P0748 on Ford
Pressure Control Solenoid "A" Electrical
P0748 on Ford vehicles indicates pressure control solenoid "a" electrical. Au7o has documented this code across 1 Ford model — most commonly on F-250 Super Duty. P0748 is a generic powertrain code meaning the transmission control module has detected an electrical fault — voltage or resistance out of the expected range — in the circuit for pressure control solenoid "A". This solenoid regulates hydraulic line pressure inside an automatic transmission, adjusting how firmly the clutches and bands apply based on speed, load, and throttle position. When the computer can't control the solenoid electrically, the transmission often defaults to maximum line pressure or limp mode, so you may feel harsh or erratic shifts, slipping, delayed engagement when shifting into Drive, or being locked into a single gear. Because it is an electrical-circuit code, the fault is usually in the solenoid itself or its wiring rather than a purely hydraulic problem, though contaminated fluid can damage the solenoid. Continuing to drive with slipping and overpressure shifts can overheat the transmission and lead to expensive internal damage, so this should be repaired promptly. Typical repair costs on Ford range from $2,500 to $6,000, depending on the specific model and root cause.
Common Causes of P0748
- •Failed pressure control solenoid A (open or shorted solenoid windings)
- •Damaged, frayed, or shorted wiring in the solenoid circuit, including the transmission case connector
- •Corroded or loose electrical connectors at the transmission harness
- •Low, dirty, or contaminated transmission fluid degrading or sticking the solenoid
- •Clogged transmission filter or debris in the valve body hydraulic passages
- •Faulty transmission control module or PCM driver circuit (rare)
P0748 on Ford by Model
Ford F-250 Super Duty(1 issue)
- 5R110W TorqShift Torque Converter Failure and Debris Contamination2003-2010
The 5R110W TorqShift automatic behind the 6.0L and 6.4L Super Duty trucks is a strong unit, but its stamped-steel torque converter with a single-disc lockup clutch is the weak link. Heat from towing, added horsepower, or fluid that was never changed cooks the lockup clutch lining. When the converter fails it does not fail cleanly - it sends clutch material and steel debris through the entire transmission, contaminating the valve body, the shift solenoids and the cooler circuit, so a converter failure typically takes the transmission with it. Owners first notice a shudder or vibration at lockup speeds, then harsh or erratic 3-4 and 4-5 shifts, then slipping. Solenoid faults and hard shifts on these trucks are frequently the downstream symptom of debris rather than an independent problem.
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What does P0748 mean on Ford?▼
P0748 stands for "Pressure Control Solenoid "A" Electrical." P0748 is a generic powertrain code meaning the transmission control module has detected an electrical fault — voltage or resistance out of the expected range — in the circuit for pressure control solenoid "A". This solenoid regulates hydraulic line pressure inside an automatic transmission, adjusting how firmly the clutches and bands apply based on speed, load, and throttle position. When the computer can't control the solenoid electrically, the transmission often defaults to maximum line pressure or limp mode, so you may feel harsh or erratic shifts, slipping, delayed engagement when shifting into Drive, or being locked into a single gear. Because it is an electrical-circuit code, the fault is usually in the solenoid itself or its wiring rather than a purely hydraulic problem, though contaminated fluid can damage the solenoid. Continuing to drive with slipping and overpressure shifts can overheat the transmission and lead to expensive internal damage, so this should be repaired promptly. On Ford specifically, this code is documented across 1 model.
What causes P0748 on Ford vehicles?▼
Common causes on Ford: Failed pressure control solenoid A (open or shorted solenoid windings), Damaged, frayed, or shorted wiring in the solenoid circuit, including the transmission case connector, Corroded or loose electrical connectors at the transmission harness, Low, dirty, or contaminated transmission fluid degrading or sticking the solenoid, Clogged transmission filter or debris in the valve body hydraulic passages. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0748 on a Ford?▼
Repair costs on Ford range from $2,500 to $6,000, depending on the specific model and root cause.
Which Ford models have P0748 documented?▼
Au7o has documented P0748 on 1 Ford model: F-250 Super Duty.