Quick Answer
U0133 means: U0133 indicates a communication breakdown between the Powertrain Control Module and other control units.
Can I drive with U0133? Immediate attention is recommended to avoid further complications.
Common Questions
What does U0133 mean and how does it affect my car?
U0133 indicates a communication error between your car's Powertrain Control Module and other control units. This can lead to performance issues, such as engine hesitation, stalling, or even complete shutdowns. Addressing this code promptly is essential for maintaining vehicle reliability.
What are the most common causes of U0133 and how much does it cost to fix?
Common causes include damaged wiring and connectors, malfunctioning control modules, or poor electrical connections. Repair costs can range from $150 for wiring repairs to over $1200 for PCM replacements, depending on the severity of the issue.
Can I drive my car with U0133 or should I stop immediately?
While it may be possible to drive a short distance, it's not advisable. Ignoring U0133 can lead to serious safety issues, such as stalling or loss of control. It's best to have it diagnosed as soon as possible.
How can I diagnose U0133 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan for DTCs, view freeze frame data, and monitor live sensor data. By examining these parameters, you can identify potential issues related to the U0133 code.
What vehicles are most commonly affected by U0133?
Commonly affected vehicles include the 2012-2015 Ford Focus, as well as some models from Chrysler and Honda during the same years. Always check for any recalls or Technical Service Bulletins (TSBs) related to communication issues.
How can I prevent U0133 from happening again?
Regular maintenance, including checking wiring and connections, keeping the vehicle clean and free of corrosion, and ensuring software is updated can help prevent U0133 from occurring in the future.
What is U0133?
The diagnostic trouble code (DTC) U0133 signifies a communication failure between the vehicle's various control modules, specifically indicating that the Powertrain Control Module (PCM) is not communicating with other modules. This issue can arise in several vehicles, particularly models like the 2012 to 2015 Ford Focus, where electronic components are heavily reliant on effective communication networks. When the PCM fails to relay information to other critical systems—like the transmission control module (TCM) or the engine control module (ECM)—it can lead to a variety of performance issues. Drivers may experience symptoms like a check engine light, unexpected engine performance drops, or even complete engine shutdown in severe cases. The implications of ignoring this code can be significant, potentially leading to drivability issues and increased repair costs down the line. Therefore, it's crucial to address the U0133 code promptly, as it can evolve into more complex problems if left unresolved, affecting the overall safety and reliability of your vehicle.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0133 is present:
- The check engine light illuminates and stays on constantly, indicating a potential issue with vehicle communication.
- Drivers may notice the engine hesitating during acceleration, leading to a lack of power and responsiveness.
- Fuel economy may decrease by 10-15%, as the engine struggles to perform optimally due to communication issues.
- Unexpected stalling or engine shutdowns can occur, particularly during idling or low-speed maneuvers.
- In severe cases, the vehicle may enter 'limp mode,' limiting speed and functionality to prevent further damage.
Possible Causes
Most common causes of U0133 (ordered by frequency):
- The most common cause is damaged wiring or connectors, with a likelihood of about 60%. These can be caused by wear and tear, exposure to moisture, or even rodent damage.
- A malfunctioning PCM or other control modules can account for approximately 25% of issues. This can occur due to software glitches or internal failures.
- Poor grounds or electrical connections can lead to intermittent communication failures, making up about 10% of cases. Regularly checking connectors and grounds can prevent this.
- Less common but serious causes include corrosion in the communication lines, which can significantly disrupt data flow.
- Rarely, it could be due to a failed sensor that the PCM relies upon, resulting in communication errors.
U0133 Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repair or replace damaged wiring and connectors related to the PCM.
- Total: $150 - $400
- Success rate: 80%
PCM Replacement
Replace faulty PCM with a new or refurbished unit if the current PCM is beyond repair.
- Total: $600 - $1200
- Success rate: 90%
Sensor Replacement
Replace any faulty sensors that are causing communication failures.
- Total: $100 - $500
- Success rate: 75%
Money-Saving Tips for U0133
- 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 U0133 Diagnosis Process
Follow these systematic steps to accurately diagnose U0133. 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 to test suspected components and their connections for continuity and resistance (20-30 minutes)
Step 3: Component testing - Use a multimeter to test suspected components and their connections for continuity and resistance (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes to see if they return (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes to see if they return (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any reoccurrence of codes (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any reoccurrence of codes (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: 2015 Ford Focus - Communication Breakdown
Vehicle: 2015 Ford Focus, 60,000 miles
Problem: Customer reported check engine light and engine hesitation during acceleration.
Diagnosis: Performed an OBD2 scan, revealing U0133. Found damaged wiring harness near the PCM.
Solution: Repaired the wiring harness and replaced corroded connectors.
Cost: $350
Result: Check engine light cleared, and the vehicle performed smoothly after repairs.
Case Study 2: 2013 Honda Civic - PCM Replacement
Vehicle: 2013 Honda Civic, 75,000 miles
Problem: Vehicle stalled unexpectedly with a check engine light on.
Diagnosis: Scanned for DTCs and confirmed U0133. PCM was not communicating with other control units.
Solution: Replaced the PCM with a new unit.
Cost: $950
Result: Vehicle operated without issues post-repair.