OBD-II Generic Error Code P0608: How to Fix It

Q: What does error code P0608 mean?

P0608 indicates a malfunction in the control module's vehicle speed sensor (VSS) output A circuit, affecting speed readings for transmission, cruise control, and speedometer.

Q: Can I drive with a P0608 code?

You may be able to drive short distances, but symptoms like harsh shifting, no cruise control, or speedometer issues may occur. It's best to diagnose and fix promptly.

Q: What causes a P0608 code?

Common causes include a faulty speed sensor, damaged wiring or connectors, a damaged tone ring, or a failing ECM/PCM.

Q: How do I fix error code P0608?

Start by inspecting and testing the speed sensor and its wiring. Use an OBD2 scanner to confirm the code. If the sensor is bad, replace it. If not, check the tone ring and ECM connections.

Q: Do I need to reprogram the ECM after replacing it?

Yes, replacing the ECM usually requires programming to match your vehicle, which often needs a dealer or specialized shop.

Abstract

Error code P0608 indicates a problem with the control module's vehicle speed sensor (VSS) output A circuit. This means the engine control module (ECM) has detected an issue with the speed signal it receives from the transmission or wheel speed sensors, which can affect transmission shifting, cruise control, and speedometer accuracy.