P0609
PowertrainVehicle Speedmoderate severityControl Module VSS Output "B" Malfunction
What P0609 Means
The PCM found a problem with a second vehicle speed sensor output signal circuit. Modules depending on this speed data may behave abnormally.
Symptoms
- Inaccurate speed reading
- Shift quality issues
- Speed-dependent features fail
Common Causes
- Faulty PCM
- VSS "B" output wiring fault
- Poor connector contact
- Internal module error
Diagnostic Steps
- Retrieve all stored codes
- Check VSS "B" output circuit wiring
- Inspect and clean module connectors
- Reprogram or replace PCM
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Community Confirmed Fixes
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