P1106 OBD-II Trouble Code: MAP/BARO Pressure Circuit Range/Performance Problem

Diagnostic Trouble Code (DTC): P1106 - MAP/BARO Pressure Circuit Range/Performance Problem

By Parker Hill

P1106 code definition

The P1106 code is a manufacturer specific powertrain code noting an issue with the Manifold Absolute Pressure (MAP) or Barometric (BARO) sensor.

This code can be related to several manufacturers, including (but not limited to) Acura, Buick, Cadillac, Chevrolet, Chrysler, Dodge, Ford, GMC, Honda, Hyundai, Lincoln, and Mercury. Note that each vehicle manufacturer will have some differences regarding the location, diagnosis, and/or repair for this trouble code, so be sure to check your vehicle service manual for specifics. In addition, each manufacturer has subtle differences regarding whether the code is related to the sensor or solenoid.

Codes related to the P1106 include:

• P0068: MAP/MAF – Throttle Position Correlation
• P0069: Manifold Absolute Pressure – Barometric Pressure Correlation
• P0105: Manifold Absolute Pressure/Barometric Pressure Circuit
• P0106: Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
• P0107: Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
• P0108: Manifold Absolute Pressure/Barometric Pressure Circuit High Input
• P0109: Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
• P0129: Barometric Pressure Too Low
• P1105: Manifold Absolute Pressure/Barometric Pressure Switch Solenoid Valve
• P2226: Barometric Pressure Circuit
• P2227: Barometric Pressure Circuit Range/Performance
• P2228: Barometric Pressure Circuit Low
• P2229: Barometric Pressure Circuit High
• P2230: Barometric Pressure Circuit Intermittent Engine misfire codes may also be present

What the P1106 code means

A code P1106 will be stored when the engine control module (ECM) has detected an abnormally high or low voltage signal from the MAP sensor or BARO sensor, depending on vehicle make and model.

The ECM has a BARO sensor built into it in order to monitor the atmospheric pressure. Taking the MAP sensor output voltage and BARO sensor output voltage, the ECM will estimate how much intake airflow is needed.

What causes the P1106 code?

Several problems may cause a P1106 code including:

• Damaged or defective MAP sensor
• Damaged or defective BARO sensor
• Damaged, corroded, shorted, or open wiring and related electrical connectors
• Outdated ECM
• Incorrect software installed on ECM
• Damaged or defective ECM

What are the symptoms of the P1106 code?

Symptoms of a P1106 code may include:

• Check engine or warning light may illuminate
• Vehicle may idle roughly
• Engine may hesitate
• Decrease in fuel economy
• Dark or black smoke from exhaust

How does a mechanic diagnose the P1106 code?

A mechanic may use several methods to diagnose a P1106 trouble code, including:

• Utilize an OBD-II scanner to check for a stored P1106 trouble code
• Visually inspect wiring and related electrical connections for signs of corrosion or damage
• Check for any airflow issues in the engine, such as unmetered air or an insufficient air supply
• Check to ensure the filters are clear and clean
• Check for any possible vacuum leaks
• Check for any clogged pipes or catalytic convert(s)
• Check to ensure the MAP/BARO sensors are in working order by checking for power and ground at each sensor

Common mistakes when diagnosing the P1106 code

It is recommended to always check and repair all electrical wiring and related components before replacing any sensors or related parts to avoid unnecessary repairs. Always consult a professional mechanic when working with the electrical components of your vehicle as one wrong probe or connection can cause much larger complications.

How serious is the P1106 code?

Because a vehicle’s safe driving operation most likely will be impacted due to faults that store a P1106 code, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.

What repairs can fix the P1106 code?

Several repairs can fix a P1106 trouble code and include:

• Repair damaged or defective electrical wiring and related components
• Repair any airflow issues that may be occurring related to the engine
• Clean and/or replace clogged filters
• Repair any vacuum leaks
• Clear clogged catalytic converter(s)
• Replace damaged or defective MAP sensor
• Replace damaged or defective BARO sensor
• Repair or replace damaged or defective ECM (rare) and reprogram
• Clear all codes, test-drive the vehicle, and rescan to see if any codes reappear

Additional information related to a P1106 code

Additional codes related to engine misfires or Manifold Air Pressure (MAP) may accompany a P1106 code. To avoid expensive unneeded repairs, is recommended that a mechanic always diagnose and repair trouble codes in the order in which they appear on a scanner.

Need help with a P1106 code?

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