P1748 Code - Electronic Pressure Control Malfunction
Quick Answer
The P1748 code indicates a malfunction in the electronic pressure control system of the transmission. Common causes include Faulty electronic pressure control solenoid, Low transmission fluid level or dirty fluid, Wiring or connection issues in the control circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1748 indicates Electronic Pressure Control Malfunction.
- Common causes
- Common causes include Faulty electronic pressure control solenoid, Low transmission fluid level or dirty fluid, Wiring or connection issues in the control circuit.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1748 Description
The P1748 code indicates a malfunction in the electronic pressure control system of the transmission. This system is responsible for regulating the transmission fluid pressure to ensure smooth gear shifts. When this control system fails, it can lead to erratic shifting, harsh gear changes, slipping gears, and even transmission overheating. If left unresolved, it can cause further damage to the transmission components and result in costly repairs.
Common Causes of P1748
- Faulty electronic pressure control solenoid
- Low transmission fluid level or dirty fluid
- Wiring or connection issues in the control circuit
- Internal transmission leaks
- Mechanical failures in the transmission system
Symptoms of P1748
- Rough or delayed gear shifts
- Slipping gears
- Transmission overheating
- Illumination of the Check Engine Light
- Reduced fuel efficiency
How to Fix P1748
- Begin by diagnosing the exact cause of the electronic pressure control malfunction using a scan tool.
- Inspect the electronic pressure control solenoid and its wiring for any damage or corrosion.
- Check the transmission fluid level and condition, topping up or replacing it if necessary.
- Test the transmission for any internal leaks and repair as needed.
- Clear the error code and perform a test drive to ensure the issue has been resolved.
Cost to Fix P1748
The typical repair costs for addressing an electronic pressure control malfunction can range from $200 to $600, depending on the specific cause of the issue and the extent of repairs needed. It's important to note that these costs can vary based on factors such as location, vehicle make and model, and labor rates at the auto repair shop. It's recommended to get a detailed estimate from a trusted mechanic before proceeding with the repairs.
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Code P1748 Information for Specific Makes
- P1748 Ford — Electronic Pressure Control Malfunction
- P1748 Hyundai — TCU-ECU Communication Line 2 Malfunction
- P1748 Mazda — Electronic Pressure Control Malfunction
Frequently Asked Questions about P1748 Code
No Frequently Asked Questions about P1748 Code found.
Discuss the causes and fixes for P1748 OBDII Code
-
The code in question as already has been mentioned is related to the EPC solenoid.
The harsh shifts is because this sol is probably stuck on and is not able to vary the pressure in the trans to make the gearchanges smooth.
It,s not a common sol to go and could be caused by debris which has got into the sol.
Debris being metal which could be another problem going on in the trans.
This sol can be changed in place in the car without trans removal.
You gain access by removing the side pan of the trans which is at the front of the car to get to the valve body.
The EPC sol is located near the top left handside and is held in with 2 x 10 ml bolts.
It,s the only sol with an earth wire and can,t be mistaken for any of the others.
A trans specialist should be able to do this job easily and it,s worth trying to change this sol before going any further.
Hope this helps a bit.
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