Code result
P262B
Control Module Power Off Timer Performance
Moderate severity
What it means
The internal power-down timer of the engine controller does not run as expected. The module either stays awake too long after key-off (battery drain) or shuts down too early (no aftertreatment cool-down or learn-write).
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
Intermittent main relay opens early
mediumA plausible cause — test and verify before replacing parts.
Software timer counter corrupted
mediumA plausible cause — test and verify before replacing parts.
Related help
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