P071A - Understanding DTC P071A: A Guide for 2015-2020 Ford F-150 and Other Affected Models

Quick Answer

P071A means: P071A indicates a fault in the transmission fluid temperature sensor circuit, affecting transmission performance.

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

Can I drive with P071A? Immediate attention is recommended to prevent further transmission damage.

Common Questions

What does P071A mean and how does it affect my car?

P071A indicates an issue with the transmission fluid temperature sensor. This can lead to improper shifting, reduced performance, and potential transmission damage if not addressed. You'll want to resolve this quickly to prevent further complications.

What are the most common causes of P071A and how much does it cost to fix?

Common causes include a faulty temperature sensor, wiring issues, or low transmission fluid levels. Fixing the sensor can range from $150-$300, while wiring repairs can cost between $100-$250. Regular maintenance can help avoid these issues.

Can I drive my car with P071A or should I stop immediately?

It is not advisable to drive your vehicle with a P071A code as it may lead to serious transmission damage. If you experience symptoms like slipping or overheating, it's best to stop driving until the issue is diagnosed and repaired.

How can I diagnose P071A myself using GeekOBD APP?

Download the GeekOBD APP and connect it to your vehicle's OBD2 port. Use the app to scan for trouble codes and view freeze frame data. This information helps you understand the context of the P071A code and can guide your next steps.

What vehicles are most commonly affected by P071A?

P071A is notably common in 2015-2020 Ford F-150 models. Other vehicles like Chevrolet Silverado and Ram trucks may also experience this issue. Always check for any manufacturer recalls or Technical Service Bulletins related to transmission problems.

How can I prevent P071A from happening again?

Regular maintenance is key. Ensure timely fluid changes and check for any leaks or wear in the transmission system. Using high-quality transmission fluid and keeping an eye on the temperature gauge can help prevent future occurrences of P071A.

What is P071A?

The diagnostic trouble code (DTC) P071A refers to a problem with the transmission fluid temperature sensor circuit range/performance. This code typically indicates that the Engine Control Module (ECM) has detected a fault in the signal from the transmission fluid temperature sensor, which plays a critical role in ensuring optimal operation of the transmission system. When the transmission fluid overheats, it can lead to significant transmission damage over time, affecting vehicle performance and drivability. The transmission fluid temperature sensor monitors the temperature of the transmission fluid, and if the readings are outside the expected range, it can trigger the P071A code. This issue is common in various vehicles, notably the 2015-2020 Ford F-150, where owners might experience symptoms such as erratic shifting or overheating. Ignoring this code can lead to further complications, including reduced fuel efficiency and complete transmission failure, necessitating costly repairs. Therefore, addressing this issue promptly is crucial for maintaining vehicle reliability and performance.

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

Symptoms

Common symptoms when P071A is present:

  • The check engine light stays on constantly, indicating a persistent issue with the transmission system.
  • Engine hesitates during acceleration, often accompanied by harsh or erratic shifting, making driving uncomfortable.
  • Fuel economy decreased by 10-15%, attributed to the transmission not operating efficiently due to incorrect fluid temperature readings.
  • Transmission may slip or fail to engage properly, leading to unexpected delays in power delivery when accelerating.
  • Unusual burning smell may occur from overheating transmission fluid, a serious sign that should be addressed immediately.

Possible Causes

Most common causes of P071A (ordered by frequency):

  1. The most common cause of P071A is a faulty transmission fluid temperature sensor, which accounts for about 60% of cases. This sensor may fail or send incorrect signals to the ECM due to wear or damage.
  2. Another frequent cause is wiring issues, such as damaged or corroded wiring connections between the sensor and the ECM, leading to intermittent faults.
  3. Improper transmission fluid levels or quality can also trigger this code; maintaining proper fluid levels and changing the fluid as per manufacturer guidelines can help prevent this.
  4. Less common but serious causes include internal transmission damage, which can lead to complete transmission failure if not diagnosed and repaired promptly.
  5. A rare cause might be a faulty ECM itself, though this is less likely and typically occurs if other issues have been ruled out.

P071A Repair Costs

Cost Breakdown by Repair Type

Transmission Fluid Temperature Sensor Replacement

Replacing the faulty transmission fluid temperature sensor to restore accurate readings.

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

Repairing or replacing damaged wiring or connectors in the sensor circuit.

  • Total: $100 - $250
  • Success rate: 75%
Transmission Fluid Change

Changing transmission fluid to ensure proper operation and prevent overheating.

  • Total: $80 - $150
  • Success rate: 90%
Money-Saving Tips for P071A
  • 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 P071A Diagnosis Process

Follow these systematic steps to accurately diagnose P071A. 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 to test the transmission fluid temperature sensor and inspect wiring for continuity (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the transmission fluid temperature sensor and inspect wiring for continuity (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 proper operation of the sensor and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - After repairs, verify proper operation of the sensor 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 the repair's effectiveness and ensure the code does not return (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm the repair's effectiveness and ensure the 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: P071A Diagnosis and Repair on a 2017 Ford F-150

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

Problem: Customer reported check engine light on and occasional harsh shifting.

Diagnosis: OBD2 scan revealed P071A. Visual inspection showed corrosion on the sensor wiring.

Solution: Replaced the transmission fluid temperature sensor and repaired wiring connections.

Cost: $250 (sensor $150, labor $100)

Result: Check engine light cleared, and the customer reported smoother shifting and improved performance.

Case Study 2: Transmission Fluid Issues Leading to P071A in a 2015 Chevrolet Silverado

Vehicle: 2015 Chevrolet Silverado, 60,000 miles

Problem: Owner noticed reduced fuel efficiency and slipping during acceleration.

Diagnosis: Scanned for codes; P071A was present. Fluid level was low and fluid was dirty.

Solution: Conducted a transmission fluid change and replaced the temperature sensor.

Cost: $200 (fluid change $100, sensor $100)

Result: Post-repair, the vehicle operated normally with improved fuel economy.

Diagnose P071A

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: P071A
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes