P0108 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado?
- 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 2015 Chevrolet Silverado?
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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado Code
1. What does the P0108 code mean on a 2015 Chevrolet Silverado?
The P0108 code indicates that the Manifold Absolute Pressure (MAP) sensor is detecting a voltage signal that is too high, which may indicate an issue with the MAP sensor or related components.
2. What are the common symptoms of a P0108 code in a 2015 Chevrolet Silverado?
Symptoms include poor engine performance, rough idling, reduced fuel efficiency, black smoke from the exhaust, and possible stalling or difficulty starting.
3. What causes the P0108 code on a 2015 Chevrolet Silverado?
Common causes include a faulty MAP sensor, a vacuum leak, damaged wiring or connectors, a failing PCM (Powertrain Control Module), or excessive carbon buildup in the intake manifold.
4. Can a dirty air filter trigger a P0108 code?
While unlikely, a severely clogged air filter could impact airflow and indirectly contribute to issues that might trigger this code.
5. How do you diagnose a P0108 code on a 2015 Chevrolet Silverado?
Diagnosis typically involves using an OBDII scanner to confirm the code, inspecting the MAP sensor and its wiring for damage, checking for vacuum leaks, and testing the sensor’s voltage output with a multimeter.
6. Is it safe to drive a 2015 Chevrolet Silverado with a P0108 code?
Driving with a P0108 code is not recommended as it can lead to poor engine performance, reduced fuel efficiency, and potential engine damage if left unresolved.
7. How do you fix a P0108 code on a 2015 Chevrolet Silverado?
Repairs may include replacing the MAP sensor, repairing or replacing damaged wiring, cleaning the intake manifold, or addressing any vacuum leaks.
8. What is the MAP sensor’s role in the 2015 Chevrolet Silverado?
The MAP sensor measures the pressure inside the intake manifold and sends this data to the PCM to help determine the proper air-fuel mixture and ignition timing.
9. Can a faulty PCM cause a P0108 code?
Yes, a malfunctioning PCM can occasionally cause a P0108 code, but this is less common and should only be considered after ruling out other potential causes.
10. How much does it cost to fix a P0108 code on a 2015 Chevrolet Silverado?
Repair costs can vary but typically range from $100 to $300, depending on whether the MAP sensor needs replacement or if additional repairs like fixing wiring or vacuum leaks are required.
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