Code result
P2104
Throttle Actuator Control System — Forced Idle
High severity
What it means
The ECU has detected a fault severe enough that it forces the throttle actuator to the idle stop. The driver loses pedal authority — only idle is available until the underlying TAC fault clears.
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
Severe upstream TAC fault
highOne of the most commonly reported causes for this code — check this first.
Throttle position signal invalid
mediumA plausible cause — test and verify before replacing parts.
Related help
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