DTC code
P0106
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance
Technical guide
Symptoms
- lack of power
- rough idle
- idle speed too high or too low
Probable causes
- clogged or cracked vacuum line to the sensor
- electrical problems with the sensor wiring or connector or PCM power supply
- faulty MAP/BARO sensor
- dirty throttle body
- problems with the EGR system
- bad mass airflow sensor (MAF)
- PCV system problems
- engine mechanical problems
- clogged catalytic converter or blocked exhaust
- PCM software needs to be updated
Diagnostic steps
- With ignition ON, check the +5V reference voltage and ground at the sensor using a voltmeter.
- Check signal voltage with ignition key ON, engine OFF (KOEO).
- Using a scan tool in Data Monitor mode, check MAP sensor reading with engine OFF — it should match the BARO sensor reading.
- At idle, reading should be around 15-20 inches Hg.
- Apply vacuum to the sensor and observe if reading changes.
- If reading does not change, the sensor is bad or clogged.
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
Models most reported with this code (NHTSA)
Count of distinct owner complaints mentioning the code. US data — same engines, same failures.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on P0106
Nothing confirmed yet for this code. No guess is offered on purpose.
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