P0947 OBD-II Trouble Code: Hydraulic Pump Relay Circuit Low

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0947 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0947 code

P0947 is a diagnostic trouble code (DTC) for "Hydraulic Pump Relay Circuit Low". 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 for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 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$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0947 DIAGNOSTIC Get a fair and transparent estimate upfront

diagnostic check engine light

P0947 code definition

The P0947 code is a generic powertrain code related to the transmission, including pressure faults and sensor failures. In this case, the transmission control module has detected a low voltage signal coming from the hydraulic pump relay circuit.

What the P0947 code means

A vehicle utilizes the pump to generate hydraulic pressure. Channels direct the transmission fluid in an automatic transmission to the valve body. The shift solenoid valves and pressure control solenoid valves are both located in the valve body. The transmission control module manages and activates electronically controlled valves, which are utilized for gear shifting. In particular, the shift solenoid manages the clutch, brakes, and bands in the transmission while the pressure control solenoid valve (one or more) manages the hydraulic pressure inside the vehicle’s transmission.

A code P0947 will be stored when the transmission control valve receives a voltage signal lower than manufacturer-specific allowed variations from one of the valves.

What causes the P0947 code?

Several problems may cause a P0947 code including:

  • Low transmission fluid
  • Dirty transmission fluid
  • Damaged or defective wiring or related electrical connector
  • Damaged or defective hydraulic pump relay
  • Damaged or defective transmission control module
  • Damaged or defective ECM

What are the symptoms of the P0947 code?

Symptoms of a P0947 code may include:

  • Check engine or warning light may illuminate
  • Vehicle may shift roughly
  • Vehicle may not shift at all
  • May experience transmission slippage

How does a mechanic diagnose the P0947 code?

A mechanic may use several methods to diagnose a P0947 trouble code, including:

  • Utilize an OBD-II scanner to check for a stored P0947 trouble code
  • Check transmission fluid levels
  • Check transmission fluid quality
  • Check transmission pan for possible debris, including clutch debris, which could be the sign of a larger transmission-related problem
  • Visually inspect the wiring and electrical components related to the hydraulic pump relay circuit for possible damage
  • Check, in specific, the harness from the transmission control module to the transmission for any signs of damage
  • Check resistance across terminals
  • Repeat resistance test at transmission connector if resistance is not at normal levels

Common mistakes when diagnosing the P0947 code

With any transmission-related fault code, it is recommended to check transmission fluid levels and quality, test drive the vehicle, and rescan to see if the code reappears prior to performing more complicated diagnosis and repairs.

How serious is the P0947 code?

Because a vehicle’s safe driving operation most likely will be impacted due to faults that store a P0947 code, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.

What repairs can fix the P0947 code?

Several repairs can fix a P0947 trouble code and include:

Additional comments related to a P0947 code

The pressure control solenoid valve is often located inside the transmission, which can be a difficult repair. It is recommended to utilize a professional for diagnosis and repair for a P0947 code.

Need help with a P0947 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
OBD-II
P0947

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0947 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,815

Rating Summary
3,485
164
43
24
99
3,485
164
43
24
99

Grzegorz

38 years of experience
440 reviews
Grzegorz
38 years of experience
Punctual, professional and knowledgeable, what more could you ask for ?!!
2006 NISSAN TITAN - CHECK ENGINE LIGHT IS ON - SOUTH SAN FRANCISCO, CALIFORNIA

Michael

45 years of experience
75 reviews
Michael
45 years of experience
What a great person! Will be using Mr. Taylor again!
2006 HONDA CR-V - CHECK ENGINE LIGHT IS ON - GERMANTOWN, TENNESSEE

Jerome

21 years of experience
246 reviews
Jerome
21 years of experience
Jerome was prompt. He was knowledgeable and professional. He stemmed comfortable and confidence in his inspection.
2001 HONDA CR-V - CHECK ENGINE LIGHT IS ON INSPECTION - PIKESVILLE, MARYLAND

Ben

38 years of experience
894 reviews
Ben
38 years of experience
On time, professional, honest. Knows his stuff!
2009 MINI COOPER - CHECK ENGINE LIGHT IS ON - HOUSTON, TEXAS

More related articles

How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....

Related questions

Q: How do I replace the airflow sensor on my 1985 olds 98

You definitely want to reset the computer when you make a repair like this. Resetting the computer will allow it to check the new component for proper operation and set a Diagnostic Trouble Code if there is still a problem....

Q: OBD not working

Hi there. If the OBD port is not working then most of the time this is caused by a loss of power to the plug. The fuse to the plug needs to be checked first to see if it is...

Q: Possible issue with the shift solenoid or TCM?

It could be either one and it's impossible to say without inspecting the car. The difference between the O'Reilly diagnosis and the dealer's is probably one of equipment. O'Reilly uses a generic OBD-II scanner and the dealer should be using...

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.

1-800-701-6230 · hi@yourmechanic.com