Question
Why do some TPMS sensors have a “plastic cap” on the valve stem?
Answer
To protect the valve core from dirt and corrosion.
Explain
Caps are lost easily; CHEPQ sensor kits include replacement caps (color-coded for tire position) for fleet organization.
Related Diagnostic Guide
To explore this topic in a broader system-level diagnostic context:
Related Guide: TPMS Diagnostic Guide: System Architecture, Sensor Technology & Advanced Diagnostics
Recommended Diagnostic Solutions
To apply the diagnostic concepts discussed above in real-world scenarios, explore our full range of professional automotive diagnostic tools. These solutions are designed to support battery testing, system diagnostics, and data analysis for modern vehicles and workshop environments.
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Are aftermarket TPMS sensors compatible with all vehicles?
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