GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2006 🢒 GTO 🢒 DTC 🢒 DTC B0021

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B0021 CD Mechanism Error

Conditions for Setting the DTC

With the ignition in either the Accessories position or the ON position, DTC B0021 will set to indicate that an error message has been received from the CD Changer due to an internal mechanical error.

Diagnostic Aids

This error may indicate the following:

    • Mechanism has an internal fault.
    • Conditions were too severe for the mechanism to operate properly.
    • Mechanism may operate properly after conditions improve.

Test Description

The number below refers to the step number on the diagnostic table.

  1. This step tests the operation of the CD loading mechanism.

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Switch the audio system ON.
  2. Select CD Mode. It may be necessary to try and load a CD.

Does a Mechanism Error appear on the display of the audio system?

Go to Step 3

System OK

3

Replace the audio system head unit. Refer to Radio Replacement .

Did you complete the repair?

Go to Step 4

--

4
  1. Use the scan tool in order to clear the DTCs.
  2. Turn the ignition OFF, then ON again and wait 30 seconds with the radio ON.

Does the DTC reset?

Go to Step 2

System OK