U0170 - Understanding DTC U0170: A Complete Guide for 2015-2019 Chevrolet Equinox Owners

Quick Answer

U0170 means: U0170 indicates a communication issue between the Engine Control Module and the Body Control Module.

Fix: Check and replace faulty components Cost: $100 - $300 Time: 90-180 minutes

Can I drive with U0170? Immediate attention is recommended to avoid further electrical issues.

Common Questions

What does U0170 mean and how does it affect my car?

The U0170 code indicates that there is a communication breakdown between the Engine Control Module and the Body Control Module. This can lead to various electrical issues, such as failure of power windows, inoperative lights, or even starting problems. If ignored, it could escalate to more significant electrical malfunctions, affecting your vehicle's reliability and safety.

What are the most common causes of U0170 and how much does it cost to fix?

Common causes include damaged wiring (60%), a faulty Body Control Module (25%), and battery issues (15%). Repair costs can range from $100 for wiring repairs to $800 for BCM replacement, depending on the specific issue diagnosed.

Can I drive my car with U0170 or should I stop immediately?

It's advisable to stop driving your vehicle if you see the U0170 code, as it may lead to safety-related failures. Continued operation could exacerbate the problem, leading to more expensive repairs down the line.

How can I diagnose U0170 myself using GeekOBD APP?

With the GeekOBD APP, you can perform a complete OBD2 scan to retrieve the U0170 code along with any other related codes. The app can also provide freeze frame data, helping you understand the conditions under which the code was triggered, guiding your troubleshooting efforts.

What vehicles are most commonly affected by U0170?

The U0170 code is commonly seen in models such as the 2015-2019 Chevrolet Equinox and 2016-2018 GMC Terrain. Always check for any recalls or Technical Service Bulletins (TSBs) related to your specific model.

How can I prevent U0170 from happening again?

Regular maintenance is key. Keep your vehicle's electrical system in check by inspecting wiring and connectors during routine service. Also, ensure your battery is in good condition and replace it as necessary to prevent communication issues.

What is U0170?

The diagnostic trouble code (DTC) U0170 refers to "Lost Communication with Body Control Module (BCM)". This code indicates that the Engine Control Module (ECM) is unable to communicate with the Body Control Module, which is crucial for various electrical functions in your vehicle. When this code appears, it means that your car's systems that are controlled by the BCM, such as the power door locks, interior lighting, and sometimes the anti-theft system, may not function properly. The U0170 code can manifest in various ways, potentially leading to issues such as non-functional power windows, inoperative door locks, or failure of the vehicle to start. For car owners, this can be a frustrating experience because it can lead to further complications if left unresolved. Addressing this code promptly is important to maintain the vehicle's overall functionality and safety. The issue could stem from simple wiring problems, such as corroded connectors, to more complex issues like a faulty BCM itself. Understanding the symptoms, causes, and solutions for U0170 can help you take actionable steps to rectify the situation, ensuring your vehicle remains reliable and safe on the road.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0170 is present:

  • Check engine light stays on constantly, indicating a persistent issue with vehicle communication.
  • Power windows may fail to operate, leaving the driver unable to adjust window positions as needed.
  • Interior lights may not activate or stay on, affecting visibility and convenience when entering or exiting the vehicle.
  • Vehicle may fail to start intermittently, leading to frustration and potential safety concerns.
  • Anti-theft system may trigger unexpectedly, causing the vehicle to lock down and preventing operation.

Possible Causes

Most common causes of U0170 (ordered by frequency):

  1. The most common cause is damaged or corroded wiring, which has a 60% likelihood. A visual inspection can often reveal these problems.
  2. A faulty Body Control Module itself is the second most common cause, with a 25% occurrence rate. Testing the BCM with a multimeter is essential to confirm its functionality.
  3. A third cause could be a weak battery or poor battery connections, which can cause electrical communication issues. Regular battery maintenance can help prevent this.
  4. Less common but serious causes include water intrusion into the BCM, which can lead to complete module failure.
  5. A rare but possible cause is a software glitch in the BCM, requiring a software update from a dealership or qualified technician.

U0170 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing or replacing corroded wiring and connectors related to the BCM.

  • Total: $100 - $300
  • Success rate: 80%
BCM Replacement

Replacing the Body Control Module if it's determined to be faulty.

  • Total: $400 - $800
  • Success rate: 90%
Battery Service

Addressing battery issues that might contribute to U0170.

  • Total: $50 - $150
  • Success rate: 70%
Money-Saving Tips for U0170
  • 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 U0170 Diagnosis Process

Follow these systematic steps to accurately diagnose U0170. 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, especially the BCM and connections (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, especially the BCM and connections (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 with the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes with the GeekOBD APP (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 vehicle under various conditions to confirm repair success and that the U0170 code does not return (15-20 minutes)

Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success and that the U0170 code does not return (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 U0170 in a 2017 Chevrolet Equinox

Vehicle: 2017 Chevrolet Equinox, 40,000 miles

Problem: The customer reported that the power windows and interior lights were malfunctioning.

Diagnosis: After scanning with the GeekOBD APP, the U0170 code was confirmed. A visual inspection revealed corroded wiring near the BCM.

Solution: The technician repaired the damaged wiring and cleaned the connectors, restoring communication between the modules.

Cost: $250 (including labor and materials)

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

Case Study 2: BCM Replacement for U0170 in a 2016 GMC Terrain

Vehicle: 2016 GMC Terrain, 55,000 miles

Problem: The vehicle would not start intermittently, and the check engine light was on.

Diagnosis: Diagnostic tests pointed to a faulty BCM after confirming U0170. The BCM was unresponsive during testing.

Solution: The technician replaced the BCM, reprogrammed it, and ensured all connections were secure.

Cost: $600 (including parts and labor)

Result: The vehicle started reliably, and all electrical functions were restored.

Diagnose U0170

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: U0170
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes