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

Our certified mechanics come to you · 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 $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 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 $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P0947 DIAGNOSTIC Get a fair and transparent estimate upfront

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:

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.

OBD-II
trouble codes
P0947

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0947 code.

SCHEDULE P0947 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P2723 OBD-II Trouble Code: Clutch Pressure Control Solenoid 5 - Stuck Off
P2723 means a solenoid has malfunctioned due to low fluid levels, a failing transmission, faulty sensor or solenoid, or electrical issues or problems.
B1538 OBD-II Trouble Code: Memory 2 Switch Circuit Short To Ground
B1538 means there is there is a circuit error with a power-operated seat. This could be caused by a DSM failure or faulty electrical component.
P0987 OBD-II Trouble Code: Transmission Fluid Pressure Sensor/Switch E Circuit
P0987 means there is an issue with the sensor or switch in the transmission fluid pressure E circuit, possibly due to bad fluid level or components.

Related questions

Check Engine Diagnosis - Transmission controller Communication error codes
Hello there, many different faults can cause this combination of codes on your 2006 Chrysler PT Cruiser. When we see loss of communication codes with Transmission Control Module (TCM) internal faults, this usually means one of the following: the TCM...
Why is my car accelerating by itself?
This vehicle engine has a manual throttle cable and cannot accelerate by itself. You may have a faulty idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) that can cause a high idle but is limited to only about 1250 rpm. I would recommend...
I got a p 507 code
That's a good question. P507 is your idle speed control. There are a few issues you may want to look into. The throttle valve may be sticking, bad throttle motor, ECM, or a wiring problem. I would start by checking...

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