P0108 BMW Code - Manifold Absolute Pressure/Barometric Pressure Sensor Circuit High
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 BMW indicates Manifold Absolute Pressure/Barometric Pressure Sensor Circuit High.
- 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 BMW 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 BMW?
- 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 BMW?
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 BMW 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 BMW Code
1. What are the common symptoms of OBDII code P0108 in a BMW?
- Common symptoms include rough idling, engine hesitation, decrease in fuel efficiency, and potential stalling of the vehicle.
2. What does the OBDII code P0108 in a BMW indicate?
- The code P0108 indicates a high voltage signal from the Manifold Absolute Pressure (MAP) sensor or Barometric Pressure (BARO) sensor circuit.
3. What are the possible causes of OBDII code P0108 in a BMW?
- The possible causes include a faulty MAP sensor, BARO sensor, damaged wiring or connectors in the sensor circuit, or a malfunction in the Engine Control Module (ECM).
4. How can I diagnose the issue related to OBDII code P0108 in my BMW?
- Diagnose the issue by checking the sensor's voltage readings, inspecting the wiring and connectors for any damage, and using a scan tool to monitor sensor data for abnormalities.
5. Can I drive my BMW with OBDII code P0108 without immediate repair?
- It is not recommended to drive your BMW with code P0108 unresolved, as it can lead to further engine damage and potential safety risks.
6. How can I repair OBDII code P0108 in my BMW?
- Repair involves replacing a faulty MAP sensor or BARO sensor, repairing damaged wiring or connectors, or resetting the ECM to clear the code.
7. Will resetting the ECM clear OBDII code P0108 permanently?
- Resetting the ECM may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear during vehicle operation.
8. How much does it typically cost to repair OBDII code P0108 in a BMW?
- The cost of repair can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor.
9. Are there any preventive measures to avoid OBDII code P0108 in a BMW?
- Regular maintenance, such as checking and replacing sensors as recommended by the manufacturer, can help prevent issues leading to code P0108.
10. Can a DIY enthusiast repair OBDII code P0108 in a BMW?
- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair code P0108, but professional assistance is recommended for complex issues.
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