Quick Answer
U0973 means: U0973 indicates a communication failure between control modules in your vehicle's network.
Can I drive with U0973? Immediate attention is advised to prevent further vehicle malfunctions.
Common Questions
What does U0973 mean and how does it affect my car?
U0973 indicates a communication fault between your vehicle's electronic control units. This can affect engine performance, transmission shifting, and other critical systems. Ignoring this code might lead to increased repair costs if the issue worsens.
What are the most common causes of U0973 and how much does it cost to fix?
Common causes include damaged wiring (60% likelihood), corrupted software, or a faulty control module. Repair costs can range from $150 for minor wiring repairs to $800 for a complete module replacement.
Can I drive my car with U0973 or should I stop immediately?
Driving with U0973 is not advisable as it can lead to more severe malfunctions. It's best to have the vehicle inspected as soon as possible to avoid safety risks.
How can I diagnose U0973 myself using GeekOBD APP?
Using the GeekOBD APP, connect your OBD2 scanner, retrieve the DTCs, and check the freeze frame data for context. Look for any patterns that could indicate wiring issues or module faults.
What vehicles are most commonly affected by U0973?
U0973 is frequently seen in 2015-2020 Ford F-150 and Chevrolet Silverado models, though it can affect various vehicles with complex electronic systems.
How can I prevent U0973 from happening again?
Regular maintenance, including checking wiring for wear and ensuring software is up to date, can help prevent issues that lead to U0973.
What is U0973?
The diagnostic trouble code (DTC) U0973 refers to a communication issue between the vehicle's control modules, specifically indicating a fault in the communication line of the vehicle's data network. This code is often associated with a loss of communication with various modules, such as the powertrain control module (PCM) or the body control module (BCM). When U0973 is triggered, it typically means that the vehicle's onboard computer is unable to receive or send necessary data to these modules. This can lead to various operational issues, including problems with engine performance, transmission behavior, and even safety features like anti-lock brakes or traction control. In practical terms, car owners may notice symptoms like a persistent check engine light, erratic behavior in power accessories, or even stalling. Addressing this code promptly is crucial, as ignoring it may lead to more severe vehicle malfunctions. Regular diagnostics using tools like the GeekOBD APP can help in pinpointing the issue early on, saving on costly repairs down the line.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0973 is present:
- The check engine light stays on constantly, indicating a fault detected in the control systems.
- Engine performance issues such as hesitation during acceleration or unresponsive throttle.
- Fuel economy decreased by 10-15%, leading to more frequent visits to the gas station.
- Erratic behavior of dashboard indicators, causing warning lights to illuminate randomly.
- Inconsistent operation of power accessories like windows or locks, often failing to respond.
Possible Causes
Most common causes of U0973 (ordered by frequency):
- Loose or damaged wiring and connectors (60% likelihood) - This is the most common cause of U0973, often due to wear and tear or exposure to the elements.
- Corrupted software in the control modules - As vehicles become more software-dependent, outdated or corrupted software can cause communication issues.
- Faulty control module - A failing module that cannot process incoming or outgoing signals could trigger this code.
- Issues with the vehicle's data bus system - Problems in the bus can lead to intermittent communication failures between modules.
- Rarely, a manufacturing defect in one of the control modules may cause this issue.
U0973 Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repair or replacement of damaged wiring and connectors.
- Total: $150 - $300
- Success rate: 85%
Control Module Reprogramming
Reprogramming or updating control module software to restore communication.
- Total: $100 - $250
- Success rate: 75%
Control Module Replacement
Replacing a failed control module that has been diagnosed as faulty.
- Total: $300 - $800
- Success rate: 90%
Money-Saving Tips for U0973
- 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 U0973 Diagnosis Process
Follow these systematic steps to accurately diagnose U0973. 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).
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).
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components (20-30 minutes).
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).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes).
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: Wiring Repair on a 2018 Ford F-150
Vehicle: 2018 Ford F-150, 45,000 miles
Problem: Customer reported check engine light on and erratic dashboard behavior.
Diagnosis: After scanning with GeekOBD APP, U0973 was retrieved. Visual inspection revealed a frayed wire in the harness.
Solution: Repaired damaged wiring and cleared the code.
Cost: $180 (includes parts and labor)
Result: Customer reported normal operation and no recurrence of the code.
Case Study 2: Control Module Update on a 2019 Chevrolet Silverado
Vehicle: 2019 Chevrolet Silverado, 30,000 miles
Problem: Vehicle stalling intermittently with multiple warning lights on dashboard.
Diagnosis: OBD scan showed U0973. Software in the control module was outdated.
Solution: Reprogrammed the control module with the latest software update.
Cost: $200 (labor included)
Result: Vehicle performance returned to normal with no further issues.