The new sensor and wiring repair fixed the initial issues. It had set codes p0113 (IAT), p0113 pending, and p0135 (O2 sensor heater). My 2000 Malibu had a bad O2 sensor and a wiring issue with the IAT sensor as well. The PCM will command the check engine light to illuminate and store a DTC if the fault occurs during 2 drive cycles. Perhaps the cat monitor has to set before the air injection test can run. Discussion Starter 1 (Edited) Evap and secondary air monitors incomplete. 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. 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. Even if the system did not monitor the air pump flow, there would still be the problem of excessive carbon build-up in the cylinder head. As with most other monitored OBD II systems all AIR electrical components are checked for electrical and rationality faults during continuous monitoring. Keep it idling at 1200 rpm until it reaches 83C, let it drop to idle, pump will come on for about 10 seconds and OBDII monitor will be set to ready. Open the hood, with engine cold start the car and listen to air pump. If the monitor does not successfully execute on cold start up, the PCM can force the monitor to run during normal idling conditions. SAI test happens during every trip with engine started cold below 45C. The monitor usually runs on the start up of a cold engine, conditions permitting. 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. This extra air helps heat the catalytic converter quickly when the engine is first started. In petrol engine vehicles, secondary air injection is a proven method of reducing harmful substance emissions during cold starting. 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. The flipside is they have done everything correctly and you just haven't done a proper drive cycle yet.OBD II Readiness Monitors OBD Drive Cycles Secondary AIR System Monitor Hell, print it out and take it with you so they know you know what is going on.
P1413 MINI Secondary Air Injection System Monitor Circuit Low Voltage. Drive the vehicle at 45-55 mph for a continuous 7 minute period, avoid stopping. This executes the O2S Heater, Misfire, Secondary AIR, Fuel Trim, and Purge system monitors. Switch the ignition on and start the vehicle. Say it still wont run the Secondary air monitor and I've done the drive cycle. P1413 Mercury Secondary Air Injection System Monitor Circuit Low Voltage. This drive cycle should be valid for Volkswagen engine codes BGP and BGQ. This means the air injection part of the drive cycle is tested when the engine is first started.
In this case it sounds like they looked for and found an issue but did you pay for them to do that is the issue.īasically take it back. If they find another problem it may or may not fall on them since the system was indeed faulted by those things replaced and whether or not you paid for a diagnosis or just told them to replace so/so part. Incomplete diagnosis does happen and it's not either party's fault at times.įor instance, if a car is brought in on a tow-truck for a hole in the radiator, there is no way for a tech to know that your thermostat is not functioning properly until the radiator is fixed first. If they can't get it to pass, they may have misdiagnosed /incompletely diagnosed the issue and need to continue to diagnose the issue if you in-fact paid for diagnosis. You may have to leave it for a bit but if it's really fixed, they should have it back to you quickly. Keep in mind the Readiness Monitor routine is just. The ECM monitors the secondary air injection system pressure by tracking voltage signal from the pressure sensor, which is integral to the solenoid (shutoff. If the car/engine/sensors/actuators are not in GOOD SHAPE, no amount or trying and expecting the Drive Cycle to he the Holy Grail to Readiness Monitors will help the situation. i figured its more of an exhaust system question than an engine question or anything else but i could be mistaken. So take it back and have them verify the fix they did by getting it to pass the Secondary air monitor. Drive Cycle testing ASSUMES, EXPECTS and REQUIRES the engine and all the sensors and actuators to be in GOOD SHAPE.
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