P0102 2017 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 2017 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 2017 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 2017 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 2017 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 2017 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 2017 GMC Sierra Code
What does the OBDII code P0102 mean on a 2017 GMC Sierra?
P0102 indicates that the Mass Air Flow (MAF) sensor is reporting a low voltage or air flow reading, suggesting an issue with the MAF sensor circuit or air intake system.
What are the common symptoms of code P0102 in a 2017 GMC Sierra?
Symptoms may include poor engine performance, reduced fuel efficiency, rough idling, stalling, and the Check Engine Light (CEL) being illuminated.
What causes the P0102 code to appear on a 2017 GMC Sierra?
Common causes include a dirty or faulty MAF sensor, air intake leaks, wiring or connector issues in the MAF circuit, or a clogged air filter.
Can a dirty air filter cause the P0102 code?
Yes, a clogged or dirty air filter can restrict airflow to the MAF sensor, potentially triggering the P0102 code.
How do I diagnose the P0102 code on my 2017 GMC Sierra?
Start by inspecting the MAF sensor and air intake for dirt or damage, check the air filter, and examine the wiring and connectors for any issues. Use a scanner to read live data from the MAF sensor.
Can I drive my 2017 GMC Sierra with the P0102 code?
Driving with this code is possible but not recommended, as it may lead to poor performance, reduced fuel economy, and potential damage to the engine over time.
How do I fix the P0102 code on a 2017 GMC Sierra?
Common fixes include cleaning or replacing the MAF sensor, replacing the air filter, repairing damaged wiring, or sealing air intake leaks.
Is the MAF sensor always the problem when the P0102 code appears?
No, while the MAF sensor is a common cause, other issues like intake leaks, wiring problems, or ECU malfunctions can also trigger the P0102 code.
What tools are needed to repair the P0102 code on a 2017 GMC Sierra?
You may need a scan tool, a multimeter, a screwdriver, MAF sensor cleaner, and basic hand tools for inspection and repairs.
How much does it typically cost to fix the P0102 code on a 2017 GMC Sierra?
Costs vary depending on the issue. Cleaning the MAF sensor may cost under $20, while replacing the sensor can range from $100 to $300, plus labor if done by a mechanic.
Discuss the causes and fixes for P0102 2017 GMC Sierra OBDII Code
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