AutoCodes – Dodge – U1402 Dodge

U1402 Dodge Code - Implausible Engine Temperature Signal Received

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Transmission Control Module (TCM) receives a Signal Not Available (SNA) message from the Powertrain Control Module (PCM) or an incorrect Controller Area Network (CAN) message from the PCM. Common causes include Check for Powertrain Control Module (PCM) codes, Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) 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: U1402 Dodge indicates Implausible Engine Temperature Signal Received.
Common causes: Common causes include Check for Powertrain Control Module (PCM) codes, Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) 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 10,424

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1402 Dodge Description

OBDII Code U1402 Dodge - Implausible Engine Temperature Signal Received - AutoCodes.com — U1402 Dodge Code - Implausible Engine Temperature Signal Received

What does this mean?

What are the Possible Causes of the DTC U1402 Dodge?

Check for Powertrain Control Module (PCM) codes
Faulty Transmission Control Module (TCM)
Transmission Control Module (TCM) harness is open or shorted
Transmission Control Module (TCM) circuit poor electrical connection

How to Fix the DTC U1402 Dodge?

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 U1402 Dodge 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 U1402 Dodge code?

Need more information on how to fix the U1402 Dodge code? Get Access to Factory Service Manuals

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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 U1402 Dodge Code

1. What are the common symptoms of U1402 OBDII code in a Dodge vehicle?

- Common symptoms include erratic engine temperature readings on the gauge, overheating warnings, and potential engine performance issues.

2. What are the possible causes of the U1402 code in a Dodge vehicle?

- The U1402 code typically indicates a fault with the Engine Control Module (ECM), faulty engine temperature sensor, wiring issues, or a malfunction in the cooling system.

3. How can I diagnose the U1402 code in my Dodge vehicle?

- Diagnosing the U1402 code involves checking the engine temperature sensor, inspecting the wiring for any damage, and testing the ECM for proper functionality using a diagnostic scanner.

4. Can a faulty engine temperature sensor cause the U1402 code in a Dodge?

- Yes, a faulty engine temperature sensor can trigger the U1402 code by sending implausible temperature readings to the ECM.

5. What are some repair tips for fixing the U1402 code in a Dodge vehicle?

- Repair tips include replacing the engine temperature sensor, repairing any damaged wiring, resetting the ECM, and ensuring the cooling system is functioning properly.

6. Is it safe to continue driving with the U1402 code present in a Dodge vehicle?

- It is not recommended to drive with the U1402 code present as it can lead to engine overheating and potential damage if the actual engine temperature is not accurately monitored.

7. How much does it typically cost to repair the U1402 code in a Dodge vehicle?

- The cost of repairing the U1402 code can vary depending on the underlying cause, but it may range from $100 to $300 for parts and labor.

8. Can a DIY enthusiast fix the U1402 code issue in a Dodge vehicle?

- Depending on the level of expertise, a DIY enthusiast may be able to address the U1402 code by following repair guides and using the necessary tools for sensor replacement or wiring repairs.

9. Will resetting the ECM clear the U1402 code in a Dodge vehicle?

- Resetting the ECM may temporarily clear the U1402 code, but if the underlying issue persists, the code is likely to reappear after driving the vehicle.

10. How long does it take to repair the U1402 code in a Dodge vehicle?

- The repair time for the U1402 code can vary based on the diagnostic process and the specific repair needed, but it typically takes a few hours to a day to address the issue completely.