![]() The PCM will command the check engine light to illuminate and store a DTC if the fault occurs during 2 drive cycles. This means that the ECM didnt receive a signal from the oxygen sensor, which monitors the oxygen content in the exhaust system. vehicleCHEV Silverado (0595398) 1 14:22:46Test Detail for 2001 CHEV Silverado (0595398) 11-JA08 14:22: 13:18:58 Readiness Monitor Status Misfire Monitor Ready Fuel System Monitor Ready. If an incorrect oxygen sensor signal is detected the PCM will set a pending code. The PCM will successfully complete the secondary AIR system monitor if the proper voltage signal is detected from the upstream oxygen sensor. Once the computer reset it was serviced and did not drive can you give me advice. Chevy Silverado 2001, Driver and Passenger Side Power Towing Mirror Set by Trail Ridge®. In order for the PCM to enable the secondary AIR system monitor the check engine light has to be commanded off, continuous monitors and the oxygen sensor monitor must have been successfully completed. Did not pass smog OBD faield secondary air system on my 2001 1500 truck chevy they said computer has not rest how many miles do i need to drive before it resets they said it would pass. As with most other monitored OBD II systems all AIR electrical components are checked for electrical and rationality faults during continuous monitoring. If the monitor does not successfully execute on cold start up, the PCM can force the monitor to run during normal idling conditions. The monitor usually runs on the start up of a cold engine, conditions permitting. So, Im a newbie here.And I will start right off by asking for input with an issue Im having with my 2001 Silverado 5.3L. The PCM uses the signal from the upstream oxygen sensor to detect the presence of extra air in the exhaust manifold supplied by the AIR system. (PCM) for low air flow (or voltage) input through the. In order to be classified as a cold start the engine coolant temperature must be below 50☌ (122☏) and within 6☌ (11☏) of the ambient air temperature at startup. This extra air helps heat the catalytic converter quickly when the engine is first started. Description: The mass air flow (MAF) sensor circuit is monitored by the powertrain control module. First you can have it reset with a scan tool. ![]() When vehicles are equipped, the secondary AIR system monitor allows the PCM to ensure that extra air is being delivered to the exhaust system during cold engine operating conditions. OBD II Readiness Monitors OBD Drive Cycles Secondary AIR System Monitor
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