Quick Answer
U0847 means: U0847 indicates a communication issue between the steering angle sensor and the vehicle's PCM.
Can I drive with U0847? Immediate attention is recommended to ensure vehicle safety and performance.
Common Questions
What does U0847 mean and how does it affect my car?
The U0847 code indicates a problem with the communication between your vehicle's control modules, particularly the steering angle sensor. This can affect your vehicle's stability and handling, potentially leading to unsafe driving conditions.
What are the most common causes of U0847 and how much does it cost to fix?
Common causes include a faulty steering angle sensor, wiring issues, and software glitches. Repair costs can range from $100 for wiring repairs to $300 for sensor replacement, depending on the specific issue.
Can I drive my car with U0847 or should I stop immediately?
It is not advisable to drive your vehicle with the U0847 code present, as it may compromise your steering and stability control systems, which are essential for safe operation.
How can I diagnose U0847 myself using GeekOBD APP?
Utilize the GeekOBD APP to scan your vehicle's OBD2 system, retrieve the U0847 code and other related codes, and analyze freeze frame data to understand the issue's context.
What vehicles are most commonly affected by U0847?
The U0847 code is frequently seen in 2015-2019 Chevrolet Silverado trucks and other GM models that utilize similar electronic control systems.
How can I prevent U0847 from happening again?
Regularly inspect your vehicle’s wiring and connectors for damage, keep the software updated, and avoid harsh driving conditions that could affect your steering components.
What is U0847?
The U0847 diagnostic trouble code (DTC) indicates a communication issue between the vehicle's control modules, specifically relating to the steering angle sensor. This sensor is crucial for stability control and advanced driver-assistance systems (ADAS). When the U0847 code is triggered, it signals that the powertrain control module (PCM) is not receiving valid data from the steering angle sensor, which can lead to various performance issues. In practical terms, this can affect your vehicle's handling, stability, and safety features, especially in vehicles equipped with electronic stability control. Commonly seen in 2015 to 2019 Chevrolet Silverado and similar models from GM, this code can lead to the illumination of the check engine light and may cause additional DTCs to appear. If left unresolved, it may result in impaired vehicle performance or safety concerns, especially in adverse driving conditions. Ignoring this code may not only lead to further complications but could also potentially endanger the safety of the vehicle's occupants. Therefore, understanding and addressing the U0847 code is essential for maintaining optimal vehicle function and safety.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0847 is present:
- The check engine light illuminates and remains on, indicating a fault in the vehicle's electronic systems.
- The steering feels unresponsive or loose, making it difficult to maintain control during turns or when driving straight.
- A noticeable decline in fuel economy, potentially dropping by 10-15%, due to inefficient driving conditions caused by faulty sensors.
- Traction control or stability control warnings may appear on the dashboard, indicating that these systems are compromised.
- The vehicle may exhibit erratic behavior, such as unexpected steering inputs or difficulty in maneuvering during low-speed conditions.
Possible Causes
Most common causes of U0847 (ordered by frequency):
- The most common cause is a faulty steering angle sensor, with a likelihood of around 70%. This sensor can wear out over time due to exposure to contaminants and harsh driving conditions.
- A wiring issue, such as damaged or corroded connectors between the sensor and the PCM, can account for about 20% of cases. These issues often arise from road debris or exposure to moisture.
- Software glitches in the vehicle's control modules can also trigger the U0847 code. Keeping the vehicle's software updated can help prevent this issue.
- Less common but serious causes include a malfunctioning powertrain control module, which could fail to process data correctly, affecting the entire vehicle's performance.
- Rarely, incorrect installation of aftermarket modifications, such as steering wheel controls, may lead to the U0847 code, disrupting the communication between modules.
U0847 Repair Costs
Cost Breakdown by Repair Type
Steering Angle Sensor Replacement
Replacing the faulty steering angle sensor with an OEM part to restore functionality.
- Total: $150 - $300
- Success rate: 95%
Wiring Repair
Fixing damaged wiring or connectors, which may involve soldering or replacing affected parts.
- Total: $100 - $200
- Success rate: 85%
Control Module Reprogramming
Reprogramming the PCM when software issues are detected, which may require dealer-level access.
- Total: $50 - $150
- Success rate: 75%
Money-Saving Tips for U0847
- 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 U0847 Diagnosis Process
Follow these systematic steps to accurately diagnose U0847. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Begin with a thorough visual inspection of the steering column and wiring harness for any signs of damage, loose connections, or corrosion
Step 1: Begin with a thorough visual inspection of the steering column and wiring harness for any signs of damage, loose connections, or corrosion. This should take about 5-10 minutes.
Step 2: Step 2: Use the GeekOBD APP to conduct an OBD2 scan
Step 2: Use the GeekOBD APP to conduct an OBD2 scan. Retrieve all stored codes and freeze frame data to gather context around the U0847 code. This process typically takes 10-15 minutes.
Step 3: Step 3: Perform component testing on the steering angle sensor using a multimeter to check for proper voltage and resistance
Step 3: Perform component testing on the steering angle sensor using a multimeter to check for proper voltage and resistance. This may take 20-30 minutes depending on the findings.
Step 4: Step 4: After repairs, conduct a system function test to ensure that the steering angle sensor is providing accurate data to the PCM and clear the codes
Step 4: After repairs, conduct a system function test to ensure that the steering angle sensor is providing accurate data to the PCM and clear the codes. This step should take about 10-15 minutes.
Step 5: Step 5: Finally, take the vehicle for a road test under various driving conditions to confirm the repair was successful and that no codes reappear
Step 5: Finally, take the vehicle for a road test under various driving conditions to confirm the repair was successful and that no codes reappear. This could take 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: Steering Angle Sensor Replacement on 2017 Chevrolet Silverado
Vehicle: 2017 Chevrolet Silverado, 75,000 miles
Problem: Customer reported a persistent check engine light and unstable steering feel.
Diagnosis: Diagnostic scan revealed U0847 code along with the steering angle sensor fault.
Solution: Replaced the steering angle sensor, which restored proper communication with the PCM.
Cost: $250 (including parts and labor)
Result: After the repair, the check engine light was cleared, and the vehicle handled normally.
Case Study 2: Wiring Repair on 2016 GMC Sierra
Vehicle: 2016 GMC Sierra, 60,000 miles
Problem: Customer experienced traction control warnings and check engine light illumination.
Diagnosis: Found damaged wiring connecting the steering angle sensor to the PCM.
Solution: Repaired the wiring harness and re-secured connections.
Cost: $150 (labor and materials included)
Result: Post-repair, the warning lights were cleared, and the vehicle operated without issues.