Mazda B2821: Closure Motor Circuit Malfunction

Is your scanner showing Mazda B2821?
No worries. We'll show you what it means and how to deal with it.

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OVERVIEW

Severity

Medium

DIY Difficulty Level

Intermediate

Repair Cost

$100-$300

Can I Still Drive?

Yes (Short-term only)

What Does The Mazda B2821 Code Mean?

Liftgate latch switch signal does not change (ON) when closure motor is operating

Closure motor malfunction
Open circuit in wiring harness between PLG control module terminal 1A and closure motor terminal A (liftgate latch and lock actuator)
Open circuit in wiring harness between PLG control module terminal 1B and closure motor terminal B (liftgate latch and lock actuator)
Liftgate latch switch malfunction
A short circuit to ground in the wiring harness between the liftgate latch switch and PLG control module
PLG control module malfunction