AutoCodes – Honda – P0121 2018 Honda CR-V

P0121 2018 Honda CR-V Code - Throttle Position Sensor 'A' Out of Range

Quick Answer

The electronic throttle control system controls the throttle valve opening. Common causes include Faulty Throttle Body, Throttle Body harness is open or shorted, Throttle Body 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: P0121 2018 Honda CR-V indicates Throttle Position Sensor 'A' Out of Range.
Common causes: Common causes include Faulty Throttle Body, Throttle Body harness is open or shorted, Throttle Body 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.

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Code Popularity 223

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 02, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0121 2018 Honda CR-V Description

The electronic throttle control system controls the throttle valve opening. The system includes the throttle actuator, the throttle valve, Throttle Position (TP) sensors 'A' and 'B', the Electronic Throttle Control System (ETCS) control relay, the Accelerator Pedal Position (APP) sensor, and the Powertrain Control Module (PCM). TP Sensor 'A' is a semiconductor type, and it is attached to the throttle body and shaft to determine the throttle valve position. The throttle valve position signal from TP Sensor 'A' is transmitted to the PCM for target position feedback control. If the signal from TP Sensor 'A' is a fixed value for a set time, the PCM detects a TP Sensor 'A' malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0121 2018 Honda CR-V - Throttle Position Sensor 'A' Out of Range - AutoCodes.com — P0121 2018 Honda CR-V Code - Throttle Position Sensor 'A' Out of Range

What does this mean?

What are the Possible Causes of the DTC P0121 2018 Honda CR-V?

Faulty Throttle Body
Throttle Body harness is open or shorted
Throttle Body circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0121 2018 Honda CR-V?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0121 2018 Honda CR-V 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 P0121 2018 Honda CR-V code?

Need more information on how to fix the P0121 2018 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0121 2018 Honda CR-V code diagnosed by a professional: Find a repair shop in your area

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 P0121 2018 Honda CR-V Code

1. What does OBDII code P0121 on a 2018 Honda CR-V indicate?

Code P0121 indicates that the Throttle Position Sensor 'A' is out of range on the 2018 Honda CR-V.

2. What are the common symptoms of a Throttle Position Sensor 'A' out of range issue on a 2018 Honda CR-V?

Common symptoms include poor acceleration, rough idling, stalling, and potential issues with the vehicle's transmission shifting smoothly.

3. What are the potential causes of OBDII code P0121 on a 2018 Honda CR-V?

Possible causes include a faulty throttle position sensor, wiring issues, a dirty throttle body, or a problem with the vehicle's electronic control module.

4. How can I diagnose the Throttle Position Sensor 'A' out of range issue on my 2018 Honda CR-V?

You can use an OBDII scanner to read the trouble code, check the throttle position sensor's voltage with a multimeter, and inspect the wiring for any visible damage.

5. Can I drive my 2018 Honda CR-V with OBDII code P0121?

It is not recommended to drive your vehicle with code P0121 as it can lead to poor performance and potential safety hazards. It's best to address the issue promptly.

6. How can I repair OBDII code P0121 on my 2018 Honda CR-V?

Repair options include replacing the throttle position sensor, repairing or replacing damaged wiring, cleaning the throttle body, or reprogramming the electronic control module.

7. Is it possible to reset OBDII code P0121 on a 2018 Honda CR-V without fixing the underlying issue?

Resetting the code without addressing the root cause will only temporarily clear the check engine light. The issue will likely reoccur until properly repaired.

8. Will a Throttle Position Sensor 'A' out of range problem impact my 2018 Honda CR-V's fuel efficiency?

Yes, a malfunctioning throttle position sensor can affect fuel efficiency by causing the engine to run inefficiently or by affecting the transmission's shifting patterns.

9. Can a DIY enthusiast fix OBDII code P0121 on a 2018 Honda CR-V?

Depending on the individual's skill level, a DIY enthusiast may be able to diagnose and repair the issue. However, complex repairs or reprogramming may require professional assistance.

10. How much can I expect to pay to repair OBDII code P0121 on my 2018 Honda CR-V?

The cost of repairs for code P0121 can vary depending on the exact cause of the issue and whether you choose to perform the repairs yourself or take your vehicle to a professional mechanic.