Code result
P0123
Throttle/Pedal Position Sensor/Switch A Circuit High Input
High severity
What it means
The TPS signal voltage exceeds the upper acceptable threshold. As with P0122, limp-home mode is typical until the 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
Signal wire shorted to supply voltage
highOne of the most commonly reported causes for this code — check this first.
Sensor ground broken
mediumA plausible cause — test and verify before replacing parts.
TPS internally failed
lowLess common, but worth ruling out after the more likely causes.
Related help
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