P0609

Symptoms

• The Check Engine light comes on
• Problems with systems using VSS Channel B
• Incorrect operation of automatic transmission or cruise control
• Errors in the navigation system or odometer
• Additional error codes from related systems

Causes

• Open or short circuit in channel B VSS output signal circuit
• Damage to the connector or wiring of channel B consumers
• ECU output driver internal fault
• Malfunction of the device receiving the channel B signal
• Poor contact in the ECU ground circuit

How to Fix

1. Determine from the diagram which systems use VSS channel B on this vehicle
2. Read error codes from all control units
3. Check channel B VSS circuit wiring and connectors
4. Measure the ECU output signal with an oscilloscope at the corresponding terminal
5. Eliminate detected breaks or short circuits in the wiring
6. If the external circuit is working properly - ECU diagnostics

Related codes

Error P0609 by Vehicle Brand