P0108 Pontiac 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 Pontiac 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 Pontiac 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 Pontiac?
- 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 Pontiac?
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 Pontiac 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 Pontiac Code
1. What are the common symptoms of OBDII code P0108 in a Pontiac?
- Common symptoms include poor engine performance, reduced fuel efficiency, rough idling, stalling, and illuminated Check Engine Light.
2. What does the OBDII code P0108 indicating "Manifold Absolute Pressure/Barometric Pressure Circuit High Input" mean for a Pontiac?
- It means that the Engine Control Module (ECM) has detected a high input voltage from the Manifold Absolute Pressure (MAP) sensor or Barometric Pressure (BARO) sensor.
3. What are the possible causes of OBDII code P0108 in a Pontiac?
- The possible causes include a faulty MAP sensor, BARO sensor, damaged wiring or connectors, vacuum leaks, or a problem with the ECM.
4. How can I diagnose the OBDII code P0108 in my Pontiac?
- You can diagnose the code by checking the MAP and BARO sensor readings using an OBDII scanner, inspecting the sensor wiring and connectors for damage, and testing for vacuum leaks.
5. Can driving with an unresolved OBDII code P0108 cause further damage to my Pontiac?
- Continuing to drive with this code may result in poor engine performance, reduced fuel efficiency, and potential damage to other engine components over time.
6. How can I repair OBDII code P0108 in my Pontiac?
- Repair options include replacing the faulty MAP or BARO sensor, repairing damaged wiring or connectors, fixing any vacuum leaks, or reprogramming the ECM if necessary.
7. Is it safe to reset the Check Engine Light after repairing OBDII code P0108 in my Pontiac?
- Yes, it is safe to reset the Check Engine Light using an OBDII scanner after making the necessary repairs. The light should stay off if the issue has been resolved.
8. Will OBDII code P0108 prevent my Pontiac from passing an emissions test?
- Yes, having an unresolved P0108 code may cause your Pontiac to fail an emissions test due to increased emissions and poor engine performance.
9. How much does it typically cost to repair OBDII code P0108 in a Pontiac?
- The cost of repair can vary depending on the specific cause of the code, but it may range from $100 to $300 for parts and labor.
10. Can I fix OBDII code P0108 in my Pontiac myself, or should I take it to a professional mechanic?
- While some DIY enthusiasts may be able to diagnose and repair this code, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair to ensure the issue is resolved correctly.
Discuss the causes and fixes for P0108 Pontiac OBDII Code
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I replaced the map sensor on my 1998 Pontiac Grand Am. I still have problems with it. It doesn't run well without a foot on the accelerator. It stalls when pressing gas sometimes.
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