P086F - Transmission Fluid Pressure Sensor Circuit Range/Performance Problem in Ford, GM, and Chrysler Vehicles

Quick Answer

P086F means: P086F indicates a problem with the transmission fluid pressure sensor or circuit.

Fix: Check and replace faulty components Cost: $200 - $500 Time: 90-180 minutes

Can I drive with P086F? Immediate attention is recommended to prevent further transmission damage.

Common Questions

What does P086F mean and how does it affect my car?

The P086F code indicates a problem with the transmission fluid pressure sensor, affecting how your vehicle shifts gears. If ignored, it can lead to transmission failure, making it crucial to address the issue promptly.

What are the most common causes of P086F and how much does it cost to fix?

Common causes include a faulty transmission fluid pressure sensor and low transmission fluid levels. Repairs can range from $200 to $500, depending on the specific issue.

Can I drive my car with P086F or should I stop immediately?

While you may be able to drive short distances, it’s not advisable to ignore the P086F code as it can lead to severe transmission damage. It's best to get your vehicle inspected immediately.

How can I diagnose P086F myself using GeekOBD APP?

Using the GeekOBD APP, scan for DTCs, view freeze frame data, and check live data to understand the sensor's behavior. Look for any anomalies in the pressure readings that could indicate a faulty sensor.

What vehicles are most commonly affected by P086F?

Vehicles from Ford, GM, and Chrysler from 2015 to 2020 frequently experience the P086F code. Always check for any recalls or Technical Service Bulletins (TSBs) related to your model.

How can I prevent P086F from happening again?

Regular maintenance, such as checking fluid levels and replacing the transmission fluid according to your owner's manual, can help prevent P086F and ensure your vehicle runs smoothly.

What is P086F?

The P086F Diagnostic Trouble Code (DTC) indicates a problem with the transmission fluid pressure sensor or its circuit. This code is commonly found in various vehicles, particularly those from Ford, General Motors, and Chrysler, manufactured between 2015 and 2020. The transmission fluid pressure sensor monitors the hydraulic pressure within the transmission system, providing crucial information to the engine control module (ECM) for optimal shifting and performance. When the ECM detects that the sensor's readings are outside the expected range, it triggers the P086F code. Drivers may experience a range of issues, including erratic gear shifting, reduced acceleration, or even complete transmission failure if left unaddressed. Ignoring this code can lead to more severe transmission issues, resulting in costly repairs. Therefore, if you're experiencing symptoms associated with P086F, it's essential to diagnose and rectify the problem promptly to ensure the reliability and longevity of your vehicle's transmission system.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P086F is present:

  • Check engine light illuminates and stays on, indicating an ongoing issue with the transmission system.
  • Engine exhibits hesitation during acceleration, making it difficult to maintain speed or shift smoothly.
  • Fuel economy decreases by 10-15%, leading to more frequent visits to the gas station.
  • Transmission may slip or fail to engage in the correct gear, causing unpredictable driving behavior.
  • Unusual noises or grinding sounds may occur when the vehicle attempts to shift gears.

Possible Causes

Most common causes of P086F (ordered by frequency):

  1. The most common cause of P086F is a faulty transmission fluid pressure sensor, which has a likelihood of about 60%. This sensor may fail due to wear and tear, exposure to heat, or electrical issues.
  2. Another frequent cause is low transmission fluid levels, potentially due to leaks or poor maintenance practices. Ensuring proper fluid levels is crucial for optimal transmission function.
  3. Wiring issues in the sensor circuit, such as frayed wires or bad connections, can also trigger this code. Regular inspections can help prevent these problems.
  4. Less common but serious causes include internal transmission damage, such as a failing oil pump, which can lead to catastrophic transmission failure if not addressed.
  5. In rare cases, a malfunctioning ECM may misinterpret sensor data, leading to a false reading and triggering the P086F code.

P086F Repair Costs

Cost Breakdown by Repair Type

Transmission Fluid Pressure Sensor Replacement

Replacing the faulty transmission fluid pressure sensor to restore proper function.

  • Total: $200 - $500
  • Success rate: 85%
Transmission Fluid Flush

Flushing old transmission fluid and replacing it to ensure proper lubrication.

  • Total: $150 - $300
  • Success rate: 70%
Money-Saving Tips for P086F
  • 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 P086F Diagnosis Process

Follow these systematic steps to accurately diagnose P086F. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Start by checking for obvious signs like damaged wiring, loose connections, or corrosion around the transmission fluid pressure sensor (5-10 minutes)

Step 1: Initial visual inspection - Start by checking for obvious signs like damaged wiring, loose connections, or corrosion around the transmission fluid pressure sensor (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 diagnostic trouble codes and freeze frame data for context on the P086F code (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD APP to retrieve all diagnostic trouble codes and freeze frame data for context on the P086F code (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 - Utilize a multimeter to measure the voltage and resistance of the transmission fluid pressure sensor to verify its functionality (20-30 minutes)

Step 3: Component testing - Utilize a multimeter to measure the voltage and resistance of the transmission fluid pressure sensor to verify its functionality (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 - Once repairs are made, perform a function test to ensure the sensor operates correctly before clearing the codes (10-15 minutes)

Step 4: System function test - Once repairs are made, perform a function test to ensure the sensor operates correctly before clearing the codes (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 resolved the issue and that no new codes appear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the repair resolved the issue and that no new codes appear (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 Fluid Pressure Sensor Replacement in a 2017 Ford Fusion

Vehicle: 2017 Ford Fusion with 85,000 miles

Problem: Customer reported check engine light on and erratic shifting behavior.

Diagnosis: OBD2 scan revealed P086F code. Visual inspection showed corrosion on the sensor wiring, confirmed with multimeter testing.

Solution: Replaced the transmission fluid pressure sensor and repaired the wiring. Performed fluid flush for optimal performance.

Cost: $450 (sensor $200, labor $250)

Result: Customer reported smooth shifting and no further issues after the repair.

Case Study 2: Transmission Fluid Flush in a 2019 Chevrolet Malibu

Vehicle: 2019 Chevrolet Malibu with 40,000 miles

Problem: Customer experienced decreased fuel economy and transmission slipping.

Diagnosis: P086F code confirmed via OBD2 scan. Low fluid levels and dirty transmission fluid were identified as contributing factors.

Solution: Performed a complete transmission fluid flush and replaced the fluid with OEM specifications.

Cost: $200 (fluid $100, labor $100)

Result: Fuel economy improved by 15% and no slipping was reported post-service.

Diagnose P086F

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: P086F
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes