Engine-Codes - Generic - P1108

P1108 - Dual Alternator Battery Lamp Circuit Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P1108 Possible Causes

  • Engine Control Module (ECM) outdated or incorrect software
  • Faulty Engine Control Module (ECM)

How is the P1108 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P1108 code

Labor: 1.0

The cost to diagnose the P1108 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine rough idle
  • Engine hesitation

P1108 Meaning

The Barometric Pressure (BARO) sensor is built into the Engine Control Module (ECM) and monitors atmospheric pressure. The ECM estimates appropriate intake airflow from the Manifold Absolute Pressure (MAP) sensor output voltage and BARO sensor output voltage. If the BARO sensor output voltage is a specified value or more, the ECM detects a malfunction and a code is stored.

More Information

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Information for specific makes

  • P1108 ACURA Barometric Pressure Sensor Circuit High Voltage
  • P1108 BUICK BARO To MAP Sensor Circuit Comparison Too High
  • P1108 CADILLAC BARO To MAP Sensor Circuit Comparison Too High
  • P1108 CHEVROLET BARO to MAP Sensor Comparison Too High
  • P1108 FORD Dual Alternator Battery Lamp Circuit Malfunction
  • P1108 GMC BARO to MAP Sensor Comparison Too High
  • P1108 HONDA Barometric Pressure Sensor Circuit High Voltage
  • P1108 HYUNDAI Manifold Absolute Pressure Sensor Short Circuit
  • P1108 ISUZU Barometric Pressure Circuit Input High
  • P1108 JAGUAR MAP Sensor Circuit Comparison Too High Voltage
  • P1108 SUBARU Induction Control Solenoid Valve Circuit Malfunction
  • P1108 SUZUKI Manifold Differential Pressure Sensor High Input

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