Vehicle Speed Sensor (VSS) Input Circuit Low
The VSS input signal is too low for normal operation.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The Vehicle Speed Sensor isn’t sending a strong enough signal to the computer, which tracks how fast the vehicle is going.
What the computer is actually seeing
The computer expects a voltage signal from the VSS between 0.5V and 5V while the vehicle is moving, but it's seeing lower than expected values, possibly below 0.3V.
What a healthy reading looks like
During normal operation, the VSS should output a voltage between 0.5V (stationary) and up to 5V (speed increases); at idle, it should be around 0.5V.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the VSS wiring and connector for damage or corrosion. If damaged, repair or replace as needed. Decision: If wiring is good, go to Step 2; if damaged, fix and retest.
- 22. Check the VSS output using a multimeter. At idle, you should see 0.5V. If not, replace the VSS. Decision: If voltage is within spec, go to Step 3; if not, replace VSS.
- 33. Inspect the ABS module connections. Corrosion or damage can affect the signal. Repair as needed. Decision: If connections are good, go to Step 4; if damaged, fix and retest.
- 44. Check for any other related DTCs. If any are present, address them accordingly. Decision: If there are no other codes, clear the code and test drive; if codes are present, follow appropriate diagnostic steps for those codes.
Common causes
- Damaged VSS
- Corroded or loose connector at the VSS
- Broken or shorted wiring in the sensor circuit
- Malfunctioning vehicle speed sensor output
- ABS module issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s generally safe to drive, but speedometer readings may be inaccurate and can affect stability control systems.
Will this code come back after repair?
If the wiring and sensor are fixed correctly, the code should not return unless there’s a new issue.
Why does this code pair with other codes?
It often pairs with codes related to ABS or other speed-related systems since they all share the VSS signal.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →