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P0108 Fault-Error Code MAP-BP SENSOR CIRCUIT HIGH INPUT

Updated: Aug 26

What is P0108 Fault-Error Code?

 

The P0108 Fault-Error Code indicates that a high input signal has been detected at the vehicle's Manifold Absolute Pressure (MAP) sensor or Barometric Pressure (BP) sensor. These sensors measure the air pressure in the vehicle's intake manifold and transmit this information to the engine control unit (ECU). The ECU uses this information to calculate fuel injection and other engine performance-related factors.



P0108

 

What are the symptoms of P0108 Fault/Error Code?

 

Symptoms of the P0108 Trouble/Error code typically include the following:

 



Reduced Engine Performance: High input error in the MAP/BP sensor can make it difficult for the engine to calculate and adjust the correct fuel-air mixture. This may cause a decrease in engine performance. Your vehicle may have difficulty accelerating or a loss of power may occur.

 

Reduced Fuel Economy: Without accurate air pressure information, the engine's fuel injection efficiency can be affected. In this case, your vehicle's fuel economy may worsen and it may consume more fuel.

 



Engine Shudder or Surge: Improper fuel-air mixture can cause the engine to run erratically. This can be felt as motor shaking or fluctuation.

 

Faulty Check Engine Light: Code P0108 is usually associated with a faulty check engine light. This light comes on when there is a problem detected by the vehicle's engine control unit (ECU).

 



What could be the causes of P0108 Fault/Error Code?

 

There are various factors that can cause the P0108 Fault/Error code to appear. These may include:

 

MAP/BP Sensor Malfunction: Manifold Absolute Pressure (MAP) or Barometric Pressure (BP) sensor may be faulty. There may be a mechanical or electronic fault in the sensors, or the sensor may not be working properly.

 

Connection Problems: There may be problems with the cables or ports to which the sensor is connected. This could be in the form of corrosion, loose connections, or breaks in the cable.

 



Air Leak in Intake Manifold: There may be an air leak in the intake manifold or vacuum hoses. This can cause incorrect air pressure readings and cause the sensor to receive incorrect information.

 

Missing or Bad Vacuum Pressure: The engine's vacuum pressure affects the pressure values detected by the sensor. This problem can occur if the vacuum hoses are clogged or there is a vacuum leak in the system.




 

EGR (Exhaust Gas Recirculation) System Problems: A malfunction in the exhaust gas recirculation system can affect the pressure values in the intake manifold.

 

Faulty Engine Control Unit (ECU): In rare cases, the vehicle's engine control unit (ECU) may be faulty and not be able to process data correctly.

 



What Steps Should Be Followed to Resolve the P0108 Fault/Error Code?

 

You can follow the steps below to solve the P0108 Fault/Error code:

 

Sensor Check: First, check the Manifold Absolute Pressure (MAP) or Barometric Pressure (BP) sensor. Inspect the physical condition and connections of the sensor. If there is any damage or corrosion, it may be necessary to replace the sensor.

 



Connection Check: Check the cables and ports to which the sensor is connected. It could be loose connections, corrosion, or cable breaks. In this case, it may be necessary to correct or replace the connections.

 

Air Leak Check: Check for air leaks in the intake manifold or vacuum hoses. If there are air leaks, it is important to find and repair the leaks.

 



Vacuum Pressure Check: Check the vacuum pressure of the engine. Check if the vacuum hoses are clogged or if there is a vacuum leak in the system. Clean or replace vacuum hoses as necessary.

 

EGR System Check: Check for a problem with the exhaust gas recirculation (EGR) system. The EGR valve or its connections may be clogged or faulty. It may be necessary to replace problematic parts.

 



Engine Control Unit (ECU) Check: In rare cases, the vehicle's engine control unit (ECU) may be faulty. You can consult a car service or specialist to check whether the ECU is working correctly.

 

In cases where the problem is not resolved after following these steps, it is important to consult an auto mechanic or specialist for further diagnosis. Experts can examine the problem in more detail and make any necessary repairs.

 



What are the Long-Term Effects of the P0108 Fault/Error Code?

 

The long-term effects of a P0108 Fault/Error code can often be on the vehicle's performance, reliability and fuel economy. Here are some areas where this fault code may have long-term effects:

 

Engine Performance and Power Loss: Incorrect air pressure information can make it difficult for the engine to calculate and adjust the correct fuel-air mixture. This may affect the performance of the engine and cause loss of power. The vehicle may have difficulty accelerating and a decrease in torque may occur.




 

Fuel Economy: Not having accurate air pressure information can affect the fuel injection efficiency of the engine. In this case, the vehicle's fuel economy may worsen and it may consume more fuel. In the long run, fuel costs may increase.

 

Emissions and Environmental Effects: Incorrect fuel-air mixture can affect the composition of exhaust gases and increase the vehicle's emissions. This can increase the risk of failing vehicle emissions tests, as well as environmental impacts.

 



Engine and System Damage: Prolonged periods of incorrect air pressure information can place additional stress on the engine and emission control systems. This may cause damage to the engine and systems in the long run. Incorrect fuel-air mixture, especially in the combustion chamber, can lead to engine wear and damage to internal parts.

 

Driving Safety: A decrease in the performance of the vehicle may make it difficult for the driver to control and pose safety risks. Loss of power, especially during acceleration or overtaking, can affect driving safety.

 



The long-term effects of a P0108 fault code can have on the vehicle's overall performance, reliability and fuel economy. When this type of fault code is detected, it is important to resolve the problem as soon as possible and make the necessary repairs.

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