P0750 code definition
P0750 indicates a malfunction for a transmission shift solenoid. This code may be seen with other shift solenoid or transmission codes.
What the P0750 code means
The P0750 will be set when the Powertrain Control Module (PCM) detects a fault with shift solenoid “A.” The PCM controls the shift solenoid by commanding the solenoid when to engage and disengage. This fault will display a Check Engine Light on the dashboard and put the vehicle into a failsafe mode.
What causes the P0750 code?
- Faulty shift solenoid A
- Low transmission fluid level
- Dirty or contaminated transmission fluid
- Poor electrical connection for shift solenoid A
- Valve body assembly faulty
What are the symptoms of the P0750 code?
In all cases the Check Engine Light will be displayed on the dashboard. The most common symptom is the vehicle may not shift from 1st to 2nd gear or the shift will be very rough. A decrease in fuel economy may be noticed in addition to a vehicle that runs poorly or appears to misfire.
How does a mechanic diagnose the P0750 code?
The mechanic will begin by using a scan tool to access the ECU and check for any stored codes and the freeze frame data associated with each code.
Codes will then be cleared and a test drive taken to verify the fault is present.
Once the vehicle is back at the shop, a visual inspection will be performed looking for any damage or possible transmission leaks.
Next, the transmission fluid will be checked. Once the fluid level is found to be within range, the scan tool will be used to monitor the shift solenoid A performance and values.
If no conclusive faults are found, the transmission fluid may be drained and the transmission pan removed to inspect the shift solenoid A and the valve body itself.
Common mistakes when diagnosing the P0750 code
Mistakes can easily be made if diagnostic steps are not done in correct order or if steps are skipped completely. One common mistake is not paying attention to the manufacturer's way of checking the transmission fluid. Some vehicles may need to be checked with the vehicle running in neutral or in park. Some will have hot and cold lines on the dipstick or may not have a dipstick at all.
How serious is the P0750 code?
P0750 has the potential to be the first sign of a serious transmission issue. If the transmission fluid is found to be excessively dirty and has metallic particles clogging the valve body or shift solenoid causing P0750, this may be due to mechanical wear inside the transmission.
In cases where the vehicle will not shift out of gear, the car should not be driven, as this is a safety hazard that can also cause further transmission damage. Have this issue addressed immediately.
What repairs can fix the P0750 code?
- Shift solenoid A replacement
- Valve body replacement
- Transmission fluid change or correcting fluid level
- Repairing electrical connections
Additional comments for consideration regarding the P0750 code
In some circumstances, P0750 can fail to operate properly due to the solenoid being clogged with metallic particles from the transmission. When this happens replacing the shift solenoid is only a bandaid for a transmission that is failing.
Fluid level is very important for the valve body and all shift solenoids to operate properly. Low transmission fluid level is typically due to leaks. These leaks should be addressed and the fluid level filled to specification before any repairs are made to the shift solenoids or valve body.
Need help with a P0750 code?
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