duramax lb7 mass air flow sensor problems

Restricted intake air duct or a dirty air filter elementĭebris blocking the air sensing filaments of the MAF sensorĪn exhaust gas recirculation (EGR) valve that is stuck open.Ī skewed MAF sensor will also cause the predicted MAF value to disagree with the actual MAF sensor value. Leaks in the charge air cooler with a J 46091 Restrictions in the exhaust system-Refer to Restricted Exhaust. Restrictions in the MAF air induction system and the turbocharger system Verify the integrity of the air induction system by inspecting for the following conditions: This comparison will determine if the signal is stuck, or is too low or too high for a given operating condition. The ECM compares the actual MAF sensor voltage signal to a predicted MAF value. This output voltage will display on the scan tool as a voltage parameter and as a grams per second (g/s) parameter. The MAF sensor produces an output voltage based on the inlet air flow through the air induction system. The ECM uses the MAF sensor signal to control fuel delivery until a calibrated amount of engine air flow is attained. The engine control module (ECM) uses the MAF sensor voltage signal to provide the correct fuel delivery for a reduction in emissions. The mass air flow (MAF) sensor is an air flow meter that measures the amount of air entering the engine. This is a problem with many aftermarket air intakes, including Volant.įirst thing you need to do is get a good scanner and a good information system, like AlldataDIY.ĭo the diagnostics for the trouble code and you will see the BARO sensor also plays a part in making this trouble code active and is also part of the intake system.Īny time you modify the intake or exhaust systems on these newer cars/trucks, you are asking for headaches.

The problem is that the MAF sensor is not reading the air intake right.

Take your truck to the dealer they can reset your computer and that will take care of your problem.

Duramax lb7 mass air flow sensor problems