AutoCodes – Generic – C2420

C2420 Code - Motor Temperature Sensor High Input

Quick Answer

The Electro Hydraulic Power Steering (EHPS) is assistance steering ability system uses an electrical motor that generates oil pressure not to use the Engine power. Common causes include Contamination of Oil/Clog of Oil path, Faulty Motor Pump Unit (MPU), Motor Pump Unit (MPU) harness is open or shorted. 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: C2420 indicates Motor Temperature Sensor High Input.
Common causes: Common causes include Contamination of Oil/Clog of Oil path, Faulty Motor Pump Unit (MPU), Motor Pump Unit (MPU) harness is open or shorted.
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 1,675

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C2420 Description

The Electro Hydraulic Power Steering (EHPS) is assistance steering ability system uses an electrical motor that generates oil pressure not to use the Engine power. The Temperature Sensor is installed in the Motor Pump Unit (MPU) in order to measure oil temperature, This sensor uses a thermistor whose resistance changes according to the temperature changes. The MPU ECU perform limit current control to prevent from over-heating and motor speed control according to viscosity changes. This Diagnostic Trouble Code (DTC) code is set when supplied over current or input too high temperature to MPU ECU, in order to protect MPU ECU. The MPU not perform EHPS control.

OBDII Code C2420 - Motor Temperature Sensor High Input - AutoCodes.com — C2420 Code - Motor Temperature Sensor High Input

What does this mean?

What are the Possible Causes of the DTC C2420?

Contamination of Oil/Clog of Oil path
Faulty Motor Pump Unit (MPU)
Motor Pump Unit (MPU) harness is open or shorted
Motor Pump Unit (MPU) circuit poor electrical connection

How to Fix the DTC C2420?

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 C2420 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 C2420 code?

Need more information on how to fix the C2420 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C2420 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C2420 Hyundai — Motor Temperature Sensor High Input
C2420 KIA — Motor Temperature Sensor High Input

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 C2420 Code

1. What are the common symptoms of OBDII code C2420 (Motor Temperature Sensor High Input)?

- Common symptoms include overheating of the motor, engine performance issues, and illumination of the check engine light.

2. What are the possible causes of OBDII code C2420?

- The code C2420 can be caused by a faulty motor temperature sensor, wiring issues in the sensor circuit, or a malfunctioning engine control module (ECM).

3. How can I diagnose the OBDII code C2420?

- To diagnose OBDII code C2420, you can use a scan tool to read the code, perform a visual inspection of the sensor and wiring, and test the sensor's resistance with a multimeter.

4. What is the repair process for OBDII code C2420?

- The repair process for code C2420 involves replacing the faulty motor temperature sensor, repairing any damaged wiring, and clearing the code with a scan tool.

5. Can I drive my vehicle with OBDII code C2420?

- It is not recommended to drive your vehicle with OBDII code C2420, as it can lead to potential engine damage or overheating issues.

6. Are there any DIY tips to troubleshoot OBDII code C2420?

- You can start troubleshooting code C2420 by checking the sensor's wiring connections, ensuring proper sensor mounting, and inspecting for any signs of physical damage.

7. How much does it typically cost to repair OBDII code C2420?

- The cost to repair OBDII code C2420 can vary depending on the labor rates and parts costs, but it is generally affordable when addressing the sensor or wiring issues.

8. What happens if I ignore OBDII code C2420?

- Ignoring OBDII code C2420 can result in potential engine overheating, reduced fuel efficiency, and possible engine damage if left unresolved.

9. Can a bad motor temperature sensor cause other issues in the vehicle?

- Yes, a bad motor temperature sensor can cause other issues such as poor engine performance, increased emissions, and potential damage to engine components.

10. Is it possible to prevent OBDII code C2420 from occurring in the future?

- You can help prevent OBDII code C2420 by performing regular vehicle maintenance, checking the sensor and wiring periodically, and addressing any issues promptly to avoid sensor failures.