AutoCodes – Generic – U1148

U1148 Code - Additional CAN-C ECU Detected

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Totally Integrated Power Module (TIPM) detects an additional Controller Area Network (CAN) C Bus module and requires reprogramming. Common causes include Additional Module Added/Removed From the CAN Interior Bus Network, Faulty Totally Integrated Power Module (TIPM). 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: U1148 indicates Additional CAN-C ECU Detected.
Common causes: Common causes include Additional Module Added/Removed From the CAN Interior Bus Network, Faulty Totally Integrated Power Module (TIPM).
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 12,789

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 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1148 Description

The Diagnostic Trouble Code (DTC) sets when the Totally Integrated Power Module (TIPM) detects an additional Controller Area Network (CAN) C Bus module and requires reprogramming.

OBDII Code U1148 - Additional CAN-C ECU Detected - AutoCodes.com — U1148 Code - Additional CAN-C ECU Detected

What does this mean?

What are the Possible Causes of the DTC U1148?

Additional Module Added/Removed From the CAN Interior Bus Network
Faulty Totally Integrated Power Module (TIPM)

How to Fix the DTC U1148?

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 U1148 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 U1148 code?

Need more information on how to fix the U1148 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1148 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U1148 Chrysler — Additional CAN-C ECU Detected
U1148 Dodge — Additional CAN-C ECU Detected
U1148 Jeep — Additional CAN-C ECU Detected
U1148 RAM — Additional CAN-C ECU Detected

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 U1148 Code

1. What are common symptoms of OBDII code U1148 (Additional CAN-C ECU Detected)?

- Common symptoms may include issues with the vehicle's communication network, such as intermittent or complete loss of communication with certain ECUs.

2. What can cause the OBDII code U1148 to trigger?

- The U1148 code can be triggered by a faulty CAN-C bus, a short circuit in the communication network, or the presence of an additional ECU not recognized by the vehicle's systems.

3. How can I diagnose the OBDII code U1148?

- Diagnosis typically involves using a diagnostic scanner to check for communication faults on the CAN-C bus and inspecting the wiring and connectors for any issues.

4. Can a loose or corroded connection cause the U1148 code to appear?

- Yes, loose or corroded connections in the CAN-C communication network can lead to the U1148 code being triggered due to poor signal transmission.

5. What are some repair tips for addressing the U1148 code?

- Repair tips may include checking and repairing any damaged wiring, ensuring all connections are secure, and resetting the fault codes to see if the issue persists.

6. Is it safe to continue driving with the U1148 code present?

- It is generally not recommended to drive with the U1148 code active, as it may indicate potential communication issues that could affect the vehicle's performance or safety systems.

7. Can a DIY enthusiast fix the U1148 code at home?

- Depending on the underlying cause, some DIY enthusiasts may be able to address the U1148 code by checking connections and performing basic wiring repairs. However, professional diagnosis may be needed for more complex issues.

8. Will resetting the fault codes make the U1148 code disappear permanently?

- Resetting the fault codes may temporarily clear the U1148 code, but if the root cause of the issue is not addressed, the code is likely to reappear upon the next system check.

9. How much does it typically cost to repair the U1148 code at a mechanic or dealership?

- Repair costs for the U1148 code can vary depending on the specific cause and required repairs, but it is advisable to consult with a mechanic or dealership for an accurate estimate.

10. Can the U1148 code be related to other diagnostic trouble codes (DTCs) in the vehicle?

- Yes, the U1148 code may be related to other DTCs, especially those concerning communication errors or issues with the CAN bus system. It is important to address all codes to ensure proper vehicle operation.