P0750 - Transmission Control System Malfunction (Common in 2006-2010 Toyota Camry and Honda Accord)

Quick Answer

P0750 means: DTC P0750 signals a malfunction in the transmission control system related to the shift solenoid 'A'.

Fix: Check and replace faulty components Cost: $150 - $400 Time: 90-180 minutes

Can I drive with P0750? Immediate attention is recommended to avoid further transmission damage.

Common Questions

What does P0750 mean and how does it affect my car?

The P0750 code indicates a problem with the shift solenoid 'A' in your vehicle's transmission control system. This can lead to issues like rough shifting, poor acceleration, and decreased fuel efficiency. If ignored, it can cause significant damage to the transmission, leading to costly repairs.

What are the most common causes of P0750 and how much does it cost to fix?

Common causes of P0750 include a faulty shift solenoid, wiring issues, low transmission fluid, and a failing transmission control module. Repair costs can range from $100 for wiring repairs to over $1,200 for TCM replacement.

Can I drive my car with P0750 or should I stop immediately?

While it may be possible to drive short distances with P0750, it is not advisable. Continuing to drive can worsen transmission issues and lead to more severe damage. It’s best to address the problem as soon as possible.

How can I diagnose P0750 myself using GeekOBD APP?

To diagnose P0750 using GeekOBD APP, connect the app to your vehicle, scan for DTCs, and review the freeze frame data to understand the context of the fault. You can then perform component tests suggested by the app to check the solenoid functionality.

What vehicles are most commonly affected by P0750?

Common vehicles that experience the P0750 code include the 2006-2010 Toyota Camry, 2007-2011 Honda Accord, and 2005-2010 Ford Focus. It's recommended to check for any recalls or technical service bulletins (TSBs) related to the transmission system.

How can I prevent P0750 from happening again?

To prevent P0750 from recurring, ensure regular maintenance of your vehicle’s transmission system. This includes checking and changing the transmission fluid as per the manufacturer's recommendations and keeping an eye on wiring and connectors for signs of wear.

What is P0750?

The Diagnostic Trouble Code (DTC) P0750 indicates a malfunction in the transmission control system, specifically relating to the shift solenoid 'A'. This solenoid is a critical component that regulates the flow of transmission fluid, enabling the automatic transmission to shift gears efficiently. When the P0750 code appears, it often means that the Engine Control Module (ECM) has detected a problem with the electrical circuit or performance of the shift solenoid 'A'. Common implications of this code include poor acceleration, erratic shifting, and potential transmission overheating. If left unaddressed, this issue can lead to more severe transmission problems, which can result in costly repairs. Real-world experiences show that drivers may notice their vehicle struggling to shift gears smoothly or experiencing delays in acceleration. Failing to diagnose and repair a P0750 code can not only affect your driving experience but can also lead to further damage to the transmission system over time, making it crucial to address promptly.

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

Symptoms

Common symptoms when P0750 is present:

  • Check engine light illuminates and remains on, indicating a persistent issue that needs attention.
  • Engine hesitates during acceleration, making it difficult to maintain speed or merge into traffic safely.
  • Fuel economy decreased by 10-15%, as the vehicle struggles to shift efficiently, leading to increased fuel consumption.
  • Transmission may slip or refuse to engage in the correct gear, causing a jerking sensation while driving.
  • Unusual noises, such as grinding or whining from the transmission area, suggesting mechanical failure.

Possible Causes

Most common causes of P0750 (ordered by frequency):

  1. Faulty shift solenoid 'A' - This is the most common cause, accounting for about 60% of P0750 occurrences. A malfunctioning solenoid can fail to engage properly, disrupting the transmission.
  2. Wiring issues - Damaged or corroded wiring in the transmission circuit can lead to signal failure, causing the code to trigger. Regular inspections can help prevent this.
  3. Low transmission fluid levels - This can cause gear shifting issues, as low fluid can lead to overheating and insufficient hydraulic pressure. Checking fluid levels regularly is vital.
  4. Transmission control module (TCM) failure - While less common, a malfunctioning TCM can disrupt solenoid operation, leading to P0750. This requires more in-depth diagnostics.
  5. Contaminated transmission fluid - Debris or old fluid can lead to solenoid malfunction. Regular fluid changes can help prevent buildup and maintain system health.

P0750 Repair Costs

Cost Breakdown by Repair Type

Shift Solenoid Replacement

Replacing the faulty shift solenoid 'A' can resolve the code P0750 effectively, restoring proper transmission function.

  • Total: $150 - $400
  • Success rate: 85%
Wiring Repair

Repairing damaged wiring or connectors can help restore the signal flow to the solenoid.

  • Total: $100 - $250
  • Success rate: 75%
Transmission Control Module Replacement

If the TCM is faulty, replacing it can be necessary, though this is less common.

  • Total: $500 - $1,200
  • Success rate: 70%
Money-Saving Tips for P0750
  • 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 P0750 Diagnosis Process

Follow these systematic steps to accurately diagnose P0750. 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 or specific diagnostic tools to test the suspected shift solenoid and associated wiring (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the suspected shift solenoid and associated 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 to ensure the issue is resolved (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes to ensure the issue is resolved (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 that the symptoms are resolved (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and that the symptoms are 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: Shift Solenoid Replacement on a 2008 Toyota Camry

Vehicle: 2008 Toyota Camry, 120,000 miles

Problem: Customer reported poor acceleration and the check engine light was on.

Diagnosis: Diagnosed P0750 code through OBD2 scan. Tested shift solenoid and found it faulty.

Solution: Replaced the shift solenoid 'A' and topped off the transmission fluid.

Cost: $320 (including parts and labor)

Result: Customer reported smooth gear shifting and improved acceleration after the repair.

Case Study 2: Wiring Repair on a 2009 Honda Accord

Vehicle: 2009 Honda Accord, 95,000 miles

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

Diagnosis: OBD2 scan revealed P0750. Found damaged wiring harness near the transmission.

Solution: Repaired damaged wiring and reconnected loose terminals.

Cost: $180 (including parts and labor)

Result: After repair, the check engine light was cleared, and shifting issues were resolved.

Diagnose P0750

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: P0750
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes