P0103 2018 GMC Sierra Code - Mass or Volume Air Flow Circuit High 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
- P0103 2018 GMC Sierra indicates Mass or Volume Air Flow Circuit High 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 P0103 2018 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 greater than 14, 500 Hz (about 1233 g/s) for greater than 10 s.
What are the Possible Causes of the DTC P0103 2018 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 P0103 2018 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 P0103 2018 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 P0103 2018 GMC Sierra Code
1. What does the OBDII code P0103 for a 2018 GMC Sierra mean?
The code P0103 indicates a high input in the mass or volume air flow circuit of the vehicle.
2. What are the common symptoms of OBDII code P0103 in a 2018 GMC Sierra?
Common symptoms of code P0103 include poor acceleration, engine stalling, rough idling, decreased fuel efficiency, and a check engine light illuminated on the dashboard.
3. What are the possible causes of OBDII code P0103 in a 2018 GMC Sierra?
Possible causes of code P0103 include a dirty or faulty mass air flow sensor, a vacuum leak, damaged air intake hose, issues with the air filter, or a problem with the wiring or connector related to the sensor.
4. How can I diagnose the OBDII code P0103 in my 2018 GMC Sierra?
To diagnose code P0103, you can start by visually inspecting the mass air flow sensor and its connections, checking for any visible damage or debris. You may also use an OBDII scanner to monitor the sensor's readings and verify if they are within the normal range.
5. What are some repair tips for OBDII code P0103 in a 2018 GMC Sierra?
Repair tips for code P0103 include cleaning or replacing the mass air flow sensor, checking and fixing any vacuum leaks, inspecting the air intake system for damage, and ensuring that the sensor's wiring and connector are in good condition.
6. Can I drive my 2018 GMC Sierra with the OBDII code P0103?
It is not recommended to drive your vehicle with an unresolved P0103 code, as it can lead to further damage and potential safety hazards. It's best to address the underlying issue promptly.
7. How much does it typically cost to repair OBDII code P0103 in a 2018 GMC Sierra?
The cost of repairing code P0103 can vary depending on the exact cause of the issue and the labor rates in your area. Generally, the repair cost may range from $100 to $300, but it's advisable to obtain a few quotes from mechanics for an accurate estimate.
8. Can a DIY enthusiast fix OBDII code P0103 in a 2018 GMC Sierra?
Depending on your level of experience and access to tools, DIY enthusiasts may be able to address code P0103 by cleaning or replacing the mass air flow sensor and checking for common issues like vacuum leaks. However, if you are unsure, it's best to seek professional help.
9. Will resetting the OBDII code P0103 in my 2018 GMC Sierra make it go away permanently?
Simply resetting the code without addressing the underlying issue will not make it go away permanently. The problem causing code P0103 needs to be diagnosed and fixed to prevent the code from reappearing.
10. How urgent is it to repair OBDII code P0103 in a 2018 GMC Sierra?
While your vehicle may still be operational with code P0103, it is important to address the issue in a timely manner to prevent further damage and ensure optimal performance. Ignoring the code can lead to more severe problems down the road.
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