Vehicle Speed Sensor Malfunction 2
1997-2001 Subaru Impreza 2.2L H4
Description
The PCM has detected a malfunction in the secondary vehicle speed sensor or its circuit. Subaru uses multiple speed inputs for comparison and verification.
Symptoms
- Check Engine Light
- Speedometer may be erratic
- Cruise control may not work
- Transmission shift points may be incorrect
Common Causes
- Faulty vehicle speed sensor 2
- Wiring issue in VSS 2 circuit
- Damaged VSS connector
- Tone ring damage or debris
- Instrument cluster speed signal fault
Diagnostic Steps
- Monitor VSS 2 signal on scan tool during driving
- Compare VSS 1 and VSS 2 readings
- Inspect VSS 2 connector and wiring
- Check for debris on VSS tone ring
- Test VSS 2 output signal
Repair Notes
Replace the vehicle speed sensor 2 if it is not providing a correct signal.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1540 on Other Vehicles
Common Questions
What does code P1540 mean on a 1997-2001 Subaru Impreza?
P1540 stands for "Vehicle Speed Sensor Malfunction 2". The PCM has detected a malfunction in the secondary vehicle speed sensor or its circuit. Subaru uses multiple speed inputs for comparison and verification.
What are the symptoms of P1540 on a Subaru Impreza?
Common symptoms of P1540 include: Check Engine Light, Speedometer may be erratic, Cruise control may not work, Transmission shift points may be incorrect.
What causes P1540 on a 1997-2001 Subaru Impreza?
Common causes of P1540 include: Faulty vehicle speed sensor 2, Wiring issue in VSS 2 circuit, Damaged VSS connector, Tone ring damage or debris, Instrument cluster speed signal fault.