P0106 medium Severity

P0106: Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

Check Engine light illuminated; potential rough idle, poor acceleration, and reduced fuel economy

Overview

OBD‑II code P0106 indicates an issue with the MAP (Manifold Absolute Pressure) or BARO (Barometric Pressure) sensor circuit, where the voltage output is outside the expected range, often due to sensor fault, wiring issues, or intake leaks

Common Symptoms

  • Check Engine light illuminated
  • Rough idle
  • Poor acceleration
  • Reduced fuel economy
  • Engine stalling or hesitation

Most Common Causes

Faulty MAP sensor or integrated BARO sensor high

Sensor readings outside expected voltage range can trigger the code

Vacuum leaks or intake manifold air leaks high

Leaks can cause incorrect manifold pressure readings

Damaged, corroded, or loose wiring/connectors to MAP/BARO sensor high

Intermittent or poor electrical connection affects signal integrity

Intake system obstructions or clogged air filter medium

Restricted airflow alters pressure readings

PCM/ECM software or internal fault low

Rare; consider only after eliminating sensor and wiring issues

Diagnostic Steps

  1. Connect OBD‑II scanner and confirm P0106 code; check for additional related codes
    Expected: Code P0106 present with possible related intake or sensor codes
    Interpretation: Ensures accurate starting point for diagnosis
  2. Visually inspect MAP/BARO sensor wiring and connector for corrosion, damage, or looseness
    Expected: Wiring and connector intact, clean, and secure
    Interpretation: Damaged wiring or poor connections can cause erroneous sensor readings
  3. Measure MAP sensor voltage with multimeter at key‑on engine off, then at idle and under load
    Expected: Voltage changes smoothly approximately ~1–1.5 V at idle and ~4.5 V at WOT
    Interpretation: Non‑varying or out‑of‑range readings indicate sensor or circuit issues
  4. Check intake system for vacuum leaks using smoke test or vacuum gauge
    Expected: No air leaks detected
    Interpretation: Leaks cause pressure discrepancies leading to P0106
  5. Replace suspected faulty MAP/BARO sensor and clear codes; road test
    Expected: Code does not return after replacement
    Interpretation: Confirms sensor was the root cause

Repair Solutions

Replace faulty MAP/BARO sensor medium
Estimated Cost: $80 - $300

Cost varies by vehicle make and sensor type; labor may increase total cost

Repair or replace damaged wiring/connectors medium
Estimated Cost: $50 - $200

Includes cleaning corroded terminals or repairing harness damage

Fix vacuum leaks in intake manifold or hose systems medium
Estimated Cost: $50 - $250

Depends on the location and type of leak

Clean or replace clogged air filters and intake passages easy
Estimated Cost: $10 - $50

May improve airflow but might not resolve sensor circuit issues

ECM/PCM software update or replacement hard
Estimated Cost: $200 - $800

Consider only after thorough diagnostics of sensor and wiring

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Replacing the MAP sensor when the real cause is intake manifold vacuum leaks
  • Replacing MAP sensor without checking wiring harness and connectors
  • Misattributing poor idle or performance to MAP code without diagnosing EGR or idle control issues

Frequently Asked Questions

What does a P0106 diagnostic trouble code signify?

When your OBD-II scanner reads P0106, it means: Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem. This code is related to the vehicle's Air Intake.

Should I stop driving if I have P0106?

This is a medium priority issue. Check Engine light illuminated; potential rough idle, poor acceleration, and reduced fuel economy

What are the symptoms of P0106?

You may experience the following: Check Engine light illuminated, Rough idle, Poor acceleration.

Common triggers for the P0106 error

It can be caused by several factors, most notably: Faulty MAP sensor or integrated BARO sensor, Vacuum leaks or intake manifold air leaks, Damaged, corroded, or loose wiring/connectors to MAP/BARO sensor.

Is P0106 expensive to fix?

The cost varies significantly based on the root cause. For example, replacing a Clean or replace clogged air filters and intake passages typically costs between $10 and $50, while fixing a ECM/PCM software update or replacement can range from $200 to $800.

Does code P0106 apply to Chevrolet vehicles?

Yes, P0106 is a generic code that applies to all OBD-II compliant vehicles, including Ford, Toyota, Honda, Chevrolet, Nissan, Dodge, BMW, and more.

User Comments (0)

Share your experience or ask a question about this code.

Be the first to share your experience with P0106!