P0108 on Honda Civic FC: Manifold Absolute Pressure/Barometric Pressure Circuit High Input

Short answer: P0108 means “Manifold Absolute Pressure/Barometric Pressure Circuit High Input”. The car’s computer has found a fault in the Engine system and turns on the Check engine light (MIL). First check: read the code and freeze-frame data with an OBD-II scanner.

Standard OBD-II code Same meaning on all cars (SAE J2012). Not checked against this car’s factory manual.

Code

P0108

System

Engine

Dashboard light

Check engine light (MIL)

Applies to

Generic OBD-II meaning. Not every code is used by this car.

Confidence

medium (generic OBD-II definition, not checked against the factory manual for this car)

Source

obd-codes.com

Symptoms and when it is set

1. Check engine light on
2. Engine may run poorly
3. Engine may not run at all
4. Presence of black smoke at exhaust

Likely causes

1. Potential causes of a P0108 code
2. Bad
3. MAP sensor
4. Leak in vacuum supply line to MAP sensor
5. Engine vacuum leak
6. Short on signal wire to PCM
7. Short on reference voltage wire from PCM

What to check, in order

1. Read the code and freeze-frame data with an OBD-II scanner
2. Check the connector and wiring of the part named in the code
3. Test the part with scanner live data or a multimeter, using the values in the repair manual
4. Fix the cause, clear the code and test-drive

Related on this car

• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

Same code on other cars

• P0108 · Toyota Passo (1st gen)
• P0108 · Toyota Corolla (11th gen, E170)
• P0108 · Toyota Corolla (10th gen, E140)
• P0108 · Honda City (5th gen, GM2)
• P0108 · Suzuki Wagon R (Pakistan, K10B)
• P0108 on all cars compared

← P0107 P0110 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.