Code result
P2DA4
Coolant Heater A Internal Control Module Performance
Moderate severity
What it means
The internal control module of coolant heater A reports a performance fault. Internal self-tests fail.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Internal module fault
highOne of the most commonly reported causes for this code — check this first.
Firmware corruption
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Module software outdated, reflash may resolve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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