Code result
P2D78
Battery Charger Control Module B Processor Performance
High severity
What it means
The battery charger control module B reports a processor performance fault. CPU watchdog or RAM check failed.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
CPU watchdog repeatedly resets
highOne of the most commonly reported causes for this code — check this first.
RAM check failed
mediumA plausible cause — test and verify before replacing parts.
Module software outdated, reflash may resolve
lowLess common, but worth ruling out after the more likely causes.
Related help
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