P0108 on 1996-1999 Honda Civic — Manifold Absolute Pressure/Barometric Pressure Circuit High Input
1 vehicles · 1 makes · $40-$180 repair
Most Reported On
P0108 is an OBD-II diagnostic trouble code meaning “Manifold Absolute Pressure/Barometric Pressure Circuit High Input.” The PCM detects an abnormally high voltage signal from the MAP/BARO sensor circuit, above the expected range for the engine's operating condition. It often means the sensor reports high manifold pressure when the PCM expects low pressure (such as at idle). Symptoms include reduced fuel economy, poor performance, rough running, and an illuminated check engine light. This code is most commonly reported on 1996-1999 Honda Civic, with repair costs ranging from $40 to $180.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P0108.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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Vehicles Affected (1)
FAQ
What does P0108 mean?
P0108 stands for "Manifold Absolute Pressure/Barometric Pressure Circuit High Input." The PCM detects an abnormally high voltage signal from the MAP/BARO sensor circuit, above the expected range for the engine's operating condition. It often means the sensor reports high manifold pressure when the PCM expects low pressure (such as at idle). Symptoms include reduced fuel economy, poor performance, rough running, and an illuminated check engine light.
What are the most common causes of P0108?
The most common causes of P0108 are: Faulty MAP/BARO sensor, Short to voltage in the MAP signal circuit, Disconnected or leaking vacuum supply to the sensor, Wiring or connector damage at the sensor, Restricted exhaust or clogged catalytic converter raising manifold pressure, Failed PCM (rare). The specific cause varies by vehicle.
How much does it cost to fix P0108?
Repair costs for P0108 range from $40 to $180, depending on the vehicle and root cause.
Which vehicles are affected by P0108?
Au7o has documented P0108 across 1 vehicle models from 1 manufacturers: Honda.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.