Basically the DME monitors the efficiency of this by the readings on the Pre/Post cat oxygen sensors. The one time i actually had all of the monitors set except SAI was BC day and of course aircare is closed that day, and the next morning P0411 came up! Up here you cannot have any past/present codes stored on the ECU during the testing time! If you have not failed aircare prior, and you have 2 not ready, you will be forced to run the IM240 driving test, but the previous owner, failed aircare, so i could only have 1 Not ready.Īnyways, basically as you know the Secondary Air flow injection system, now known as SAI injects air into the exhaust stream to create an excessively lean situation to heat up the catalyst faster. I guess my SAI system was so bad, it tripped it every cold start, i knew i needed to fix this so i could insure it for a year instead of putting day permits on it. I had it set, but everytime it set, i tripped the P0411 Code. I was unable to pass aircare/smog because in my region, we are only able to have 1 Not ready status, and for the life of me, i could not get EVAP to set. I loved the reflash and i would still recommend it to anyone who has the AA/P0411 Codes and doesnt want their check engine light to be on! I had the Powerchips Reflash with the CBU fix, but for some reason something disagreed with my vehicle and it didnt work as id hoped. Temp fix from M5 board to set the Secondary Air Flow maybe it would work on the M73 also?Īfter having issues with secondary air flow codes, and not wanting to spend 8,000$ to fix it, i started venturing into the area of trying to come up with a temporary fix so that i could pass aircare(smog). One post said that if one will not set then it wil not proceed to the next? Maybe the EVAP is not setting and not going onto the Secondary Air test? Here are charts of the drive cycles and how to set them. If it detects no airflow when the EVAP canister purge valve is opened, or it detects a leak that equals or exceeds the amount of air that would pass through a hole 0.040 inches in diameter (0.020 inches for 2000 and up model year vehicles), it logs a trouble code in the P0440 to P0457 range. The EVAP monitor checks for vapor leaks by applying vacuum or pressure to the fuel tank, vapor lines and charcoal canister. The presence of any EVAP-related fault codes will prevent the EVAP monitor from running. All of the components in the EVAP control system must also be functioning normally. On some vehicles, the EVAP monitor runs when the vehicle has been cruising on the highway at light throttle at a speed of 45 to 65 mph for at least 10 minutes or more. The vehicle must also have sit overnight or for 8 hours or more without being driven. The ambient outside temperature must not be too hot (above 95 degrees) to too cold (below 30 degrees) because this affects fuel volatility and the amount of vapor inside the tank. Generally speaking, the fuel tank must be 1/4 to 3/4 full because a near empty tank or a full tank can affect the accuracy of the EVAP self-test. The requirements for running the EVAP monitor vary depending on the year, make and model of your vehicle. If these conditions have not been met since the last time the monitor ran, or since the last time the battery was disconnected, or since the last time fault codes were cleared from the PCM memory, the EVAP monitor will NOT be ready. As a rule, the EVAP monitor only runs when certain conditions have been met. The EVAP (Evaporative Emission Control System) monitor checks for fuel vapor leaks (including a loose or missing gas cap).
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