OBD2 Error Code P0108: How to Fix It
Medium 45-90 minutes High Severity
Verified June 2026
- Error Code
- P0108
- Brand
- OBD2
- Product Type
- automotive
- Severity
- High
- DIY Difficulty
- Medium
- Estimated Fix Time
- 45-90 minutes
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Tools You'll Need
- OBD2 scanner
- Digital multimeter
- Hand vacuum pump
- Socket wrench set
- Electrical contact cleaner
- Basic hand tools
How to Fix Error Code P0108
-
Turn off engine and ensure safety
Never work on a hot engine. Allow at least 30 minutes cooling time to prevent burns from hot components. -
Locate the MAP sensor
-
Inspect electrical connections
Handle electrical connections gently to avoid breaking fragile plastic connectors. -
Check vacuum lines
-
Test MAP sensor voltage
Be careful around moving engine parts when testing with engine running. -
Perform vacuum test
-
Replace MAP sensor if faulty
Do not overtighten sensor bolts as this can crack the plastic housing. -
Clear codes and test drive
Parts You May Need
MAP sensor
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Vacuum hose
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Electrical connector
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MAP sensor
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Vacuum hose
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Electrical connector
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MAP sensor
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Vacuum hose
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Electrical connector
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MAP sensor
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Vacuum hose
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Electrical connector
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MAP sensor
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Vacuum hose
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Electrical connector
Check Price on Amazon
MAP sensor
Check Price on Amazon
Vacuum hose
Check Price on Amazon
Electrical connector
Check Price on Amazon
MAP sensor
Check Price on Amazon
Vacuum hose
Check Price on Amazon
Electrical connector
Check Price on Amazon
MAP sensor
Check Price on Amazon
Vacuum hose
Check Price on Amazon
Electrical connector
Check Price on Amazon
MAP sensor
Check Price on Amazon
Vacuum hose
Check Price on Amazon
Electrical connector
Check Price on Amazon
MAP sensor
Check Price on Amazon
Vacuum hose
Check Price on Amazon
Electrical connector
Check Price on Amazon
MAP sensor
Check Price on Amazon
Vacuum hose
Check Price on Amazon
Electrical connector
Check Price on Amazon
MAP sensor
Check Price on Amazon
Vacuum hose
Check Price on Amazon
Electrical connector
Check Price on Amazon
MAP sensor
Check Price on Amazon
Vacuum hose
Check Price on Amazon
Electrical connector
Check Price on Amazon
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When to Call a Professional
Contact a professional mechanic if you're uncomfortable working with electrical systems, if the problem persists after sensor replacement, or if you discover wiring damage that extends into the vehicle's main harness. Also seek professional help if you lack the proper diagnostic tools or experience with vacuum system diagnosis.Frequently Asked Questions
Can I drive with P0108 error code?
You should avoid driving with P0108 as it can cause poor engine performance, stalling, and potential engine damage. The engine may run rough or fail to start, making driving unsafe.
What causes MAP sensor to read high voltage?
High voltage readings typically result from a disconnected vacuum line, faulty sensor internal circuitry, corroded electrical connections, or damaged wiring sending false high signals to the ECM.
How much does it cost to fix P0108?
DIY repairs typically cost $30-80 for a new MAP sensor plus any needed vacuum hoses. Professional diagnosis and repair usually ranges from $150-300 depending on labor rates and parts needed.
Will P0108 cause my car to fail emissions testing?
Yes, P0108 will typically cause emissions test failure since it affects air-fuel mixture calculations. The code must be resolved and the readiness monitors reset before passing emissions testing.
How often do MAP sensors need replacement?
MAP sensors typically last 60,000-100,000 miles under normal conditions. However, they can fail earlier due to contamination, electrical issues, or exposure to extreme temperatures.