Manifold Absolute Pressure Sensor Circuit Range/Performance
The P0106 code means the vehicle's onboard diagnostic system has detected: Manifold Absolute Pressure Sensor Circuit Range/Performance. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $30-$100 for a MAP sensor part (~$150-$250 installed); a vacuum-leak repair runs ~$150-$1,000 and an intake manifold gasket ~$300-$810 if that is the cause
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Common Symptoms
- Check Engine Light on
- Rough idle
- Hesitation or stumble
- Incorrect idle speed
- Poor fuel economy
Probable Causes (Ranked by Likelihood)
- Faulty MAP sensor Very High
- Vacuum leak at MAP sensor port or hose High
- Clogged MAP sensor vacuum port Moderate
- Wiring issue causing erratic signal Moderate
- Intake manifold leak Low
Step-by-Step Diagnostic Procedure
-
At key-on/engine-off, MAP sensor voltage should read approximately 4.5-5V (atmospheric pressure). At idle it should drop to 1-2V.
-
Check the vacuum hose connecting the MAP sensor to the intake manifold for cracks or loose fit.
-
Clear the MAP sensor port with a short piece of wire. Carbon can clog the small opening.
-
Monitor MAP sensor readings vs. expected values at different RPMs.
-
Compare MAP to a known barometric pressure reading to verify calibration.
Common Fixes by Vehicle
What techs usually find when diagnosing P0106 on specific vehicles — tap your vehicle for the fix and the exact part:
2010-2020 Chevrolet Cruze/Equinox 1.4L Turbo Easy DIY
MAP sensor performance issue on the 1.4L turbo. Check for boost leaks at the charge pipe and intercooler connections first -- unmetered air causes the MAP and MAF readings to disagree. The MAP sensor (ACDelco 12592016) is on the intake manifold. Clean the sensor port of carbon buildup. Also check the turbo wastegate actuator for proper operation.
Labor: 15-30 min2007-2018 Jeep Wrangler/Cherokee 3.6L Pentastar Easy DIY
MAP sensor barometric pressure reading is out of range. Check the vacuum hose from the intake manifold to the MAP sensor for cracks or disconnection. If the hose is intact, replace the MAP sensor (Mopar 56041018AB). Also check for intake manifold gasket leaks that affect manifold vacuum readings.
Labor: 15-20 min2009-2018 Dodge Ram 5.7L Hemi Easy DIY
MAP sensor reading does not correlate with throttle position. Check for a large vacuum leak at the intake manifold plenum gasket -- the Hemi intake manifold uses a rubber gasket that hardens and leaks over time. If no vacuum leak is found, replace the MAP sensor (Mopar 56041018AB) on the intake manifold. Clean the sensor port before installing the new sensor.
Labor: 15 min2008-2019 Honda Accord/CR-V 2.4L Easy DIY
MAP sensor signal is out of expected range. On the K24 engine, check the vacuum hose to the MAP sensor for cracks. Also check for a sticking PCV valve that can affect manifold vacuum. Replace the MAP sensor (Honda 37830-RNA-A01) if the voltage is not within spec (about 1.0V at idle). Perform a throttle body clean and idle relearn after replacement.
Labor: 15-20 minFrequently Asked Questions
What is the difference between MAP and MAF sensors?
A MAF sensor directly measures air mass flowing into the engine. A MAP sensor measures intake manifold vacuum and the ECU calculates air mass from that, engine speed, and temperature. Many modern engines use both.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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