AutoCodes – Dodge – C1420 Dodge

C1420 Dodge Code - Rear Differential Control Circuit Current Performance

Quick Answer

The Final Differential Control Module (FDCM) monitors the Rear Differential Solenoid. Common causes include Faulty Final Differential Control Module (FDCM), Final Differential Control Module (FDCM) harness is open or shorted, Final Differential Control Module (FDCM) 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 Dodge indicates Rear Differential Control Circuit Current Performance.
Common causes: Common causes include Faulty Final Differential Control Module (FDCM), Final Differential Control Module (FDCM) harness is open or shorted, Final Differential Control Module (FDCM) 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 919

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 27, 2020

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

The Final Differential Control Module (FDCM) monitors the Rear Differential Solenoid. The FDCM sets the OBDII code when the Rear Differential Solenoid is not to factory specifications.

OBDII Code C1420 Dodge - Rear Differential Control Circuit Current Performance - AutoCodes.com — C1420 Dodge Code - Rear Differential Control Circuit Current Performance

What does this mean?

What are the Possible Causes of the DTC C1420 Dodge?

Faulty Final Differential Control Module (FDCM)
Final Differential Control Module (FDCM) harness is open or shorted
Final Differential Control Module (FDCM) circuit poor electrical connection

How to Fix the DTC C1420 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 C1420 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.

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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 C1420 Dodge Code

What does OBDII code C1420 mean for a Dodge vehicle?

OBDII code C1420 indicates a problem with the rear differential control circuit's current performance, which can affect the vehicle's traction control and stability systems.

What are the common symptoms of code C1420?

Common symptoms include warning lights on the dashboard (such as the traction control or ABS light), decreased traction control performance, and abnormal handling or stability issues.

What causes the C1420 code to trigger?

The C1420 code can be triggered by issues such as a faulty rear differential control module, damaged wiring or connectors in the circuit, or a malfunctioning rear differential sensor.

How can I diagnose the C1420 code?

To diagnose the C1420 code, start by using an OBDII scanner to confirm the code, then inspect wiring and connectors for damage, check the rear differential control module, and test related sensors for proper operation.

What are some common repair solutions for code C1420?

Repairs may include replacing a faulty rear differential control module, repairing damaged wiring or connectors, or replacing sensors that are not functioning properly.

Can I drive my Dodge with code C1420?

While it may be possible to drive with code C1420, it is not recommended as it can affect vehicle handling and safety features such as traction control.

How much does it typically cost to fix code C1420?

Repair costs for code C1420 can vary widely depending on the underlying issue, but it may range from a few hundred dollars for wiring repairs to over a thousand dollars for a module replacement.

Is it safe to ignore the C1420 code?

Ignoring the C1420 code is not safe as it can lead to reduced vehicle stability and handling, increasing the risk of accidents.

Can a bad battery cause the C1420 code?

Yes, a weak or failing battery can lead to electrical issues that may trigger the C1420 code, as it affects the power supply to the rear differential control circuit.