B1590 - Autolamp Delay Increase Circuit Short To Ground

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Autolamp Delay
  • Autolamp Delay harness is open or shorted
  • Autolamp Delay circuit poor electrical connection
  • Faulty Body Control Module (BCM)

Possible symptoms

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

B1590 Description

The Body Control Module (BCM) monitors the Autolamp Delay. The BCM sets the OBDII code when the Autolamp Delay is not to factory specifications.
OBDII Code B1590 - Autolamp Delay Increase Circuit Short To Ground - AutoCodes.com

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B1590 Comments

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