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P0103 2018 Chevrolet Silverado Code - Mass or Volume Air Flow Circuit High Input

Quick Answer

The P0103 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates a problem with the Mass or Volume Air Flow (MAF/VAF) circuit having a high input. Common causes include Faulty MAF sensor, Dirty or contaminated MAF sensor, Wiring issues such as frayed or damaged wires. 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 Chevrolet Silverado indicates Mass or Volume Air Flow Circuit High Input.
Common causes
Common causes include Faulty MAF sensor, Dirty or contaminated MAF sensor, Wiring issues such as frayed or damaged wires.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0103 2018 Chevrolet Silverado Description

The P0103 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates a problem with the Mass or Volume Air Flow (MAF/VAF) circuit having a high input. The MAF sensor measures the amount of air entering the engine to determine the correct air-fuel mixture for combustion. When the PCM (Powertrain Control Module) detects a high voltage input from the MAF sensor, it triggers the P0103 code. This could be due to a faulty MAF sensor, wiring issues, or problems with the PCM itself.

OBDII Code P0103 2018 Chevrolet Silverado - Mass or Volume Air Flow Circuit High Input
P0103 2018 Chevrolet Silverado Code - Mass or Volume Air Flow Circuit High Input

Common Causes of P0103 2018 Chevrolet Silverado

  1. Faulty MAF sensor
  2. Dirty or contaminated MAF sensor
  3. Wiring issues such as frayed or damaged wires
  4. Vacuum leaks in the intake system
  5. Faulty PCM

Symptoms of P0103 2018 Chevrolet Silverado

  1. Rough idling or stalling
  2. Decreased fuel efficiency
  3. Engine misfires
  4. Loss of power during acceleration
  5. Check Engine Light illuminated

How to Fix P0103 2018 Chevrolet Silverado

  1. Begin by checking the MAF sensor for any visible damage or contamination. Clean the sensor using MAF sensor cleaner if necessary.
  2. Inspect the wiring harness connected to the MAF sensor for any signs of damage. Repair or replace any damaged wires.
  3. Check for vacuum leaks in the intake system by performing a smoke test or using a can of carburetor cleaner to identify leaks.
  4. If the MAF sensor and wiring are in good condition, consider testing the PCM for proper functioning or have it reprogrammed by a professional.
  5. Clear the DTC and reset the PCM to see if the P0103 code returns. If it does not, monitor the vehicle for any recurring issues.

Cost to Fix P0103 2018 Chevrolet Silverado

The cost of repairing a P0103 code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. On average, the cost of replacing a MAF sensor ranges from $100 to $400, including parts and labor. If wiring repairs or PCM reprogramming are required, additional costs may apply. Diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It is recommended to consult with a trusted mechanic or service center to get an accurate estimate based on your location and vehicle specifics.

What does this mean?

Tech Notes for P0103 2018 Chevrolet Silverado

Before replacing the Mass Air Flow (MAF) Sensor, try replacing the air filter and cleaning the Mass Air Flow Sensor with low compress air or Mass Air Flow Sensor Cleaner. Reset code and drive vehicle. If the code comes back, you must replace the Mass Air Flow Sensor to fix the problem.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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