OBDII Test. Catalytic Converter failure,. Faulty gas cap,. Fuel ... Problems with spark plugs or ignition coils can lead to misfires and poor engine performance. Timing issues affecting ignition timing may also ... " The Vehicle Inspection Report from the test equipment will identify monitors that are not ready. ... can detect any emissions failures. Your vehicle's ... If the ECU commands the check engine light to illuminate, there will always be at least one P0 code stored. However, sometimes there are “pending codes”, which ... Devices like an OBD-II code reader can read diagnostic trouble codes (DTC) that the system stores when something goes wrong. Typically, at least one code is ... Vehicles that fail due to non-communication fail because the vehicle's onboard computer did not send a signal to the emissions testing equipment. Occasionally, ... If there is excessive pollution, it means the emissions control system is not functioning properly, the vehicle needs repair and it will fail DEQ's test. This ... First, try to verify that your scan tool or tuner is not the problem ...... and that it will function on another 6.0L system. Follow steps below ... This will cause the vehicle to fail the emission test right then and there. It's best to repair the vehicle so the code doesn't return. Tester. The obd2 port wears out, easiest is to buy a pig tail replacement and remove the old one and wire up the new one.