Engine-Codes - Buick - B1600 Buick

B1600 Buick Code - Mirror Motor Vertical Circuit

- Code Popularity: 791 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC B1600 Buick?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Driver/Passenger Rearview Mirror Motor
  • Driver/Passenger Rearview Mirror Motor harness is open or shorted
  • Driver/Passenger Rearview Mirror Motor circuit poor electrical connection
  • Faulty Driver Door Module (DDM) or Passenger Door Module (PDM)

Code Tech Notes

B1600 01 Mirror Motor Vertical Circuit Short to Battery
B1600 02 Mirror Motor Vertical Circuit Short to Ground
B1600 04 Mirror Motor Vertical Circuit Open

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How to Fix the DTC B1600 Buick?

Check 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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B1600 Buick code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the B1600 Buick Code Mean?

The Driver Door Module (DDM) or Passenger Door Module (PDM) controls the mirror horizontal and vertical motors through the use of bi-directional motor controls. When the mirror is commanded up and down, voltage or ground is supplied to the mirror vertical motor through the mirror motor vertical control circuit and voltage or ground is supplied through the mirror motor common control circuit.
Horizontal controls operate in the same manner with the mirror motor horizontal control circuit supplying voltage or ground and the mirror motor common control circuit supplying voltage or ground to the mirror horizontal motor when the mirror is commanded right and left.

B1600 Buick Code - Mirror Motor Vertical Circuit

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