Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
VSS Check
Vehicle Speed Sensor (VSS) sends vehicle speed signal from transaxle to ECM. VSS input to ECM is used to calculate amount of EGR and to engage TCC.
VSS generated check engine light is load sensitive and will go on and off with load. VSS will turn on check engine light only if ECM does not see VSS signal for at least 26 seconds under a MVS load of from 25-50%. Check engine light will go off as load falls below 25%, and will go on again if load exceeds 25% for at least 10 seconds.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.