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P0121

Throttle Position Sensor — Reading Out of Range

Medium — fix within daysDrive with caution

Severity: Fix within days. Drive with caution and watch for new symptoms.

What P0121 means

The sensor that tracks how far open the throttle is reports a position that does not match what the computer expects from the gas pedal.

Common causes

How to fix it

Clean the throttle body, check the sensor wiring, and test or replace the sensor if its reading stays off.

Can I drive with P0121?

You may feel hesitation, surging, or a lack of response from the gas pedal. Drive carefully.

Related codes

Questions, answered

Is it safe to drive with code P0121?

You can drive short distances carefully; watch for worsening symptoms. You may feel hesitation, surging, or a lack of response from the gas pedal. Drive carefully.

What causes code P0121?

The most common causes are: Worn throttle position sensor; Damaged wiring or connector; Dirty throttle body; Failing throttle body assembly. A scan tool and a visual check of the parts above is where a technician starts.

How do I fix code P0121?

Clean the throttle body, check the sensor wiring, and test or replace the sensor if its reading stays off.

Not repair advice. This page gives general information about code P0121 only. Cars differ by make, model and year — confirm the fault with a scan tool and have the repair done by a qualified technician.

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