AutoCodes – Generic – C1420

C1420 Code - Acceleration Sensor Malfunction

Quick Answer

The Skid Control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system. Common causes include Faulty Yaw Rate Sensor (Built-In Acceleration Sensor), Yaw Rate Sensor harness is open or shorted, Yaw Rate Sensor 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: C1420 indicates Acceleration Sensor Malfunction.
Common causes: Common causes include Faulty Yaw Rate Sensor (Built-In Acceleration Sensor), Yaw Rate Sensor harness is open or shorted, Yaw Rate Sensor 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 8,753

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 Sep 28, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1420 Description

The Skid Control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system. The yaw rate sensor has a built-in acceleration sensor and detects the vehicle's condition using 2 circuits. The Skid Control ECU monitors the Acceleration Sensor. The Skid Control ECU sets the OBDII code when the Acceleration Sensor is not to factory specifications.

OBDII Code C1420 - Acceleration Sensor Malfunction - AutoCodes.com — C1420 Code - Acceleration Sensor Malfunction

What does this mean?

What are the Possible Causes of the DTC C1420?

Faulty Yaw Rate Sensor (Built-In Acceleration Sensor)
Yaw Rate Sensor harness is open or shorted
Yaw Rate Sensor circuit poor electrical connection

How to Fix the DTC C1420?

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 C1420 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 C1420 code?

Need more information on how to fix the C1420 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1420 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1420 Chrysler — Rear Differential Control Circuit Current Performance
C1420 Dodge — Rear Differential Control Circuit Current Performance
C1420 Jeep — Rear Differential Control Circuit Current Performance
C1420 Lexus — Acceleration Sensor Malfunction
C1420 Scion — Acceleration Sensor Malfunction
C1420 Toyota — Acceleration Sensor 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.

Frequently Asked Questions about C1420 Code

1. What are the common symptoms of OBDII code C1420 (Acceleration Sensor Malfunction)?

- Common symptoms include erratic acceleration, sudden loss of power, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code C1420?

- Possible causes include a faulty acceleration sensor, damaged wiring or connectors, or issues with the sensor's calibration.

3. How can I diagnose the OBDII code C1420 on my vehicle?

- Diagnosing this code typically involves using a professional OBDII scanner to read the code and inspecting the acceleration sensor and related components for any visible damage.

4. Can I continue driving my vehicle with OBDII code C1420 present?

- It is not recommended to continue driving your vehicle with this code present, as it can lead to unsafe driving conditions and potential further damage to the vehicle.

5. What are some repair tips for addressing OBDII code C1420?

- Repair tips may include checking and repairing any damaged wiring or connectors, recalibrating or replacing the acceleration sensor, and clearing the code to see if the issue reoccurs.

6. Is it necessary to visit a mechanic to fix OBDII code C1420?

- While some DIY enthusiasts may be able to address this code themselves, it is generally recommended to visit a mechanic with experience in diagnosing and repairing acceleration sensor malfunctions.

7. How much does it typically cost to repair OBDII code C1420?

- Repair costs can vary depending on the extent of the issue and the specific repairs needed, but they may range from a few hundred to several hundred dollars.

8. Can a faulty acceleration sensor cause other issues in the vehicle?

- Yes, a faulty acceleration sensor can cause other issues such as poor engine performance, transmission problems, and compromised vehicle stability control systems.

9. Are there any preventative measures to avoid OBDII code C1420 from occurring?

- Regular maintenance checks, avoiding rough driving conditions, and promptly addressing any unusual symptoms can help prevent acceleration sensor malfunctions and related OBDII codes.

10. How long does it typically take to repair OBDII code C1420?

- The repair time can vary depending on the specific issue and the availability of parts, but it may take several hours to a full day to diagnose and repair the acceleration sensor malfunction.