U0173 - Communication Issue in 2015-2018 Ford F-150 and Other Models

Quick Answer

U0173 means: U0173 signifies a communication error between the instrument cluster and the PCM.

Fix: Check and replace faulty components Cost: $300 - $800 Time: 90-180 minutes

Can I drive with U0173? Immediate attention is recommended to prevent further vehicle malfunction.

Common Questions

What does U0173 mean and how does it affect my car?

U0173 indicates a communication issue between your car's instrument cluster and the powertrain control module (PCM). This can result in inaccurate readings for speed, RPM, and fuel levels, potentially leading to unsafe driving conditions if left unaddressed.

What are the most common causes of U0173 and how much does it cost to fix?

The most common causes of U0173 include a faulty instrument cluster (60% of cases), damaged wiring, and poor connections. Repair costs can range from $100 for wiring repairs to $800 for a full instrument cluster replacement.

Can I drive my car with U0173 or should I stop immediately?

While you may be able to drive with the U0173 code, it's unsafe due to the potential for inaccurate readings. It's advisable to address the issue immediately to avoid further complications.

How can I diagnose U0173 myself using GeekOBD APP?

You can use the GeekOBD APP to scan for DTCs and view freeze frame data. Check for any additional codes related to the instrument cluster, and inspect wiring and connectors visually.

What vehicles are most commonly affected by U0173?

U0173 is frequently found in models such as the 2015-2018 Ford F-150, Ford Explorer, and certain Chevrolet models. Always check for any recalls or technical service bulletins related to your vehicle's symptoms.

How can I prevent U0173 from happening again?

To prevent U0173, regularly inspect wiring and connections during routine maintenance. Keeping your vehicle's electrical system clean and free from corrosion is also crucial.

What is U0173?

The diagnostic trouble code (DTC) U0173 indicates a communication issue between the instrument cluster and the vehicle's powertrain control module (PCM). This code typically arises when the PCM cannot receive data from the instrument cluster, which can lead to various operational problems. In practical terms, this means that essential information such as speed, RPM, and fuel level may not be accurately displayed, or may not be displayed at all. A malfunctioning instrument cluster can result in erratic readings, causing confusion for the driver and potentially leading to unsafe driving conditions. For example, if the fuel gauge fails, you might run out of fuel unexpectedly. This issue is commonly found in vehicles like the 2015-2018 Ford F-150, where the digital display can become unresponsive. Moreover, if the U0173 code is present, it may indicate deeper electrical issues within the vehicle, such as poor connections or damaged wiring. Addressing this code promptly is crucial to ensure your vehicle operates safely and reliably, as ignoring it could lead to further complications and costly repairs.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0173 is present:

  • The check engine light remains illuminated constantly, indicating a potential issue.
  • The speedometer or tachometer may not function, which can confuse the driver and affect driving performance.
  • Fuel economy might drop significantly, as incorrect data from the PCM can lead to inefficient engine operation.
  • Warning lights for various systems may illuminate unexpectedly, indicating other potential issues.
  • The instrument cluster display may freeze or show incorrect readings, leading to uncertainty while driving.

Possible Causes

Most common causes of U0173 (ordered by frequency):

  1. The most common cause of U0173 is a faulty instrument cluster, which accounts for approximately 60% of cases. This can occur due to electronic failure or internal component issues.
  2. A damaged or corroded wiring harness between the instrument cluster and PCM is another prevalent cause. This can lead to intermittent communication failures, which may worsen over time.
  3. Poor connections or loose wiring can prevent proper data transfer. Regular checks and maintenance of electrical connections can help prevent this issue.
  4. In rare cases, a malfunctioning PCM itself can be the root of the problem, though this is less common. Replacing the PCM is a significant undertaking and should be done with care.
  5. Electrical shorts or grounding issues may also trigger the U0173 code, although these are infrequent causes.

U0173 Repair Costs

Cost Breakdown by Repair Type

Instrument Cluster Replacement

Replacing the faulty instrument cluster with a new or refurbished unit.

  • Total: $300 - $800
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring connections between the PCM and instrument cluster.

  • Total: $100 - $300
  • Success rate: 90%
PCM Replacement

Replacing the powertrain control module if it's found to be faulty.

  • Total: $600 - $1200
  • Success rate: 75%
Money-Saving Tips for U0173
  • 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 U0173 Diagnosis Process

Follow these systematic steps to accurately diagnose U0173. 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: Use the GeekOBD APP to perform an OBD2 scan - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan - 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 the instrument cluster and wiring harness (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the instrument cluster and wiring harness (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 - After repairs, verify proper operation by checking the instrument cluster and clearing codes (10-15 minutes)

Step 4: System function test - After repairs, verify proper operation by checking the instrument cluster and clearing 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 the repair's success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm the repair's success (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: Instrument Cluster Replacement on 2017 Ford F-150

Vehicle: 2017 Ford F-150, 45,000 miles

Problem: Customer reported that the speedometer was not working and the check engine light was on.

Diagnosis: Performed a diagnostic scan using the GeekOBD APP, revealing U0173 along with other codes indicating instrument cluster issues.

Solution: Replaced the faulty instrument cluster. The wiring was checked and found to be in good condition.

Cost: $500 (including parts and labor)

Result: The speedometer and other gauges functioned properly after replacement, and the check engine light was cleared.

Case Study 2: Wiring Repair on 2016 Chevrolet Silverado

Vehicle: 2016 Chevrolet Silverado, 60,000 miles

Problem: Customer experienced intermittent issues with the instrument cluster display freezing.

Diagnosis: Used a multimeter to check for continuity in the wiring between the PCM and the instrument cluster, leading to the discovery of a damaged wire.

Solution: Repaired the damaged wiring and secured all connections.

Cost: $150

Result: Instrument cluster issues resolved, with no further problems reported.

Diagnose U0173

Use GeekOBD APP for professional diagnosis!

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

Code: U0173
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes