Code result
P0122
Throttle/Pedal Position Sensor/Switch A Circuit Low Input
High severity
What it means
The TPS signal voltage is below the lower acceptable threshold. The ECU usually enters limp-home mode and limits engine torque while the fault is active.
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 ground
highOne of the most commonly reported causes for this code — check this first.
TPS internally failed
mediumA plausible cause — test and verify before replacing parts.
5V reference voltage to TPS missing
lowLess common, but worth ruling out after the more likely causes.
Related help
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