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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 761 (ABS COMPONENTS)DTC TROUBLESHOOTINGDTC 21, 22, 23, 24: MAGNETIC ENCODER MALFUNCTION
2006 Chevrolet Cobalt SS, 4D Sedan, Standard

DTC 21, 22, 23, 24: Magnetic Encoder Malfunction

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION DTC 21, 22, 23, 24: Magnetic Encoder Malfunction
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Turn the ignition switch to LOCK (0).
  4. Test-drive the vehicle at 19 mph (30 km/h) or more.
    NOTE: Drive the vehicle on the road, not on a lift.
  5. Check for DTCs with the HDS.

    Is DTC 21, 22, 23, or 24 indicated? 

    YES  -Go to step 6.

    NO  -The system is OK at this time.

  6. Inspect the appropriate magnetic encoder for damage, debris, and correct installation.
    DTC CHART

    DTC Appropriate Magnetic Encoder Note
    21 Right-front Remove the driveshaft outboard joint from the appropriate wheel hub (see KNUCKLE/HUB/WHEEL BEARING REPLACEMENT ).
    22 Left-front
    23 Right-rear Remove the hub bearing unit (see HUB BEARING UNIT REPLACEMENT ).
    24 Left-rear

    Is the magnetic encoder OK? 

    YES  -Check for loose terminals in the ABS modulator-control unit 47P connector. If necessary, substitute a known-good ABS modulator-control unit (see ABS MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ), and retest.

    NO  -Remove the debris from the magnetic encoder, or replace the wheel bearing (front) or the hub bearing unit (rear):

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.