C06AC - Understanding Common in 2015-2019 Ford Explorer and F-150

Quick Answer

C06AC means: C06AC indicates a fault in the transmission control system, often related to the transmission fluid temperature sensor.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with C06AC? Immediate attention is recommended to prevent transmission damage.

Common Questions

What does C06AC mean and how does it affect my car?

C06AC signifies an issue with the transmission control system, particularly the temperature sensor. If this code appears, it can lead to poor transmission performance, such as erratic shifting and reduced fuel efficiency, which can worsen over time if not addressed.

What are the most common causes of C06AC and how much does it cost to fix?

The main causes include a faulty temperature sensor, damaged wiring, or low transmission fluid. Repair costs can range from $100 for wiring repairs to $1200 for PCM replacement, depending on the severity of the problem.

Can I drive my car with C06AC or should I stop immediately?

It is not advisable to drive with a C06AC code. Continuing to drive could lead to severe transmission damage, potentially resulting in a breakdown. It’s best to get the issue diagnosed and repaired as soon as possible.

How can I diagnose C06AC myself using GeekOBD APP?

To diagnose C06AC using the GeekOBD APP, connect the app to your vehicle’s OBD2 port, run a complete scan for trouble codes, and review the freeze frame data to understand the operating conditions at the time of the fault.

What vehicles are most commonly affected by C06AC?

C06AC is frequently reported in 2015-2019 Ford Explorer and F-150 models. Owners of these vehicles should be vigilant for signs of transmission issues and consider periodic diagnostics.

How can I prevent C06AC from happening again?

Regular maintenance is key. Ensure your transmission fluid is at the correct level and in good condition, and have your vehicle's electrical system inspected periodically to catch any wiring issues early.

What is C06AC?

The diagnostic trouble code (DTC) C06AC is an indication of a fault in the vehicle's powertrain control module (PCM), specifically related to the transmission control system. This code often surfaces in vehicles like the 2015-2019 Ford Explorer and F-150, which utilize complex electronic systems to manage engine and transmission performance. When C06AC is triggered, it typically suggests issues with the transmission fluid temperature sensor circuit, indicating that the sensor is reading temperatures that are out of range, which can lead to erratic shifting and overall performance degradation. If left unaddressed, this could result in reduced fuel efficiency and potential damage to the transmission, leading to costly repairs. In practical terms, car owners may notice their vehicle hesitating during acceleration or experiencing harsh shifting. Addressing this code promptly can prevent further complications and ensure your vehicle operates smoothly. If you see this code, it’s wise to consult a professional or use diagnostic tools like the GeekOBD APP to further investigate the underlying issues and determine the best course of action.

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

Symptoms

Common symptoms when C06AC is present:

  • The check engine light remains illuminated, indicating a persistent issue.
  • The vehicle experiences a noticeable delay or hesitation during acceleration, which may feel like a loss of power.
  • Fuel economy may decrease significantly, often by 10-15%, due to inefficient transmission operation.
  • Shifting between gears can feel harsh or erratic, potentially causing a jarring experience while driving.
  • In extreme cases, the vehicle may enter a 'limp mode', where performance is severely restricted to prevent damage.

Possible Causes

Most common causes of C06AC (ordered by frequency):

  1. The most common cause is a faulty transmission fluid temperature sensor, which occurs in about 65% of cases. This sensor measures the temperature of the transmission fluid, and if it fails, it can send incorrect signals to the PCM.
  2. Another likely cause is damaged wiring or poor connections within the sensor circuit, which can account for about 20% of the issues. This can occur from wear and tear over time, especially in older vehicles.
  3. A third potential cause includes low transmission fluid levels or contaminated fluid, which can prevent the sensor from operating correctly. Regular maintenance checks can prevent this issue.
  4. Less common but serious is a failing PCM, which can result in multiple DTCs being triggered. If the PCM is malfunctioning, it may not properly interpret data from the sensors.
  5. A rare cause could be a transmission overheating due to other mechanical failures, which can lead to a chain reaction of issues within the transmission system.

C06AC Repair Costs

Cost Breakdown by Repair Type

Transmission Fluid Temperature Sensor Replacement

Replacing the faulty temperature sensor usually resolves the C06AC code.

  • Total: $150 - $300
  • Success rate: 85%
Wiring Repair

Repairing damaged wiring or connections in the sensor circuit.

  • Total: $100 - $200
  • Success rate: 75%
PCM Replacement

In cases where the PCM is faulty, replacing it may be necessary.

  • Total: $600 - $1200
  • Success rate: 60%
Money-Saving Tips for C06AC
  • 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 C06AC Diagnosis Process

Follow these systematic steps to accurately diagnose C06AC. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs of damage, such as frayed wiring, loose connections, or corrosion that could affect the sensor circuit (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs of damage, such as frayed wiring, loose connections, or corrosion that could affect the sensor circuit (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 - Use the GeekOBD APP to retrieve all trouble codes and freeze frame data to understand the context of the fault (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD APP to retrieve all trouble codes and freeze frame data to understand the context of the fault (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 to test the voltage and resistance of the transmission fluid temperature sensor (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the voltage and resistance of the transmission fluid temperature sensor (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 - After repairs, verify the operation of the transmission and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - After repairs, verify the operation of the transmission and clear codes using 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 the vehicle under various conditions to confirm that the repair was successful and the symptoms have resolved (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the repair was successful and the symptoms have resolved (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: Transmission Temperature Sensor Replacement in a 2017 Ford F-150

Vehicle: 2017 Ford F-150, 45,000 miles

Problem: Customer reported check engine light and harsh shifting.

Diagnosis: OBD2 scan revealed C06AC. Visual inspection showed a faulty temperature sensor.

Solution: Replaced the temperature sensor and topped off the transmission fluid.

Cost: $250 (including parts and labor)

Result: Customer reported smooth shifting and no further issues.

Case Study 2: Wiring Repair for C06AC in a 2016 Ford Explorer

Vehicle: 2016 Ford Explorer, 60,000 miles

Problem: Vehicle experienced delays in shifting and check engine light was on.

Diagnosis: Diagnostics revealed C06AC due to damaged wiring in the sensor circuit.

Solution: Repaired the damaged wiring and secured all connections.

Cost: $180 (including labor)

Result: Issue resolved, with no further symptoms detected.

Diagnose C06AC

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: C06AC
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes