Engine-Codes - Cadillac - B1318 CADILLAC

B1318 CADILLAC Code - Left Sunload Sensor

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

|B1318 CADILLAC code possible causes

  • Faulty Left Sunload Sensor
  • Left Sunload Sensor harness is open or shorted
  • Left Sunload Sensor circuit poor electrical connection
  • Faulty Instrument Panel Module (IPM)

|How is the B1318 CADILLAC 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 B1318 CADILLAC code

Labor: 1.0

The cost to diagnose the B1318 CADILLAC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B1318 CADILLAC code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What is B1318 CADILLAC code meaning?

The Instrument Panel Module (IPM) monitors ambient light with the left and right sunload sensors. The sunload sensors are an infrared light sensitive photodiode. The IPM supplies 5 volts to the sunload sensors signal circuit and provides a low reference circuit. As the light shining upon the sensor gets brighter, the sensor conductance increases. The sensor signal decreases as the conductance increases. The IPM uses this information to compensate for the effect of the sun on the inside air temperature of the vehicle. The IPM converts the voltage values to count values where one volt is approximately equal to 51 counts.

|Need more information with the B1318 CADILLAC code?

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|Need help with a B1318 CADILLAC code?

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