P0108 Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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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Information for Specific Chevrolet Models
- P0108 2014 Chevrolet Silverado — Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- P0108 2015 Chevrolet Silverado — Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- P0108 2016 Chevrolet Silverado — Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- P0108 2017 Chevrolet Silverado — Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- P0108 2018 Chevrolet Silverado — Manifold Absolute Pressure/Barometric Pressure Circuit High Input
Frequently Asked Questions about P0108 Chevrolet Code
1. What does the OBDII code P0108 mean on a Chevrolet?
P0108 indicates that the Manifold Absolute Pressure (MAP) sensor is reporting a voltage signal higher than expected, often suggesting an issue with the sensor or related components.
2. What are the common symptoms of the P0108 code on a Chevrolet?
Symptoms may include poor engine performance, rough idling, hesitation during acceleration, decreased fuel efficiency, and an illuminated Check Engine Light.
3. What causes the P0108 code to appear on a Chevrolet?
Common causes include a faulty MAP sensor, damaged wiring or connectors, a vacuum leak, or a malfunctioning powertrain control module (PCM).
4. Can a dirty air filter trigger the P0108 code in a Chevrolet?
While rare, an extremely clogged air filter can disrupt airflow and potentially contribute to MAP sensor issues, although it’s not a primary cause.
5. How can I diagnose the P0108 code on my Chevrolet?
Start by inspecting the MAP sensor and its wiring for damage, check for vacuum leaks, and use a multimeter to test the sensor’s voltage output against manufacturer specifications.
6. Is it safe to drive with the P0108 code on a Chevrolet?
It’s not recommended to drive for an extended period with this code, as it can lead to poor engine performance and potential damage to other components.
7. How do I fix the P0108 code on a Chevrolet?
Repairs may include replacing the MAP sensor, repairing damaged wiring or connectors, fixing vacuum leaks, or reprogramming/updating the PCM if necessary.
8. Can a faulty throttle position sensor cause the P0108 code on a Chevrolet?
While not a direct cause, issues with the throttle position sensor can sometimes affect MAP sensor readings, leading to this code.
9. Does the P0108 code affect fuel economy on a Chevrolet?
Yes, a malfunctioning MAP sensor can cause incorrect air-fuel mixture calculations, leading to decreased fuel efficiency.
10. How much does it cost to fix the P0108 code on a Chevrolet?
Repair costs can vary widely but typically range from $100 to $300 for parts and labor, depending on whether the issue is with the MAP sensor, wiring, or another component.
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