Shift Solenoid A Malfunction (P0750)
The P0750 code indicates a malfunction in the transmission shift solenoid A, which controls hydraulic pressure to engage specific gears. This solenoid is part of the transmission's valve body and is responsible for directing transmission fluid to the appropriate clutch packs. When the Powertrain Control Module (PCM) detects an electrical or performance issue with the solenoid circuit, it sets this code. Common causes include low or contaminated transmission fluid, a faulty solenoid, wiring issues, or internal transmission problems.
01. Most Common Causes
- Low or dirty transmission fluid
- Faulty shift solenoid A
- Damaged wiring or connectors in solenoid circuit
- Internal transmission failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or delayed shifting
- Transmission stuck in gear or limp mode
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and check freeze frame data.
Step 2: Inspect transmission fluid level and condition; top off or replace if necessary.
Step 3: Test solenoid A resistance and power/ground circuits with a multimeter.
Step 4: Visually inspect wiring and connectors for damage or corrosion.
Step 5: If solenoid is faulty, replace it; if wiring is damaged, repair as needed.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause further transmission damage. The vehicle may enter limp mode, limiting speed and gear selection.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a DIY solenoid replacement, but professional labor can increase the total to $200-$500 depending on the vehicle.