C0D71 - Understanding the Common Diagnostic Trouble Code in 2016-2020 Ford Explorer and Escape

Quick Answer

C0D71 means: C0D71 refers to a communication issue in the vehicle's PCM or TCM.

Fix: Check and replace faulty components Cost: $800 - $1,500 Time: 90-180 minutes

Can I drive with C0D71? Immediate attention is recommended to prevent further complications.

Common Questions

What does C0D71 mean and how does it affect my car?

C0D71 indicates a communication fault between the vehicle's control modules, particularly the PCM and TCM. This can lead to poor performance, erratic shifting, and even increase the risk of transmission failure if not addressed promptly. Ignoring this code can lead to further complications, affecting vehicle safety and drivability.

What are the most common causes of C0D71 and how much does it cost to fix?

Common causes of C0D71 include a faulty PCM or TCM, corroded wiring, and loose connectors. Repair costs can vary widely, with PCM replacement ranging from $800 to $1,500, while wiring repairs might cost between $200 and $500. Software updates could be the least expensive option, ranging from $100 to $300.

Can I drive my car with C0D71 or should I stop immediately?

It's advisable to refrain from driving your vehicle if the C0D71 code is present. Continuing to drive may worsen the underlying issue and lead to more significant repairs. It's best to have your car inspected as soon as possible to prevent any further damage.

How can I diagnose C0D71 myself using GeekOBD APP?

To diagnose C0D71 using the GeekOBD APP, first connect the app to your vehicle's OBD-II port and perform a scan. Look for the C0D71 code in the results, then check the freeze frame data for additional context. Follow the diagnostic steps outlined in the app to identify potential issues related to the code.

What vehicles are most commonly affected by C0D71?

C0D71 is frequently seen in 2016-2020 Ford Explorer and Ford Escape models. These vehicles may experience communication issues between the PCM and TCM, so it's essential for owners of these models to stay vigilant for symptoms.

How can I prevent C0D71 from happening again?

Regular vehicle maintenance, including battery checks, wiring inspections, and software updates, can help prevent C0D71. Additionally, addressing any signs of electrical issues promptly will minimize the risk of communication faults.

What is C0D71?

The diagnostic trouble code (DTC) C0D71 indicates a communication fault within the vehicle's powertrain control module (PCM) or transmission control module (TCM). This code is particularly relevant for certain models of Ford vehicles, such as the 2016-2020 Ford Explorer and Ford Escape. When the PCM detects an issue in its communication with other modules, it triggers the C0D71 code. This can lead to various performance issues, including poor engine performance, erratic shifting, and potentially increased fuel consumption. It's crucial to address this code promptly, as ignoring it may lead to more severe problems down the line, such as transmission failure or reduced vehicle safety. Drivers may first notice symptoms like the check engine light illuminating, accompanied by unusual behaviors from the vehicle, such as delayed acceleration or unexpected gear shifts. To ensure optimal performance and avoid costly repairs, it’s advisable to have the vehicle diagnosed and repaired by a certified technician. They will use specialized tools, such as the GeekOBD APP, to read codes and analyze data to pinpoint the exact cause of the C0D71 code.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C0D71 is present:

  • Check engine light stays on constantly, indicating a communication error that needs immediate attention.
  • Engine hesitates during acceleration, causing a sluggish response that can be frustrating for drivers.
  • Transmission shifts erratically, leading to unexpected gear changes that may affect drivability and safety.
  • Decreased fuel economy by 10-15%, resulting in more frequent trips to the gas station.
  • Unusual noises from the transmission, such as grinding or whining, suggesting underlying mechanical issues.

Possible Causes

Most common causes of C0D71 (ordered by frequency):

  1. The most common cause is a faulty PCM or TCM, which accounts for about 60% of cases. This can happen due to software glitches or hardware failures.
  2. Corroded or damaged wiring harnesses are the second most common cause, leading to poor electrical connections that disrupt communication between modules.
  3. Loose connectors or terminals can also trigger C0D71, making up about 15% of cases. Regular inspections can help prevent this issue.
  4. Less common but serious causes include internal transmission failures, which may require extensive repairs or replacement.
  5. Rarely, issues with the vehicle’s battery or alternator can cause voltage inconsistencies that lead to C0D71.

C0D71 Repair Costs

Cost Breakdown by Repair Type

PCM Replacement

Replacing the faulty powertrain control module.

  • Total: $800 - $1,500
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring harnesses.

  • Total: $200 - $500
  • Success rate: 85%
Software Update

Updating the PCM or TCM software to fix communication issues.

  • Total: $100 - $300
  • Success rate: 70%
Money-Saving Tips for C0D71
  • 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 C0D71 Diagnosis Process

Follow these systematic steps to accurately diagnose C0D71. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs of damaged wiring, loose connections, or corrosion

Step 1: Initial visual inspection - Check for obvious signs of damaged wiring, loose connections, or corrosion. This should take about 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, which may take 10-15 minutes

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, which may take 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, which can take 20-30 minutes

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, which can take 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, expected to take around 10-15 minutes

Step 4: System function test - Verify proper operation after repairs and clear codes, expected to take around 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 repair success, typically lasting 15-20 minutes

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success, typically lasting 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: 2018 Ford Explorer C0D71 Diagnosis and Repair

Vehicle: 2018 Ford Explorer, 45,000 miles

Problem: Customer reported check engine light and poor acceleration.

Diagnosis: Using the GeekOBD APP, the technician retrieved the C0D71 code along with freeze frame data indicating erratic transmission shifts.

Solution: Replaced the faulty PCM and updated the software, restoring proper communication.

Cost: $1,200 (including parts and labor)

Result: The vehicle performed normally after the repair, with no further issues reported.

Case Study 2: 2017 Ford Escape Wiring Repair for C0D71

Vehicle: 2017 Ford Escape, 60,000 miles

Problem: Customer noticed the check engine light and decreased fuel efficiency.

Diagnosis: The technician found corroded wiring in the harness, causing communication issues.

Solution: Repaired the damaged wiring and secured connections, resolving the code.

Cost: $300 (parts and labor)

Result: Post-repair, the vehicle's fuel economy returned to normal, and the check engine light remained off.

Diagnose C0D71

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: C0D71
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes