P1748 Code - Electronic Pressure Control Malfunction
Quick Answer
P1748 indicates Electronic Pressure Control Malfunction. Common causes include Faulty Line Pressure Solenoid, Line Pressure Solenoid harness is open or shorted, Line Pressure Solenoid circuit poor electrical connection. 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 Line Pressure Solenoid, Line Pressure Solenoid harness is open or shorted, Line Pressure Solenoid circuit poor electrical connection.
- 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.
Code P1748 Description
What are the Possible Causes of the DTC P1748?
- Faulty Line Pressure Solenoid
- Line Pressure Solenoid harness is open or shorted
- Line Pressure Solenoid circuit poor electrical connection
How to Fix the DTC P1748?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1748 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P1748 code?
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Need Help with the Code?
Get the P1748 code diagnosed by a professional: Find a repair shop in your area
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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