If code P0102 persists, use your scan tool to view pertinent live streaming data (regular code readers typically don’t have this feature).Ĭompare the MAF sensor’s data with that which is specified by your vehicle’s manufacturer. If the MAF sensor contamination is evident, the unit can be carefully cleaned with an approved cleaning solution such as CRC’s Mass Airflow Sensor Cleaner. The sensor body should be free of contaminants and other sources of fouling. ![]() Remove all necessary intake ducting to visually inspect the mass air flow sensor. If your air filter is dirty, contaminated with foreign debris, or otherwise compromised, replace it with an OEM equivalent filter. Open your vehicle’s air filter housing to inspect the element within. The propane from this torch can be waved across various vacuum hoses and intake system components, while listening for an audible change in idle. Cracked plastic boots and loose clamps can both compromise the intake system’s integrity.Īdditionally, vacuum leaks can be identified with the use of a smoke machine, or alternatively, with an unlit propane torch while the engine is running. #3 – Check For Vacuum and Intake LeaksĬarefully check your engine’s intake tract for any obvious leaks. Also, verify that your harness’ connector is securely coupled to the mass air flow sensor and that all wires are adequately anchored within. Carefully check for any frayed, pinched, or broken wires. Thoroughly inspect the wiring pigtail that pertains to your vehicle’s mass air flow sensor. If additional codes are present, it will be necessary to determine which code takes precedence. ![]() Prior to beginning the diagnostic process, check for the presence of additional codes with the use of a handheld OBD2 scanner. The following steps will assist you in diagnosing and repairing the root cause of your vehicle’s P0102 trouble code. It is always best to address such issues, before being left stranded as symptoms worsen. This condition has been known to cause engine stalling, as well as hard starting, which in turn leads to less than reliable vehicle performance. When your vehicle is experiencing any MAF sensor related issue, fuel consumption can be adversely affected, leading to excess expenditure at the pump.Īdditionally, some motorists might experience various drivability issues, when their vehicle actively exhibits a P0102 trouble code. Damaged Mass Air Flow Sensor Circuit Wiring or ConnectorsĪlthough code P0102 is not indicative of severe issues, prompt repair of any underlying condition is advised.The following are the most common symptoms associated with code P0102.Īn active P0102 code can come as a result of several different underlying issues. Although these additional symptoms are not present in 100% of cases, they are prevalent enough to warrant a motorist’s attention. In many cases, additional symptoms will present themselves with the presence of a P0102 diagnostic trouble code. Related: Code P0100, Code P0101, Code P0103 Symptoms of Code P0102 When a vehicle sets a P0102 trouble code, its PCM has determined that incoming data from the mass air flow sensor is invalid, and below the unit’s typical voltage threshold. Without rational input from the engine’s mass air flow sensor, the PCM cannot accurately meter fuel delivery, in the most optimal manner possible. This data is relayed to a vehicle’s PCM in real-time, which uses this data to calculate the proper amount of fuel to deliver, in order to optimize combustion. A mass air flow sensor detects the volume of air that passes through an engine’s intake tract, at any given time. To better understand the significance of code P0102, one must first understand what a mass airflow (MAF) sensor is, and how it operates. ![]() As a result, the PCM has determined this data to be irrational. This means that a vehicle’s PCM (Powertrain Control Module) has determined that the incoming signal from the engine’s mass air flow sensor is below the lower threshold of its operating range. Mass or Volume Air Flow Circuit Low Input
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