Question
What is “signal shadowing” in TPMS diagnostics?
Answer
It’s RF signal blockage from metal objects (lifts, battery packs) causing duplicated or missing packets.
Explain
In workshops, metal tire lifts or EV battery plates reflect TPMS signals, leading to misreads. CHEPQ tools use error-correction algorithms (read 3 consecutive packets) to filter out shadowing effects.
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