P1122 Code – Throttle Position Sensor Circuit Intermittent Low Voltage

If you want to gather all the essential information about the P1122 Code, you’re in the right place. So, keep reading to learn more about the P1122 – Electronic Throttle Control Actuator Code.

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What Does the P1122 Code Mean?

The P1122 code pertains to the Electronic Throttle Control Actuator, which comprises components such as the throttle control motor and Throttle Position Sensor (TPS).

The throttle control motor is responsible for opening and closing the throttle valve, controlled by the Engine Control Module (ECM).

The TPS detects the position of the throttle valve and measures the speed of its opening and closing, and then transmits the voltage signals to the ECM.

Based on these signals, the ECM determines the current angle of the throttle valve and controls the throttle control motor to adjust the throttle valve’s opening angle according to driving conditions.

What is the Cost to Diagnose the Code P1122?

If your car displays the P1122 code, it’s crucial to address the issue immediately to avoid further damage or complications. To ensure you’re not overcharged for repairs, drivers must know the cost of diagnosing the problem.

The cost to diagnose the P1122 code typically involves only 1 hour of labor. However, remember that the exact price may vary depending on factors such as your car’s make and model, the engine type, diagnostic time, and labor rates in your area.

It’s common for auto repair shops to charge anywhere from $75 to $150 per hour for labor, so research and find a reputable mechanic to diagnose and fix the issue reasonably.

How to Fix the P1122 Code?

To start fixing the P1122 code, it is essential first to check the “Possible Causes” outlined in this article. Start by visually inspecting the wiring harness and connectors for damaged, broken, bent, or pushed-out components.

To avoid causing any further damage while trying to clear the P1122 code, taking your vehicle to a trusted mechanic is recommended.

What are the symptoms of code P1122?

There are various indications of the P1122 code in Nissan and other car manufacturers, including but not limited to the following:

Irregular or rough idling
Idling speed exceeding the recommended level
Unpredictable, harsh, or erratic gear shifts
Severe power loss
Fail-safe or limp mode activation leading to unresponsiveness of the throttle and transmission to manual inputs
Unexpected engine stalling, especially at low speeds or when coming to a stop
Illuminated warning light and stored trouble code
Presence of multiple additional codes, particularly those related to no correlation between the throttle pedal position sensor and the throttle position sensor
Difficult or failed engine start
Unexpected or no response to throttle inputs

What are the Possible Causes of the Code P1122?

Here are the possible reasons behind the P1122 code:

A faulty PCM, though uncommon, and other potential issues should be checked before replacing the control module.
A damaged throttle pedal position sensor.
A defective or worn throttle body.
Wiring or connectors in the throttle body’s control signal circuits that are damaged, burnt, shorted, or corroded.
A defective, damaged, or worn throttle position sensor.
Defective or worn drive gears in the throttle body.
A defective or damaged stepper motor in the throttle body.
An electric throttle control actuator circuit with a poor electrical connection.
Excessive carbon build-up could restrict the throttle plate’s free movement.
The use of aftermarket throttle bodies.
It fails to perform required adaptations or relearning after a throttle body replacement.