P0847 - Understanding DTC P0847: Transmission Fluid Pressure Sensor Range/Performance Problem

Quick Answer

P0847 means: P0847 indicates a problem with the transmission fluid pressure sensor circuit.

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

Can I drive with P0847? Immediate attention required to avoid severe transmission damage.

Common Questions

What does P0847 mean and how does it affect my car?

P0847 signifies a problem with the transmission fluid pressure sensor, which can lead to erratic shifting, slipping, or even total transmission failure if not addressed. This can affect your vehicle's performance and safety, making it crucial to resolve the issue promptly.

What are the most common causes of P0847 and how much does it cost to fix?

The most common causes of P0847 include a faulty transmission fluid pressure sensor, wiring issues, and problems with the transmission control module. Repair costs can range from $100 for wiring repairs to $800 for a TCM replacement, depending on the specific issue.

Can I drive my car with P0847 or should I stop immediately?

Driving with P0847 is not advisable as it can lead to serious transmission damage. If you notice symptoms like slipping or rough shifting, it’s best to stop driving and have the vehicle inspected.

How can I diagnose P0847 myself using GeekOBD APP?

You can diagnose P0847 using the GeekOBD APP by connecting it to your vehicle's OBD2 port, scanning for codes, and reviewing the freeze frame data to understand the context of the fault. This helps pinpoint the issue more accurately.

What vehicles are most commonly affected by P0847?

P0847 is commonly seen in vehicles like the 2007-2015 Chevrolet Silverado, 2010-2015 Ford Fusion, and many other models equipped with automatic transmissions. Always check for recalls or technical service bulletins related to your specific make and model.

How can I prevent P0847 from happening again?

To prevent P0847 from recurring, ensure regular transmission fluid changes, keep an eye on fluid levels, and perform routine inspections of the wiring and connectors related to the transmission system.

What is P0847?

DTC P0847 indicates that the Engine Control Module (ECM) has detected a problem with the transmission fluid pressure sensor circuit. This sensor plays a crucial role in monitoring the hydraulic pressure within the transmission, which is essential for smooth gear shifting and overall transmission performance. When this code appears, it suggests that the pressure readings are outside of the expected range, which can lead to various transmission issues, including hard shifting, slipping, or even complete transmission failure. Commonly found in vehicles such as 2007-2015 Chevrolet Silverado and 2010-2015 Ford Fusion, this code can arise from faulty sensors, damaged wiring, or issues with the transmission control module (TCM). Ignoring this code can lead to severe transmission problems, affecting your vehicle's drivability and potentially resulting in costly repairs down the line. Therefore, understanding and addressing P0847 promptly is essential for maintaining your vehicle's performance and reliability.

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

Symptoms

Common symptoms when P0847 is present:

  • Check engine light stays on constantly, indicating a persistent issue that needs attention.
  • Transmission hesitates or slips during acceleration, making it difficult to maintain speed.
  • Fuel economy decreased by 10-15%, as the engine works harder to compensate for transmission issues.
  • Rough shifting or delayed engagement when changing gears, affecting overall driving comfort.
  • Unusual noises from the transmission area, such as grinding or whining, signaling potential mechanical failure.

Possible Causes

Most common causes of P0847 (ordered by frequency):

  1. Faulty transmission fluid pressure sensor (50% likelihood) - This is the most common cause, where the sensor fails to send accurate pressure readings to the ECM.
  2. Wiring issues or short circuits (30% likelihood) - Damaged wiring or poor connections can disrupt the sensor's function, leading to incorrect readings.
  3. Transmission control module failure (15% likelihood) - A malfunctioning TCM can misinterpret sensor data, leading to erratic transmission behavior.
  4. Fluid contamination or low levels (10% likelihood) - Dirty or low transmission fluid can affect pressure readings and overall transmission performance.
  5. Rarely, software issues within the ECM can also cause erroneous readings, but this is less common.

P0847 Repair Costs

Cost Breakdown by Repair Type

Replace Transmission Fluid Pressure Sensor

Replacing the faulty sensor to restore proper function.

  • Total: $150 - $300
  • Success rate: 90%
Repair Wiring Issues

Fixing damaged wiring or connectors in the sensor circuit.

  • Total: $100 - $200
  • Success rate: 85%
Transmission Control Module Replacement

Replacing a failed TCM if necessary.

  • Total: $400 - $800
  • Success rate: 75%
Money-Saving Tips for P0847
  • 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 P0847 Diagnosis Process

Follow these systematic steps to accurately diagnose P0847. 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 multimeter or specific diagnostic tools to test the transmission fluid pressure sensor and wiring (20-30 minutes)

Step 3: Component testing - Use multimeter or specific diagnostic tools to test the transmission fluid pressure sensor and wiring (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 using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs 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 repair success and monitor performance (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor performance (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 on 2010 Ford Fusion

Vehicle: 2010 Ford Fusion, 120,000 miles

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

Diagnosis: After scanning with GeekOBD APP, P0847 was confirmed, leading to a visual inspection revealing a faulty sensor.

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

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

Result: After the repair, the check engine light was off, and the transmission shifted smoothly.

Case Study 2: Wiring Repair for 2015 Chevrolet Silverado

Vehicle: 2015 Chevrolet Silverado, 80,000 miles

Problem: Owner experienced slipping transmission and poor performance.

Diagnosis: P0847 was detected, and a thorough inspection revealed damaged wiring in the sensor circuit.

Solution: Repaired the wiring and reconnected the sensor.

Cost: $180 (parts $30, labor $150)

Result: Post-repair, the transmission performed well, and no codes reappeared.

Diagnose P0847

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: P0847
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes