P0748 on Jaguar
Pressure Control Solenoid "A" Electrical
P0748 on Jaguar vehicles indicates pressure control solenoid "a" electrical. Au7o has documented this code across 1 Jaguar model — most commonly on XK. 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 Jaguar range from $900 to $3,000, 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 Jaguar by Model
Jaguar XK(1 issue)
- ZF 6HP Automatic Transmission Mechatronic Bridge-Seal / Sealing-Sleeve Failure2007-2014
The ZF 6HP26 (2006-2009 4.2L cars) and ZF 6HP28 (2009-2014 5.0L cars) automatic used in the X150 XK develops internal hydraulic-pressure loss as the mechatronic unit ages. The 'bridge seal' adapter (the figure-8 sealing sleeve between the valve body/mechatronic and the transmission case) hardens and cracks, and the conductor plate/solenoids degrade, causing loss of line pressure. This is the single most common ZF 6HP fault and owners frequently misdiagnose it as a dead gearbox, replacing the whole unit when only the mechatronic seal or module is at fault. ATF that is never changed (Jaguar marketed it as fill-for-life) accelerates the failure. Well documented across the shared ZF 6HP platform (also used by BMW, Land Rover, Bentley, Maserati).
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View P0748 across all makes →Frequently Asked Questions
What does P0748 mean on Jaguar?▼
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 Jaguar specifically, this code is documented across 1 model.
What causes P0748 on Jaguar vehicles?▼
Common causes on Jaguar: 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 Jaguar?▼
Repair costs on Jaguar range from $900 to $3,000, depending on the specific model and root cause.
Which Jaguar models have P0748 documented?▼
Au7o has documented P0748 on 1 Jaguar model: XK.