![]() If voltage is not about 5 volts, go to step 9.Ħ. If voltage is about 5 volts, go to next step. Using DVOM, measure voltage between MAF sensor harness connector signal circuit and chassis ground. If no problems are found, go to next step.ĥ. Check for PCV valve faulty, missing or incorrectly installed. Check for vacuum leaks at intake manifold, throttle body or EGR valve flange and pipes. Check for MAF sensor inlet screen blockage. If DTC FAILED THIS IGN is not displayed, see DIAGNOSTIC AIDS.Ĥ. If scan tool indicates that this DTC FAILED THIS IGN, go to next step. Operate vehicle within conditions noted in FAILURE RECORDS. Using scan tool, read and record FAILURE RECORDS data. If frequency is not less than 1200 Hz, go to next step.ģ. If frequency is less than 1200 Hz, go to step 4. After performing OBD system check, go to next step.Ģ. Perform On-Board Diagnostic (OBD) system check. If MAF sensor signal frequency is less than 1200 Hertz (Hz), DTC will set.įor duplication of DTC, ensure engine is running, system voltage is greater than 8 volts, and TPġ. ![]() When certain test conditions are met, PCM will compare its calculated MAF value to actual value received from sensor. PCM calculates what MAF sensor reading should be received from sensor under certain conditions using engine speed (RPM), throttle position, and altitude parameters. MAF sensor readings during acceleration are much higher than those during deceleration or idle. PCM uses MAF sensor information for fuel delivery calculations. Mass Airflow (MAF) sensor measures amount of air entering engine during a given time. Before performing the procedures, check for vacumn leakages between the MAF and throttle body.ĭTC P0102: MAF SENSOR CIRCUIT - LOW FREQUENCY ![]()
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