AutoCodes – RAM – U1433 RAM

U1433 RAM Code - Implausible Igntion Switch Status Message Received

Quick Answer

The Body Control Module (BCM) monitors the hardwired ignition switch input circuit from the Radio Frequency (RF) Hub module and compares it to the ignition switch status message received over the Controller Area Network (CAN) bus. Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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: U1433 RAM indicates Implausible Igntion Switch Status Message Received.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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 6,272

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 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1433 RAM Description

The Body Control Module (BCM) monitors the hardwired ignition switch input circuit from the Radio Frequency (RF) Hub module and compares it to the ignition switch status message received over the Controller Area Network (CAN) bus. The Diagnostic Trouble Code (DTC) sets when the RF Hub receives a Bussed Input message of the Ignition Switch status from the BCM. If that message does not agree with the RF Hub Ignition Switch status, this code will set. The BCM also sends an Ignition Switch "Sensor" message. If the RF Hub and the BCM do not agree on Both of those messages, the Powertrain Control Module (PCM) will not allow the engine to start.

OBDII Code U1433 RAM - Implausible Igntion Switch Status Message Received - AutoCodes.com — U1433 RAM Code - Implausible Igntion Switch Status Message Received

What does this mean?

What are the Possible Causes of the DTC U1433 RAM?

Faulty Body Control Module (BCM)
Body Control Module (BCM) harness is open or shorted
Body Control Module (BCM) circuit poor electrical connection
Faulty Radio Frequency Hub (RF Hub)

How to Fix the DTC U1433 RAM?

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 U1433 RAM 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 U1433 RAM Code

1. What are the common symptoms of OBDII code U1433?

- Common symptoms include issues with the ignition switch, such as difficulty starting the vehicle or the engine not turning off properly.

2. What does the OBDII code U1433 RAM mean?

- The code U1433 indicates that an implausible ignition switch status message was received by the vehicle's onboard computer.

3. What are the potential causes of code U1433 RAM?

- Possible causes include a faulty ignition switch, wiring issues, communication errors within the vehicle's network, or a malfunctioning control module.

4. How can I diagnose the U1433 code?

- Diagnosing the code typically involves using a diagnostic scanner to retrieve the stored codes, checking for any related symptoms, and testing the ignition switch and related components.

5. How serious is the U1433 code?

- While the code itself may not cause immediate drivability issues, it is important to address it promptly to ensure proper functioning of the ignition system and related components.

6. Can I continue driving with the U1433 code present?

- It is generally not recommended to continue driving with the U1433 code, as it can lead to potential problems with the ignition system and affect the overall performance of the vehicle.

7. How can I repair the U1433 code?

- Repairing the U1433 code may involve replacing the faulty ignition switch, repairing any damaged wiring, addressing communication issues, or reprogramming the control module.

8. Will resetting the code make it go away permanently?

- Simply resetting the code may temporarily clear the warning, but if the underlying issue is not addressed, the code is likely to reappear. It is best to diagnose and repair the root cause of the problem.

9. Are there any DIY fixes for code U1433 RAM?

- Depending on the specific cause, some DIY fixes may include checking and cleaning the ignition switch contacts, inspecting wiring for damage, or ensuring proper connections within the vehicle's network.

10. Can a professional mechanic help with diagnosing and repairing the U1433 code?

- Yes, a qualified mechanic with experience in diagnosing OBDII codes can help identify the root cause of the U1433 code and perform the necessary repairs to resolve the issue effectively.