U0147 - Communication Error in the Vehicle Network (Common in 2014-2018 Jeep Grand Cherokee)

Quick Answer

U0147 means: DTC U0147 indicates a communication error between the Body Control Module and the Instrument Panel Cluster.

Fix: Check and replace faulty components Cost: $150 - $500 Time: 90-180 minutes

Can I drive with U0147? Immediate attention is recommended to prevent further electrical issues.

Common Questions

What does U0147 mean and how does it affect my car?

DTC U0147 indicates that there's a communication issue between your vehicle's Body Control Module and the Instrument Panel Cluster. This can lead to various electrical problems, such as malfunctioning dashboard lights and inoperable accessories. Ignoring this code can escalate into bigger issues, affecting your vehicle's reliability and safety.

What are the most common causes of U0147 and how much does it cost to fix?

Common causes include damaged wiring (60% likelihood), a faulty BCM, and blown fuses. Repair costs can vary widely, with wiring repairs ranging from $150 to $500 and BCM replacements costing between $300 and $600. Always consult with a trusted mechanic for an accurate estimate.

Can I drive my car with U0147 or should I stop immediately?

While you may still be able to drive your car, it's not advisable to do so for long. The communication error can cause other systems to fail, potentially leaving you stranded. It’s best to have the issue diagnosed and repaired as soon as possible.

How can I diagnose U0147 myself using GeekOBD APP?

To diagnose U0147 using the GeekOBD APP, start by connecting the app to your vehicle's OBD2 port. Run a full scan to retrieve all diagnostic trouble codes. Pay attention to freeze frame data for U0147 to understand the context of the failure. Look for any additional codes that may provide further insight into the problem.

What vehicles are most commonly affected by U0147?

DTC U0147 is frequently reported in models like the 2014-2018 Jeep Grand Cherokee, 2015-2018 Dodge Charger, and 2012-2016 Chrysler 300. If you own one of these vehicles, be particularly vigilant about electrical issues.

How can I prevent U0147 from happening again?

To prevent U0147 from occurring, ensure regular maintenance of your vehicle’s electrical system. This includes inspecting wiring for wear and tear, keeping connections clean and secure, and addressing any electrical issues immediately to avoid cascading failures.

What is U0147?

DTC U0147 indicates a communication error between the vehicle's control modules. Specifically, this code suggests that the Body Control Module (BCM) is not receiving messages from the Instrument Panel Cluster (IPC). In simpler terms, your car's system is having trouble talking to itself, which can lead to a variety of operational issues. This communication breakdown can manifest in several ways, including malfunctioning dashboard lights, erratic fuel gauge readings, and even issues with power accessories like windows and locks. For car owners, this could mean that certain features may not work correctly, potentially leaving you stranded if the problem escalates. The underlying reasons for this code could range from a simple wiring issue to a more complex problem involving the modules themselves. It is essential to address this code as soon as possible to prevent further complications, such as complete module failure or greater electrical issues that could impact overall vehicle safety and functionality.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0147 is present:

  • The check engine light or other warning lights on the dashboard may stay illuminated constantly, indicating an issue with communication.
  • You may experience erratic behavior with power windows and locks, where they may operate inconsistently or stop working altogether.
  • The fuel gauge may display incorrect readings, which can lead to running out of gas unexpectedly or filling the tank when it's not needed.
  • There could be issues with the speedometer, which may read inaccurately, leading to potential speeding violations or unsafe driving conditions.
  • Unresponsive or malfunctioning interior lights and other electrical accessories can also occur, affecting the overall convenience of your vehicle.

Possible Causes

Most common causes of U0147 (ordered by frequency):

  1. The most common cause is a damaged or corroded wiring harness, which can account for about 60% of cases. Inspecting and repairing wiring can often solve the issue.
  2. A faulty Body Control Module is another common culprit, which may malfunction due to age or electrical surges, leading to a breakdown in communication with other modules.
  3. A blown fuse related to the BCM or IPC can disrupt communication, making it vital to check and replace any blown fuses during diagnostics.
  4. Less common causes may include software glitches within the BCM or IPC, which can sometimes be resolved with a firmware update by a professional.
  5. In rare cases, a complete failure of the Instrument Panel Cluster may occur, requiring replacement of the entire unit, which can be costly.

U0147 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing or replacing corroded or damaged wiring harness associated with the BCM and IPC.

  • Total: $150 - $500
  • Success rate: 85%
BCM Replacement

Replacing a faulty Body Control Module with a new or refurbished unit.

  • Total: $300 - $600
  • Success rate: 90%
Money-Saving Tips for U0147
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional U0147 Diagnosis Process

Follow these systematic steps to accurately diagnose U0147. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, including the BCM and IPC (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, including the BCM and IPC (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure all systems are functional (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure all systems are functional (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Repair of U0147 in a 2017 Jeep Grand Cherokee

Vehicle: 2017 Jeep Grand Cherokee, 45,000 miles

Problem: Customer reported dashboard warning lights and non-functioning power windows.

Diagnosis: Initial visual inspection revealed frayed wiring in the harness connected to the BCM. Follow-up with the GeekOBD APP confirmed U0147.

Solution: Repaired damaged wiring and replaced a blown fuse related to the BCM.

Cost: $200 (wiring repair and parts included)

Result: All systems returned to normal functionality, and the customer reported no further issues.

Case Study 2: BCM Replacement for U0147 in a 2015 Dodge Charger

Vehicle: 2015 Dodge Charger, 60,000 miles

Problem: Vehicle displayed multiple warning lights, and the fuel gauge was inaccurate.

Diagnosis: Diagnostics pointed to U0147. Component testing indicated a faulty Body Control Module.

Solution: Replaced the BCM with a new unit and reprogrammed it to the vehicle.

Cost: $500 (BCM replacement and labor costs)

Result: Post-repair, all warning lights cleared, and functionality was restored.

Diagnose U0147

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: U0147
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes