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P1106 Cadillac Code - Manifold Absolute Pressure Sensor Circuit Intermittent High Voltage

Quick Answer

The P1106 Cadillac code indicates an issue with the Manifold Absolute Pressure (MAP) sensor circuit, specifically intermittent high voltage. Common causes include Faulty MAP Sensor: The sensor itself may be malfunctioning, causing intermittent high voltage readings, Wiring Issues: Damaged or corroded wiring connections between the sensor and ECM can lead to voltage spikes, Vacuum Leaks: Any leaks in the intake manifold or vacuum lines can affect sensor readings and trigger this code. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1106 Cadillac indicates Manifold Absolute Pressure Sensor Circuit Intermittent High Voltage.
Common causes
Common causes include Faulty MAP Sensor: The sensor itself may be malfunctioning, causing intermittent high voltage readings, Wiring Issues: Damaged or corroded wiring connections between the sensor and ECM can lead to voltage spikes, Vacuum Leaks: Any leaks in the intake manifold or vacuum lines can affect sensor readings and trigger this code.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P1106 Cadillac Description

The P1106 Cadillac code indicates an issue with the Manifold Absolute Pressure (MAP) sensor circuit, specifically intermittent high voltage. The MAP sensor is responsible for measuring the pressure inside the intake manifold and providing this data to the engine control module (ECM) to calculate air/fuel mixture and engine timing. When the sensor detects high voltage intermittently, it can lead to incorrect readings being sent to the ECM, which can result in poor engine performance, reduced fuel efficiency, and potential drivability issues. If not addressed, this issue can cause further damage to the engine and emissions control system.

OBDII Code P1106 Cadillac - Manifold Absolute Pressure Sensor Circuit Intermittent High Voltage
P1106 Cadillac Code - Manifold Absolute Pressure Sensor Circuit Intermittent High Voltage

Common Causes of P1106 Cadillac

  1. Faulty MAP Sensor: The sensor itself may be malfunctioning, causing intermittent high voltage readings.
  2. Wiring Issues: Damaged or corroded wiring connections between the sensor and ECM can lead to voltage spikes.
  3. Vacuum Leaks: Any leaks in the intake manifold or vacuum lines can affect sensor readings and trigger this code.
  4. ECM Malfunction: A problem with the engine control module can also cause erroneous sensor readings.

Symptoms of P1106 Cadillac

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Engine Performance: The vehicle may experience a lack of power, hesitation, or rough idling due to incorrect sensor readings.
  3. Poor Fuel Efficiency: The ECM may not be able to adjust the air/fuel mixture properly, leading to decreased fuel efficiency.
  4. Stalling: In severe cases, the vehicle may stall or have difficulty starting due to inaccurate sensor data.

How to Fix P1106 Cadillac

  1. Diagnose the Issue: Use a scan tool to confirm the P1106 code and perform further testing to pinpoint the exact cause of the high voltage readings.
  2. Inspect Wiring: Check the wiring harness for any damage or corrosion, and repair or replace as necessary.
  3. Test MAP Sensor: Test the MAP sensor using a multimeter to ensure it is functioning correctly, and replace if faulty.
  4. Check for Vacuum Leaks: Inspect the intake manifold and vacuum lines for leaks and repair any found.
  5. Clear Codes: Once the repair is completed, clear the trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1106 Cadillac

The cost of repairing a P1106 Cadillac code can vary depending on the specific cause of the issue. On average, the cost of replacing a MAP sensor can range from $100 to $300, including parts and labor. However, if the issue is related to wiring or other components, the cost may be higher. Additionally, diagnostic time and labor rates at auto repair shops can affect the overall cost, so it is recommended to get a detailed estimate from a trusted mechanic.

When is the Code Detected?

If the Powertrain Control Module (PCM) detects a Manifold Absolute Pressure (MAP) sensor signal voltage that is intermittently high, the P1106 code will set.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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