P0102 2016 GMC Sierra Code - Mass or Volume Air Flow Circuit Low Input
Quick Answer
The Mass Air Flow (MAF) sensor is integrated with the multifunction intake air sensor. Common causes include Dirty Air Filter, Dirty Mass Air Flow (MAF) Sensor, Intake air leaks. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0102 2016 GMC Sierra indicates Mass or Volume Air Flow Circuit Low Input.
- Common causes
- Common causes include Dirty Air Filter, Dirty Mass Air Flow (MAF) Sensor, Intake air leaks.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0102 2016 GMC Sierra Description
The ECM applies 5 V to the MAF sensor on the MAF sensor signal circuit. The sensor uses voltage to produce a variable frequency signal based on the inlet air flow through the sensor bore. The signal varies with engine load and is displayed by the scan tool as Hertz (Hz) and grams per second (g/s). Ignition voltage and ground circuits are also supplied to the multifunction intake air sensor internal circuits for the Intake Air Temperature (IAT) sensor 2, Humidity sensor, and MAF sensor.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the MAF Sensor Signal is less than 850 Hz (about 1.43 g/s) for greater than 10 s.
What are the Possible Causes of the DTC P0102 2016 GMC Sierra?
- Dirty Air Filter
- Dirty Mass Air Flow (MAF) Sensor
- Intake air leaks
- Faulty Mass Air Flow Sensor
- Mass Air Flow Sensor harness is open or shorted
- Mass Air Flow Sensor circuit poor electrical connection
How to Fix the DTC P0102 2016 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0102 2016 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0102 2016 GMC Sierra Code
What does the P0102 code mean for a 2016 GMC Sierra?
The P0102 code indicates that the Mass Air Flow (MAF) sensor is reporting a low voltage signal, suggesting an issue with the airflow measurement.
What are the common symptoms of the P0102 code?
Symptoms include reduced engine performance, rough idling, poor fuel economy, stalling, or difficulty starting the vehicle.
What causes the P0102 code in a 2016 GMC Sierra?
Common causes include a dirty or faulty MAF sensor, damaged wiring or connectors, intake air leaks, or a clogged air filter.
Can I drive my GMC Sierra with the P0102 code?
Driving with this code is possible but not recommended, as it can lead to further engine performance issues and reduced fuel efficiency.
How do I fix the P0102 code on a 2016 GMC Sierra?
Start by inspecting and cleaning the MAF sensor, checking for damaged wiring or connectors, replacing the air filter, and checking for intake leaks.
Can a dirty air filter trigger the P0102 code?
Yes, a clogged or dirty air filter can restrict airflow to the MAF sensor, causing the low input signal and triggering the code.
How do I clean the MAF sensor on my 2016 GMC Sierra?
Use a specialized MAF sensor cleaner spray to gently clean the sensor without damaging its delicate components. Do not use harsh chemicals or touch the sensor directly.
Can a vacuum leak cause the P0102 code?
Yes, a vacuum or intake leak can disrupt airflow and cause the MAF sensor to report an incorrect low signal.
Will resetting the check engine light fix the P0102 code?
Resetting the light may temporarily clear the code, but the underlying issue must be resolved to prevent the code from returning.
What tools are needed to diagnose the P0102 code?
You’ll need an OBDII scanner to read and clear codes, along with basic tools to inspect the MAF sensor, air intake system, and wiring.
Discuss the causes and fixes for P0102 2016 GMC Sierra OBDII Code
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