P0107 medium Severity

P0107: Manifold Absolute Pressure/Barometric Pressure Sensor Circuit Low Input

Can cause rough idling, poor acceleration, increased fuel consumption, and potential stalling; vehicle may run but drivability is impaired

Overview

P0107 MAP/BARO Sensor Circuit Low - low voltage input from the manifold absolute pressure or barometric pressure sensor circuit indicating electrical fault or sensor failure affecting air intake pressure measurement.

Common Symptoms

  • Illuminated check engine light
  • Rough idling or unstable idle
  • Reduced engine power or poor acceleration
  • Increased fuel consumption
  • Stalling or difficulty starting the engine

Most Common Causes

Faulty MAP sensor high

Sensor fails to produce correct voltage signal due to internal fault

Damaged or corroded wiring/connectors in MAP sensor circuit high

Open or short in signal, reference or ground circuits can pull voltage low

Vacuum leaks affecting intake manifold pressure reading medium

Leaks alter pressure and can contribute to erroneous low voltage signal

Faulty ECM/PCM low

Rare; considered only after sensor and wiring verified good

Diagnostic Steps

  1. Connect OBD-II scanner and confirm P0107 code; record related codes and live data
    Expected: P0107 present with low MAP/BARO signal voltage
    Interpretation: Confirms code validity and context before further tests
  2. Perform visual inspection of MAP sensor, connector and wiring harness
    Expected: No visible damage, corrosion, loose connection
    Interpretation: If damage found, repair/replace and retest
  3. Measure MAP sensor reference and signal voltages with multimeter (key on / engine off and running)
    Expected: 5V reference present; signal between typical idle range (approx 1–4.5V)
    Interpretation: Low or absent signal indicates sensor circuit fault or sensor failure
  4. Check for vacuum leaks in intake manifold and sensor vacuum lines
    Expected: No leaks detected
    Interpretation: Leakes may cause incorrect pressure readings and contribute to low signal
  5. Replace MAP sensor if wiring and vacuum are verified good
    Expected: Restored normal voltage signal and no return of code
    Interpretation: Confirms sensor as root cause

Repair Solutions

Replace MAP sensor medium
Estimated Cost: $80 - $300

Cost varies by vehicle model; sensor replacement often resolves code

Repair or replace damaged wiring/connectors medium
Estimated Cost: $30 - $150

Repair harness, crimps or terminals as needed

Fix vacuum leaks in intake system medium
Estimated Cost: $50 - $200

Replace hoses or gaskets contributing to leakage

ECM reprogramming or replacement (rare) hard
Estimated Cost: $500 - $1500

Only after thorough diagnosis rules out sensor/circuit faults

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Misinterpreting low MAP signal caused by intake vacuum leaks as sensor failure

Frequently Asked Questions

Technical definition of P0107 OBD-II Code

When your OBD-II scanner reads P0107, it means: Manifold Absolute Pressure/Barometric Pressure Sensor Circuit Low Input. This code is related to the vehicle's Air Intake.

Is it safe to drive with a P0107 code?

This is a medium priority issue. Can cause rough idling, poor acceleration, increased fuel consumption, and potential stalling; vehicle may run but drivability is impaired

Symptoms associated with DTC P0107

Common symptoms include: Illuminated check engine light, Rough idling or unstable idle, Reduced engine power or poor acceleration. You might also notice the Check Engine Light is on.

Potential causes for OBDII code P0107

This code is frequently triggered by: Faulty MAP sensor, Damaged or corroded wiring/connectors in MAP sensor circuit, Vacuum leaks affecting intake manifold pressure reading.

Repair cost breakdown for P0107

The cost varies significantly based on the root cause. For example, replacing a Repair or replace damaged wiring/connectors typically costs between $30 and $150, while fixing a ECM reprogramming or replacement (rare) can range from $500 to $1500.

What cars are affected by the P0107 code?

P0107 is not specific to any one brand. It can appear on Ford, Dodge, Toyota, Honda, Jeep, and other vehicles.

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