AutoCodes – Lincoln – U0402 Lincoln

U0402 Lincoln Code - Invalid Data Received From Transmission Control Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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: U0402 Lincoln indicates Invalid Data Received From Transmission Control Module.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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 2,054

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 Apr 08, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0402 Lincoln Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. Some devices are constantly receiving information from other devices through serial data communication network. The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Transmission Control Module (TCM) causing its integrity to be questioned.

OBDII Code U0402 Lincoln - Invalid Data Received From Transmission Control Module - AutoCodes.com — U0402 Lincoln Code - Invalid Data Received From Transmission Control Module

What does this mean?

What are the Possible Causes of the DTC U0402 Lincoln?

Faulty Transmission Control Module (TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC U0402 Lincoln?

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

Check for other Powertrain Control Module (PCM) codes or PCM related symptoms. Diagnose all other PCM codes or PCM related symptoms first.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0402 Lincoln 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.

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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 U0402 Lincoln Code

1. What does the OBDII code U0402 mean for a Lincoln vehicle?

The U0402 code indicates "Invalid Data Received From Transmission Control Module," meaning the powertrain control module (PCM) has detected unreliable or corrupted data from the transmission control module (TCM).

2. What are the common symptoms of the U0402 code in Lincoln vehicles?

Symptoms can include a check engine light, erratic shifting, poor acceleration, decreased fuel efficiency, and, in some cases, limp mode activation.

3. What causes the U0402 code to appear in a Lincoln?

Common causes include a faulty transmission control module (TCM), wiring or connection issues in the communication network, a malfunctioning PCM, or software glitches.

4. Can the U0402 code cause drivability issues in a Lincoln?

Yes, it can lead to drivability problems such as erratic shifting, reduced performance, and limp mode, which restricts the vehicle's speed and gear options for protection.

5. How is the U0402 code diagnosed in a Lincoln?

A technician will use a scan tool to check for additional codes, inspect the wiring and connectors for damage, verify network communication, and test the TCM and PCM functionality.

6. Can a faulty TCM cause the U0402 code in a Lincoln?

Yes, a malfunctioning TCM is a common cause of the U0402 code, as it can send incomplete or corrupted data to the PCM.

7. Is it safe to drive a Lincoln with the U0402 code active?

While the vehicle may still be drivable, itâ€™s not recommended since the code can lead to performance issues and potential transmission damage over time.

8. How can I fix the U0402 code on my Lincoln?

Repairs may involve replacing or reprogramming the TCM, fixing damaged wiring or connectors, updating PCM software, or, in rare cases, replacing the PCM.

9. Can a software update fix the U0402 code on a Lincoln?

Yes, if the issue is caused by outdated or corrupted software, updating the PCM or TCM software can resolve the problem.

10. What tools are needed to diagnose the U0402 code on a Lincoln?

A professional OBDII scan tool capable of reading manufacturer-specific codes and a multimeter to check electrical connections are essential for accurate diagnosis.