P0745 OBD-II Trouble Code: Pressure Control Solenoid Malfunction

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0745 code

P0745 is a diagnostic trouble code (DTC) for "Pressure Control Solenoid Malfunction". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0745 DIAGNOSTIC Get a fair and transparent estimate upfront

What the P0745 code means

When the code P0745 appears in your powertrain control module (PCM), it means that the PCM is not reading the correct electrical voltage drops from the Pressure Control Solenoid as it does its job. It may also be that your PCM reads the correct electrical readings but that the performance of the Pressure Control Solenoid is incorrect.

What causes the P0745 code?

The most common causes for a P0745 code include a defective valve body or pressure solenoid. Your vehicle may also suffer from poor or defective wiring on your pressure solenoid. Another cause could be a dirty transmission that inhibits and restricts your vehicle’s hydraulic passages.

What are the symptoms of the P0745 code?

Some symptoms associated with this code may include an illuminated Check Engine light, or more severe symptoms such as a vehicle that cannot be driven, a decrease in your vehicle’s fuel economy, and an inability to shift from one gear to another.

How does a mechanic diagnose the P0745 code?

When diagnosing a P0745 code, you should always record the freeze frame data and then simulate these code-setting conditions with a test drive at your vehicle’s freeze frame road speed. Start from a stopped position and accelerate slowly. Pay attention to the scan data and check if your PCM is commanding the Pressure Control Solenoid. If the PCM is commanding the Pressure Control Solenoid with a higher duty cycle and the transmission is not performing as it should, then you may have discovered the issue. Your next step is to begin doing what are called “pinpoint tests,” which in this case are continuity tests and voltage drops for the Pressure Control Solenoid. If the electrical tests are within the recommended parameters, then using a pressure gauge you should test the performance of the Pressure Control Solenoid. Remember to always examine the condition of the fluid. It should be a clear red color, almost like a watered-down cranberry juice. If it appears burned or brown or dirty, then you will need to change your fluid immediately.

Common mistakes when diagnosing the P0745 code

Some technicians will mistake a P0745 for a misfiring engine or a problem with your vehicle’s performance. Others have assumed that your vehicle is suffering from a driveline problem, when in fact the issue had to do with a defective valve body or solenoid.

How serious is a P0745

In many cases, a P0745 is very serious, particularly when your vehicle will not start or your vehicle will not shift into gear properly. Typically, a professional technician should handle a P3068 code, especially considering that you will need costly diagnostic equipment and extensive knowledge to handle the repairs yourself.

What repairs can fix the P0745 code?

If your vehicle’s fluid smells or appears burned or scorched, you will need to remove the transmission pan and look for for the presence of clutch material and other dirt and debris. If you do find contaminants in the transmission pan, you may need to do a complete rebuild along with a fluid flush and fluid replacement. In some cases, a new torque converter may need to be installed before your transmission can begin to function properly again. If you do not see any debris in your transmission pan, you should visually inspect all internal wiring and connectors and replace or repair any shorted, damaged, or corroded wires and connectors.

Additional comments for consideration regarding the P0745 code

In some cases, a P0745 will prevent your car from starting or shifting smoothly from one gear to another. Another, possibly more serious issue, is the emission of toxic gases from your vehicle. You may notice unburned droplets of raw fuel that affect your breathing. Your vehicle may also emit higher levels of carbon monoxide and nitrous oxide, which both contribute to smog. Therefore, this issue is something that you will want to fix right away. But please beware that fixing this issue can become very complex and that doing the repairs on your own may involve long hours of labor with expensive diagnostic equipment. Therefore, it is important to do the correct amount of research before you begin to work. Do not hesitate to contact a professional technician for advice about this issue.

Need help with a P0745 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
P0745
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0745 code.

SCHEDULE P0745 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,170

Rating Summary
4,765
197
50
27
131
4,765
197
50
27
131

Fred

16 years of experience
364 reviews
Fred
16 years of experience
Mercedes-Benz E500 - Check Engine Light is on - Conroe, Texas
Fred was very friendly and thorough to get to the root of the issue. Even when he could not find a fault to why my engine light was on, he went above and beyond to make absolutely sure that the concern was minimized. Turns out, all that needed to be done was a reset but his diagnostic to address my issues was very intricate and appreciated.

David

17 years of experience
37 reviews
David
17 years of experience
Chevrolet Cruze - Check Engine Light is on - Aurora, Colorado
David was on time, professionalisms & honest! I would definitely request him again and pass along to friends/family.

John

18 years of experience
18 reviews
John
18 years of experience
Dodge Ram 1500 - Check Engine Light is on - Memphis, Tennessee
Demonstrated good integrity. Advised me when work I thought needed done was unnecessary and was helpful in identifying issues that needed to be addressed

Robert

21 years of experience
17 reviews
Robert
21 years of experience
Chrysler 200 - Check Engine Light is on - Fort Worth, Texas
Robert did a good job working on my car and letting me know what's needed to keep my car driving smoothly.


Related questions

My car has trouble code P0745, do I need to replace the solenoid?

Diagnostic Trouble Code P0745 refers to out of range voltage at a solenoid-operated valve that regulates hydraulic pressure in the transmission based on outputs from the Transmission Control Module (TCM). Code P0745 is set when the TCM sees an out...

More related articles

P0412 OBD-II Trouble Code: Secondary Air Injection System Switching Valve A Circuit Malfunction
P0412 P0412 code definition Secondary Air Injection System Switching Valve A Circuit Malfunction What the P0412 code means P0412 is an OBD-II generic code that the engine control module (ECM) got input from the air injection system driver that the...
P0177 OBD-II Trouble Code: Fuel Composition Sensor Circuit Range/Performance
P0177 P0177 code definition Fuel Composition Sensor Circuit Range/Performance What the P0177 code means P0177 is a generic OBD-II code indicating that the diesel fuel sensor has detected water in the fuel filter, or the fuel composition sensor is out...
B1928 OBD-II Trouble Code: Air Bag Safing Sensor Output Circuit Failure
B1928 means there is an electrical short in the air bag safing sensor, likely due to a defective electrical component or sensor.

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com