P0712 - Transmission Fluid Temperature Sensor Circuit Range/Performance Problem in Honda Accord and Toyota Camry

Quick Answer

P0712 means: P0712 indicates a problem with the transmission fluid temperature sensor circuit.

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

Can I drive with P0712? Immediate attention is recommended to prevent further transmission damage.

Common Questions

What does P0712 mean and how does it affect my car?

The P0712 code indicates a malfunction in the transmission fluid temperature sensor circuit. This can lead to poor shifting performance and increased wear on your vehicle's transmission. If left unchecked, it may result in overheating and significant transmission damage, which can be very costly to repair.

What are the most common causes of P0712 and how much does it cost to fix?

The most common cause of P0712 is a faulty transmission fluid temperature sensor, which can cost between $100 to $300 to replace. Other causes include damaged wiring or low transmission fluid levels, with costs varying based on the repair needed. It's important to address these issues promptly to avoid more expensive repairs.

Can I drive my car with P0712 or should I stop immediately?

While you might be able to drive your car temporarily, it’s advisable to limit driving until the issue is resolved. Continuing to drive with a P0712 code may lead to overheating and severe transmission damage, which could make repairs significantly more expensive.

How can I diagnose P0712 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform a full OBD2 scan to read the P0712 code along with any other codes that may be present. The app can provide freeze frame data that shows the vehicle's conditions at the time the code was triggered, helping you identify if the issue is consistent or intermittent.

What vehicles are most commonly affected by P0712?

The P0712 code is frequently reported in vehicles like the Honda Accord (2003-2007) and Toyota Camry (2002-2006). It's advisable to check for any manufacturer-specific service bulletins or recalls that may apply to your vehicle.

How can I prevent P0712 from happening again?

Regular maintenance is key to preventing P0712. Make sure to check your transmission fluid level regularly, inspect wiring for wear and tear, and replace the transmission fluid as recommended in your owner's manual. Using high-quality fluid can also contribute to the longevity of the transmission.

What is P0712?

The DTC code P0712 refers to a problem with the transmission fluid temperature (TFT) sensor circuit. This means that the Engine Control Module (ECM) has detected that the input signal from the TFT sensor is out of the expected range. The TFT sensor's primary role is to monitor the temperature of the transmission fluid, which is crucial for ensuring that the transmission operates within optimal conditions. If the transmission fluid is too hot or too cold, it can lead to poor shifting performance, increased wear on transmission components, and ultimately, serious damage. The P0712 code is commonly seen in vehicles such as the Honda Accord (2003-2007) and Toyota Camry (2002-2006). Drivers may notice symptoms such as erratic shifting, a check engine light, and decreased fuel efficiency. Ignoring this code can lead to overheating of the transmission, which may require costly repairs or even a complete transmission replacement. Therefore, it’s essential to address this issue promptly to maintain your vehicle's performance and longevity.

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

Symptoms

Common symptoms when P0712 is present:

  • Check engine light stays on constantly, indicating a potential issue with the transmission system.
  • Engine hesitates during acceleration, which may result from improper fluid temperature readings affecting shifting.
  • Fuel economy decreased by 10-15%, as the vehicle struggles to shift efficiently due to inaccurate temperature readings.
  • Rough or erratic shifting, where the vehicle may shift harshly or unpredictably while driving.
  • Transmission overheating, which could be indicated by unusual smells or noises coming from the transmission area.

Possible Causes

Most common causes of P0712 (ordered by frequency):

  1. Faulty transmission fluid temperature sensor (70% likelihood) - The most common cause is a malfunctioning TFT sensor that fails to send accurate readings to the ECM.
  2. Damaged wiring or connectors (15% likelihood) - Corrosion or damage to the wiring harness can disrupt the signal between the TFT sensor and the ECM.
  3. Low transmission fluid levels (10% likelihood) - Insufficient fluid can lead to overheating and inaccurate temperature readings.
  4. Faulty ECM (3% likelihood) - In rare cases, the ECM itself may be malfunctioning and misinterpreting the sensor's readings.
  5. Overheating transmission issues (2% likelihood) - If the transmission is consistently overheating, it may cause the sensor to read inaccurately.

P0712 Repair Costs

Cost Breakdown by Repair Type

TFT Sensor Replacement

Replacing the faulty transmission fluid temperature sensor.

  • Total: $100 - $300
  • Success rate: 85%
Wiring Repair

Repairing damaged wiring or connectors related to the TFT sensor.

  • Total: $50 - $150
  • Success rate: 70%
Fluid Change

Changing transmission fluid to ensure proper levels and quality.

  • Total: $100 - $200
  • Success rate: 65%
Money-Saving Tips for P0712
  • 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 P0712 Diagnosis Process

Follow these systematic steps to accurately diagnose P0712. 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 voltage and resistance of the TFT sensor (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the voltage and resistance of the TFT 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 - Verify proper operation of the transmission after repairs and clear codes (10-15 minutes)

Step 4: System function test - Verify proper operation of the transmission after repairs and clear 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 repair success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (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 Temperature Sensor Replacement in 2005 Honda Accord

Vehicle: 2005 Honda Accord, 120,000 miles

Problem: Customer reported a check engine light and rough shifting.

Diagnosis: After scanning with GeekOBD APP, the P0712 code was confirmed. A visual inspection revealed a faulty TFT sensor.

Solution: Replaced the transmission fluid temperature sensor and cleared the code.

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

Result: The customer reported smooth shifting and no check engine light after the repair.

Case Study 2: Wiring Issue in 2003 Toyota Camry

Vehicle: 2003 Toyota Camry, 150,000 miles

Problem: Customer noticed poor acceleration and a persistent check engine light.

Diagnosis: Diagnostic steps revealed damaged wiring leading to the TFT sensor.

Solution: Repaired the wiring and replaced the sensor as a precaution.

Cost: $200 (wiring repair $100, sensor $100)

Result: The vehicle performed well post-repair, with improved acceleration and no warning lights.

Diagnose P0712

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: P0712
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes