P0108 2017 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 2017 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 2017 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 2017 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 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0108 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.
Need more information about the P0108 2017 GMC Sierra code?
Need more information on how to fix the P0108 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0108 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0108 2017 GMC Sierra Code
What does the OBDII code P0108 mean on a 2017 GMC Sierra?
The P0108 code indicates that the Manifold Absolute Pressure (MAP) sensor is detecting a voltage signal that is higher than the expected range, suggesting an issue with the sensor or its circuit.
What are the common symptoms of the P0108 code on a 2017 GMC Sierra?
Symptoms include poor engine performance, rough idling, reduced fuel efficiency, stalling, difficulty starting, and the illumination of the check engine light.
What causes the P0108 code to appear on a 2017 GMC Sierra?
Common causes include a faulty MAP sensor, damaged wiring or connectors in the MAP sensor circuit, a vacuum leak, a clogged air filter, or issues with the engine computer (ECM).
Can I drive my 2017 GMC Sierra with the P0108 code?
While it might still be drivable, driving with this code can lead to poor performance and potential engine damage. It’s best to address the issue promptly.
How do I diagnose the P0108 code on a 2017 GMC Sierra?
Start by inspecting the MAP sensor and its wiring for damage or loose connections. Use a scan tool to check live data from the MAP sensor and compare it to expected values under various engine conditions.
How do I fix the P0108 code on my 2017 GMC Sierra?
Repairs may include replacing the MAP sensor, repairing damaged wiring or connectors, fixing vacuum leaks, or cleaning or replacing the air filter. In rare cases, the ECM may require reprogramming.
How much does it cost to fix the P0108 code on a 2017 GMC Sierra?
The cost varies depending on the root cause. Replacing a MAP sensor typically costs $100-$300, including parts and labor. Repairs to wiring or vacuum lines may vary.
Can a dirty air filter cause the P0108 code on a 2017 GMC Sierra?
Yes, a clogged or dirty air filter can restrict airflow, causing inaccurate MAP sensor readings and triggering the P0108 code.
How can I prevent the P0108 code from recurring on my 2017 GMC Sierra?
Regular maintenance, such as replacing the air filter and inspecting the MAP sensor and its wiring, can help prevent this code from recurring.
Does the P0108 code affect fuel economy on a 2017 GMC Sierra?
Yes, a faulty MAP sensor or related issue can lead to incorrect air-fuel mixture readings, reducing fuel efficiency.
Discuss the causes and fixes for P0108 2017 GMC Sierra OBDII Code
Code P0108 2017 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
