P0108 2014 GMC Sierra Code - Manifold Absolute Pressure/Barometric Pressure Circuit High Input
Quick Answer
The Manifold Absolute Pressure (MAP) sensor measures the pressure inside the intake manifold. Common causes include Faulty Manifold Absolute Pressure (MAP) Sensor, Manifold Absolute Pressure Sensor harness is open or shorted, Manifold Absolute Pressure Sensor circuit poor electrical connection. 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
- P0108 2014 GMC Sierra indicates Manifold Absolute Pressure/Barometric Pressure Circuit High Input.
- Common causes
- Common causes include Faulty Manifold Absolute Pressure (MAP) Sensor, Manifold Absolute Pressure Sensor harness is open or shorted, Manifold Absolute Pressure Sensor circuit poor electrical connection.
- 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 P0108 2014 GMC Sierra Description
The MAP sensor wiring includes 3 circuits. The Engine Control Module (ECM) supplies a regulated 5 volts to the sensor on a 5 V reference circuit. The ECM supplies ground on a low reference circuit. The MAP sensor provides a signal voltage to the ECM, relative to the pressure changes, on the MAP sensor signal circuit. The ECM converts the signal voltage input to a pressure value.
Under normal operation the greatest pressure that can exist in the intake manifold is at ignition ON, engine OFF, which is equal to the BARO. The lowest manifold pressure occurs when the vehicle is idling or decelerating. The ECM monitors the MAP sensor signal for pressure outside of the normal range.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the MAP Sensor voltage is more than 4.50 V for greater than 13 ms.
What are the Possible Causes of the DTC P0108 2014 GMC Sierra?
- Faulty Manifold Absolute Pressure (MAP) Sensor
- Manifold Absolute Pressure Sensor harness is open or shorted
- Manifold Absolute Pressure Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0108 2014 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0108 2014 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 P0108 2014 GMC Sierra Code
What does the OBDII code P0108 mean for a 2014 GMC Sierra?
P0108 indicates that the Manifold Absolute Pressure (MAP) sensor is sending a signal voltage to the engine control module (ECM) that is higher than expected, suggesting an issue with the MAP sensor circuit.
What are the common symptoms of code P0108 on a 2014 GMC Sierra?
Symptoms may include poor engine performance, rough idle, difficulty starting, reduced fuel efficiency, black exhaust smoke, and the check engine light turning on.
What can cause the P0108 code to appear on a 2014 GMC Sierra?
Common causes include a faulty MAP sensor, damaged wiring or connectors in the MAP sensor circuit, a vacuum leak, or a malfunctioning ECM.
Can a dirty or clogged air filter trigger the P0108 code?
While less common, a dirty or clogged air filter can affect airflow and contribute to issues that may trigger the P0108 code.
How can you diagnose the P0108 code on a 2014 GMC Sierra?
Start by inspecting the MAP sensor and its wiring for damage, check for vacuum leaks, use a multimeter to test the MAP sensor voltage, and scan live data with an OBDII tool to monitor sensor readings.
Is it safe to drive a 2014 GMC Sierra with the P0108 code?
Driving with this code may be unsafe, as it can lead to engine performance issues and increased emissions. It’s best to address the problem promptly.
How do you fix the P0108 code on a 2014 GMC Sierra?
Repairs may involve cleaning or replacing the MAP sensor, repairing damaged wiring or connectors, fixing vacuum leaks, or replacing the ECM if necessary.
Can a failing throttle position sensor cause the P0108 code?
While not a direct cause, issues with the throttle position sensor can sometimes contribute to airflow or pressure problems that may indirectly trigger the P0108 code.
Does the P0108 code affect the fuel system in a 2014 GMC Sierra?
Yes, it can affect the air-fuel ratio, leading to inefficient combustion, poor fuel economy, and increased emissions.
How much does it cost to repair the P0108 code on a 2014 GMC Sierra?
Repair costs vary depending on the issue but typically range from $100 to $300 for parts and labor, depending on whether the MAP sensor or wiring needs replacement.
Discuss the causes and fixes for P0108 2014 GMC Sierra OBDII Code
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