AutoCodes – Generic – P1122

P1122 Code - Throttle Position Sensor Circuit Intermittent Low Voltage

Quick Answer

Electric Throttle Control Actuator consists of throttle control motor, Throttle Position Sensor (TPS), etc. Common causes include Faulty Electric Throttle Control Actuator, Electric Throttle Control Actuator harness is open or shorted, Electric Throttle Control Actuator circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1122 indicates Throttle Position Sensor Circuit Intermittent Low Voltage.
Common causes: Common causes include Faulty Electric Throttle Control Actuator, Electric Throttle Control Actuator harness is open or shorted, Electric Throttle Control Actuator circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 89,279

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 04, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1122 Description

Electric Throttle Control Actuator consists of throttle control motor, Throttle Position Sensor (TPS), etc. The throttle control motor is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve position, and the opening and closing speed of the throttle valve and feeds the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.

OBDII Code P1122 - Throttle Position Sensor Circuit Intermittent Low Voltage - AutoCodes.com — P1122 Code - Throttle Position Sensor Circuit Intermittent Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1122?

Faulty Electric Throttle Control Actuator
Electric Throttle Control Actuator harness is open or shorted
Electric Throttle Control Actuator circuit poor electrical connection

How to Fix the DTC P1122?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1122 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1122 code?

Need more information on how to fix the P1122 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1122 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1122 Acura — Throttle Position Sensor Signal Higher Than Expected
P1122 BMW — Pedal Position 1 Low Input
P1122 Buick — Throttle Position Sensor Circuit Intermittent Low Voltage
P1122 Cadillac — Throttle Position Sensor Circuit Intermittent Low Voltage
P1122 Chevrolet — Throttle Position Sensor Circuit Intermittent Low Voltage
P1122 Dodge — IAT Sens Circ Interm High Voltage
P1122 Ford — Throttle Position Sensor Circuit Intermittent Low Voltage
P1122 GMC — Throttle Position Sensor Circuit Intermittent Low Voltage
P1122 Honda — Throttle Position Sensor Signal Higher Than Expected
P1122 Hyundai — Boost Pressure Control Valve
P1122 Infiniti — Electric Throttle Control Performance Problem
P1122 Isuzu — Throttle Position Sensor Circuit Higher Than Expected
P1122 Land Rover — Accelerator Pedal Position Sensor Short Circuit To Ground
P1122 Lexus — Coolant Flow Control Valve Position Sensor Circuit Low
P1122 Mazda — Throttle Position Sensor Stuck Closed Lower Than Expected
P1122 MINI — Pedal Position 1 Low Input
P1122 Nissan — Electric Throttle Control Performance Problem
P1122 Pontiac — Throttle Position Sensor Circuit Intermittent Low Voltage
P1122 Saturn — Throttle Position Sensor Circuit Intermittent Low Voltage
P1122 Subaru — Pressure Sources Switching Valve Circuit High Input
P1122 Toyota — Coolant Flow Control Valve Position Sensor Circuit Low
P1122 Volkswagen — Coolant Flow Control Valve Position Sensor Circuit Low

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.