AutoCodes – Lincoln – B2420 Lincoln

B2420 Lincoln Code - Power Liftgate/Trunk Sensor 2 Invalid

Quick Answer

When the power liftgate moves in the close direction, the Liftgate/Trunk Module (LTM) monitors the pinch strips and motor position sensor for obstacle detection. Common causes include Liftgate alignment, Faulty Power Liftgate/Trunk Sensor 2, Power Liftgate/Trunk Sensor 2 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: B2420 Lincoln indicates Power Liftgate/Trunk Sensor 2 Invalid.
Common causes: Common causes include Liftgate alignment, Faulty Power Liftgate/Trunk Sensor 2, Power Liftgate/Trunk Sensor 2 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 966

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 Dec 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2420 Lincoln Description

When the power liftgate moves in the close direction, the Liftgate/Trunk Module (LTM) monitors the pinch strips and motor position sensor for obstacle detection. If the LTM detects an obstacle, it reverses the power liftgate. The LTM monitors the left and right pinch strips and if either pinch strip is pressed the LTM reverses the power liftgate. The LTM monitors the position sensor feedback for position and movement. If the LTM is unable to determine the liftgate position or the movement indicates an obstacle the LTM reverses the power liftgate. The LTM also monitors the power liftgate latch status once the liftgate closes to a secondary latch position. If the liftgate is unable to obtain a primary latch position the LTM aborts the power close.

OBDII Code B2420 Lincoln - Power Liftgate/Trunk Sensor 2 Invalid - AutoCodes.com — B2420 Lincoln Code - Power Liftgate/Trunk Sensor 2 Invalid

What does this mean?

What are the Possible Causes of the DTC B2420 Lincoln?

Liftgate alignment
Faulty Power Liftgate/Trunk Sensor 2
Power Liftgate/Trunk Sensor 2 harness is open or shorted
Power Liftgate/Trunk Sensor 2 circuit poor electrical connection
Faulty Power liftgate latch
Faulty Power liftgate motor
Faulty Liftgate/Trunk Module (LTM)

How to Fix the DTC B2420 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2420 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.

Need more information about the B2420 Lincoln code?

Need more information on how to fix the B2420 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 B2420 Lincoln Code

What does the OBDII code B2420 mean on a Lincoln?

The B2420 code indicates an issue with the Power Liftgate/Trunk Sensor 2, which is sending invalid or incorrect signals to the vehicleâ€™s control module.

What are common symptoms of the B2420 code on a Lincoln?

Symptoms may include the power liftgate or trunk not opening, closing, or latching properly, as well as possible warning lights or error messages on the dashboard.

What causes the B2420 code to appear?

Common causes include a faulty liftgate sensor, damaged wiring or connectors, misalignment of the liftgate, or a malfunctioning liftgate control module.

Can I still use my liftgate if the B2420 code is present?

In some cases, the liftgate may still work manually, but automatic opening or closing functions might be disabled or unreliable.

How can I diagnose the B2420 code on a Lincoln?

Start by inspecting the liftgate sensor and wiring for damage or loose connections. Use a diagnostic scan tool to confirm the code and test the sensorâ€™s functionality.

Can the B2420 code be caused by a misaligned liftgate?

Yes, a misaligned liftgate can interfere with sensor readings and trigger this code. Realigning the liftgate may resolve the issue.

How do I fix the B2420 code on my Lincoln?

Repairs may include replacing the liftgate sensor, repairing damaged wiring, or reprogramming or replacing the liftgate control module if necessary.

Is the B2420 code a serious issue?

While itâ€™s not safety-critical, it can be inconvenient since the liftgate or trunk may not function properly, and ignoring it could lead to further damage.

Can I clear the B2420 code without making repairs?

You can clear the code with a diagnostic tool, but if the underlying issue isnâ€™t resolved, the code will likely return.

Should I take my Lincoln to a professional for the B2420 code?

If youâ€™re unable to diagnose or repair the issue yourself, itâ€™s best to consult a professional mechanic who has experience with Lincoln vehicles and liftgate systems.