P0106 Code Meaning and Next Steps

First checks take 10 to 15 minutes for the first checks. No special tools are usually needed for the first checks.

Can you keep driving?

Stop driving if any of these apply

!The engine starts running much worse, stalls, or the warning light flashes.
!The vehicle begins to overheat or lose power sharply while the code is active.

If the light is steady and the vehicle still drives normally: Often yes for a short time, but it should not be ignored.

What to check first

Step-by-step checks

1
Free - no tools
Compare the MAP reading at idle, during a light throttle sweep, and with the key on engine off if scan data is available
2
Free - no tools
Inspect the vacuum source, intake boot, and nearby hoses for cracks, loose fit, or restrictions
3
Basic tool needed
Check the connector and wiring for looseness or corrosion before changing parts
4
Basic tool needed
If the vehicle recently had intake work, verify the hose routing and sensor mounting first
5
Basic tool needed
If lean or fuel-trim codes are present too, treat them as part of the same air-path diagnosis

If the code returns

-If the signal is plausible but consistently off, the sensor may be biased rather than completely dead.
-If the reading changes when the harness is moved, wiring deserves a closer look.
-If the code remains after vacuum leaks are fixed, a sensor test or replacement becomes more useful.

Background

What this code means

P0106 is a generic OBD-II manifold absolute pressure (MAP) sensor code.

The signal may still exist, but it does not line up with vacuum, throttle, or engine load the way the ECU expects.

Hesitation, poor acceleration, inconsistent idle quality, or bad fuel trims are common clues with this code.

Diagnosis

Common causes

Most common

Vacuum leak

A leak can make the MAP reading fall outside the expected performance range.

Common

Biased MAP sensor

The sensor may still work, but not accurately enough for the ECU.

Common

Wiring or connector issue

A connection problem can distort the signal enough to trip range/performance logic.

Possible

Engine mechanical issue

A genuine low-vacuum condition can also make the signal look wrong.

Avoid these mistakes

What not to do

xDo not replace the sensor first if there is an obvious wiring, connector, or intake issue.
xDo not ignore drivability changes just because the code sounds like a sensor problem.

Parts

Parts that may need replacing

PartTypical costNotes

MAP sensor$40-$160Relevant when the signal is off even after vacuum and wiring checks.

Vacuum hose or intake repair$10-$120Worth checking if a leak or restriction is found.

Connector repair$15-$90Useful if the plug or pins are loose or damaged.

Related OBD codes

P0105

P0105 usually means the MAP sensor circuit has a malfunction.

P0107

P0107 usually means the MAP signal is reading too low.

P0108

P0108 usually means the MAP signal is reading too high.

P0171

P0171 usually means bank 1 is running too lean.

Source notes

Generic OBD-II (SAE J1979 / ISO 15031-5). P0106 was expanded around common MAP range/performance issues, including vacuum leaks, sensor bias, and wiring faults.

This guide is written as a generic multi-make reference, so bulletin history, sensor locations, and repair order can still change by manufacturer and engine family.

This is generic OBD-II guidance and should not override vehicle-specific service information. Exact diagnosis and repair steps vary by make, engine family, and model year.

Last reviewed: 2026-04-10

Reference: Open reference

P0106 - P0106 Usually Means the Map Signal Is Outside the Expected Range or Performance Window