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Engine-Codes – Generic – P1194

P1194 Code - Throttle Actuator Control System Limp Home-Throttle Position Sensor 2 Position Malfunction

Quick Answer

The diagnostic trouble code (DTC) P1194 refers to a problem with the Throttle Actuator Control System, specifically related to the Throttle Position Sensor 2 (TPS2) position malfunction. Common causes include Faulty Throttle Position Sensor 2, Wiring or connector issues in the throttle control system, ECM malfunction. 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
P1194 indicates Throttle Actuator Control System Limp Home-Throttle Position Sensor 2 Position Malfunction.
Common causes
Common causes include Faulty Throttle Position Sensor 2, Wiring or connector issues in the throttle control system, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P1194 Description

The diagnostic trouble code (DTC) P1194 refers to a problem with the Throttle Actuator Control System, specifically related to the Throttle Position Sensor 2 (TPS2) position malfunction. The throttle actuator control system is responsible for managing the throttle valve opening in response to driver input. The TPS2 is a crucial sensor that monitors the position of the throttle valve and sends this information to the engine control module (ECM) to adjust fuel delivery and ignition timing accordingly.

OBDII Code P1194 - Throttle Actuator Control System Limp Home-Throttle Position Sensor 2 Position Malfunction
P1194 Code - Throttle Actuator Control System Limp Home-Throttle Position Sensor 2 Position Malfunction

Common Causes of P1194

  1. Faulty Throttle Position Sensor 2
  2. Wiring or connector issues in the throttle control system
  3. ECM malfunction
  4. Mechanical issues with the throttle actuator
  5. Environmental factors such as moisture or debris affecting sensor operation

Symptoms of P1194

  1. Reduced engine power
  2. Poor acceleration
  3. Rough idling
  4. Stalling
  5. Decreased fuel efficiency

How to Fix P1194

  1. Perform a thorough inspection of the throttle actuator control system and TPS2 sensor.
  2. Test the TPS2 sensor for proper operation and voltage output.
  3. Check wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  4. Reset the ECM and clear the error code to see if the issue persists.
  5. If the problem persists, replace the faulty TPS2 sensor or address any other underlying causes identified during the diagnostic process.

Cost to Fix P1194

The cost of repairing a Throttle Actuator Control System Limp Home-Throttle Position Sensor 2 Position Malfunction can vary depending on the specific cause of the issue and the vehicle's make and model. In general, replacement of a faulty TPS2 sensor can range from $100 to $300, including parts and labor. Additional costs may apply if there are wiring or ECM issues that need to be addressed. Diagnosis time and labor rates at auto repair shops can vary, so it's recommended to obtain a detailed estimate from a qualified technician.

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Code P1194 Information for Specific Makes

  • P1194 Buick — O2 Low Reference Circuit High Voltage (NOx Sensor 1)
  • P1194 Cadillac — O2 Low Reference Circuit High Voltage (NOx Sensor 1)
  • P1194 Chevrolet — O2 Low Reference Circuit High Voltage (NOx Sensor 1)
  • P1194 Dodge — HO2S Insufficient Transition Time Ratio Bank 2 Sensor 1
  • P1194 Ford — Engine Control Unit A/D Converter
  • P1194 GMC — O2 Low Reference Circuit High Voltage (NOx Sensor 1)
  • P1194 Hyundai — Throttle Actuator Control System Limp Home-Throttle Position Sensor 2 Position Malfunction
  • P1194 KIA — Throttle Actuator Control System Limp Home-Throttle Position Sensor 2 Position Malfunction
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.

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