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P0122 2018 Honda CR-V Code - Throttle Position Sensor 'A' Circuit Low Voltage

Quick Answer

The P0122 diagnostic trouble code (DTC) for a 2018 Honda CR-V indicates an issue with the Throttle Position Sensor (TPS) 'A' Circuit registering low voltage. Common causes include Faulty Throttle Position Sensor, Wiring issues such as a short circuit or open circuit in the TPS circuit, Corrosion or poor connections in the TPS wiring harness. 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
P0122 2018 Honda CR-V indicates Throttle Position Sensor 'A' Circuit Low Voltage.
Common causes
Common causes include Faulty Throttle Position Sensor, Wiring issues such as a short circuit or open circuit in the TPS circuit, Corrosion or poor connections in the TPS wiring harness.
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 17, 2024
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Code P0122 2018 Honda CR-V Description

The P0122 diagnostic trouble code (DTC) for a 2018 Honda CR-V indicates an issue with the Throttle Position Sensor (TPS) 'A' Circuit registering low voltage. The TPS is a crucial component of the vehicle's electronic control system, as it monitors the position of the throttle valve and sends this information to the engine control module (ECM). The ECM uses this data to determine the appropriate air-fuel mixture for optimal engine performance.

OBDII Code P0122 2018 Honda CR-V - Throttle Position Sensor 'A' Circuit Low Voltage
P0122 2018 Honda CR-V Code - Throttle Position Sensor 'A' Circuit Low Voltage

Common Causes of P0122 2018 Honda CR-V

  1. Faulty Throttle Position Sensor.
  2. Wiring issues such as a short circuit or open circuit in the TPS circuit.
  3. Corrosion or poor connections in the TPS wiring harness.
  4. ECM software or hardware issues affecting TPS communication.
  5. Environmental factors such as moisture or debris affecting TPS operation.

Symptoms of P0122 2018 Honda CR-V

  1. Poor acceleration or hesitation when pressing the gas pedal.
  2. Rough idling or stalling when at a stop.
  3. Decreased fuel efficiency.
  4. Illumination of the Check Engine Light on the dashboard.
  5. In some cases, the vehicle may go into a "limp mode" to protect the engine.

How to Fix P0122 2018 Honda CR-V

  1. Begin by diagnosing the issue using a scan tool to confirm the P0122 code and check the TPS voltage readings.
  2. Inspect the TPS wiring harness for any signs of damage, corrosion, or poor connections. Repair or replace as needed.
  3. Test the TPS sensor itself using a multimeter to ensure it is functioning within specifications. Replace if necessary.
  4. Clear the DTC and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying ECM issues or other potential causes.

Cost to Fix P0122 2018 Honda CR-V

The typical repair costs for addressing a P0122 code on a 2018 Honda CR-V can vary depending on the specific cause of the issue. In general, replacing a faulty Throttle Position Sensor can cost between $100 to $200 for the part, with additional labor costs ranging from $100 to $200. Overall, the total repair cost could range from $200 to $400. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's recommended to check with local shops for a more accurate estimate.

What does this mean?

Tech Notes for P0122 2018 Honda CR-V









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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.

Frequently Asked Questions about P0122 2018 Honda CR-V Code

1. What does OBDII code P0122 on a 2018 Honda CR-V indicate?

The code P0122 in a 2018 Honda CR-V indicates an issue with the Throttle Position Sensor 'A' Circuit, specifically low voltage.

2. What are the common symptoms of OBDII code P0122 in a 2018 Honda CR-V?

Common symptoms of code P0122 in a 2018 Honda CR-V include poor acceleration, stalling, rough idling, and possibly the vehicle going into "limp mode."

3. What are the possible causes of OBDII code P0122 in a 2018 Honda CR-V?

Possible causes of code P0122 in a 2018 Honda CR-V include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or a problem with the engine control module.

4. How can I diagnose the cause of OBDII code P0122 in my 2018 Honda CR-V?

Diagnosing code P0122 in a 2018 Honda CR-V involves checking the throttle position sensor's wiring and connector for damage, testing the sensor's voltage output, and inspecting the engine control module for faults.

5. Can I continue driving my 2018 Honda CR-V with OBDII code P0122?

It is not recommended to drive your 2018 Honda CR-V with code P0122 as it can lead to poor engine performance and potential safety hazards. It's best to address the issue promptly.

6. How do I repair OBDII code P0122 in my 2018 Honda CR-V?

Repairing code P0122 in a 2018 Honda CR-V typically involves replacing the throttle position sensor if faulty, repairing any damaged wiring or connectors, or reprogramming the engine control module if needed.

7. Will resetting the OBDII code P0122 in my 2018 Honda CR-V make the issue go away?

Simply resetting the code without addressing the underlying problem will not fix the issue. It's essential to diagnose and repair the root cause of code P0122 in your 2018 Honda CR-V.

8. Is it possible to prevent OBDII code P0122 from occurring in my 2018 Honda CR-V?

Regular maintenance of your 2018 Honda CR-V, such as checking the throttle position sensor's condition during tune-ups, can help prevent code P0122. Timely repairs of any related issues can also prevent this code from occurring.

9. How much does it typically cost to repair OBDII code P0122 in a 2018 Honda CR-V?

The cost of repairing code P0122 in a 2018 Honda CR-V can vary depending on the exact cause of the issue. Replacing a faulty throttle position sensor can cost around $100 to $200, while addressing wiring or module issues may incur additional expenses.

10. Can a DIY enthusiast repair OBDII code P0122 in a 2018 Honda CR-V?

While some aspects of diagnosing and repairing code P0122 may be accessible to DIY enthusiasts, dealing with sensors, wiring, and modules can be complex. It's recommended to consult a professional mechanic for accurate diagnosis and repair of this issue.

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