P0608
PowertrainVehicle Speedmoderate severityControl Module VSS Output "A" Malfunction
What P0608 Means
The PCM detected a fault in the vehicle speed sensor output signal it sends to other modules. This can affect systems that rely on speed data like the speedometer or transmission.
Symptoms
- Erratic or dead speedometer
- Transmission shifting problems
- Cruise control inoperative
Common Causes
- Faulty PCM
- VSS output circuit wiring fault
- Corroded module connectors
- Internal PCM software fault
Diagnostic Steps
- Scan for related speed sensor codes
- Check VSS output circuit continuity
- Inspect PCM connectors for corrosion
- Test or reflash/replace PCM
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Community Confirmed Fixes
No confirmed fixes yet for this code. Be the first to contribute!
Submit a FixFound a Fix for P0608?
Help other technicians by sharing what worked on your vehicle.
Submit Your Fix