P0745 on Mazda
Pressure Control Solenoid Malfunction
P0745 on Mazda vehicles indicates pressure control solenoid malfunction. Au7o has documented this code across 1 Mazda model — most commonly on Mazda3. This transmission code indicates a problem with the pressure control solenoid (also called the line pressure or EPC solenoid), an electronically controlled valve that regulates the hydraulic fluid pressure inside the automatic transmission. The transmission computer uses this solenoid to set the right pressure for smooth, firm shifts, so when it detects an electrical fault or out-of-range performance, it sets this code. The result is often harsh, soft, or erratic shifting, and the transmission may drop into a protective limp mode. It generally points to an electrical or hydraulic issue with the solenoid itself or its control circuit. Typical repair costs on Mazda range from $400 to $2,500, depending on the specific model and root cause.
Common Causes of P0745
- •Failed or stuck pressure control (EPC) solenoid
- •Low or contaminated transmission fluid
- •Dirty fluid clogging or sticking the solenoid valve
- •Wiring or connector fault in the solenoid circuit
- •Internal valve body wear or leakage
- •Faulty transmission control module
- •Internal transmission electrical (case connector) short
P0745 on Mazda by Model
Mazda Mazda3(1 issue)
- 2004-2009 Mazda3 FN4A-EL Four-Speed Automatic Shift Solenoid and Valve Body Faults2004-2009
The FN4A-EL (Mazda's version of the Ford 4F27E) four-speed automatic used in the BK Mazda3 suffers sticking shift solenoids and worn valve-body bores. When a solenoid sticks or its driver circuit in the TCM fails, line pressure is no longer properly controlled: the car bangs into gear, flares between shifts, holds a single gear in limp mode, or refuses to shift out of first. Owners report the P0766/P0767 (shift solenoid D) and P0771 (shift solenoid E) family of codes, frequently after the fluid has gone past its life and clutch debris has circulated through the valve body. Long-neglected fluid accelerates it - the burnt clutch material is what makes the solenoid valves stick in the first place.
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View P0745 across all makes →Frequently Asked Questions
What does P0745 mean on Mazda?▼
P0745 stands for "Pressure Control Solenoid Malfunction." This transmission code indicates a problem with the pressure control solenoid (also called the line pressure or EPC solenoid), an electronically controlled valve that regulates the hydraulic fluid pressure inside the automatic transmission. The transmission computer uses this solenoid to set the right pressure for smooth, firm shifts, so when it detects an electrical fault or out-of-range performance, it sets this code. The result is often harsh, soft, or erratic shifting, and the transmission may drop into a protective limp mode. It generally points to an electrical or hydraulic issue with the solenoid itself or its control circuit. On Mazda specifically, this code is documented across 1 model.
What causes P0745 on Mazda vehicles?▼
Common causes on Mazda: Failed or stuck pressure control (EPC) solenoid, Low or contaminated transmission fluid, Dirty fluid clogging or sticking the solenoid valve, Wiring or connector fault in the solenoid circuit, Internal valve body wear or leakage. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0745 on a Mazda?▼
Repair costs on Mazda range from $400 to $2,500, depending on the specific model and root cause.
Which Mazda models have P0745 documented?▼
Au7o has documented P0745 on 1 Mazda model: Mazda3.