P0723 OBD-II Trouble Code: Output Speed Sensor Malfunction

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

SCHEDULE P0723 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0723 code

P0723 is a diagnostic trouble code (DTC) for "Output Speed Sensor 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 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 P0723 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0723 code definition

The P0723 fault code is representative of the condition known as Output Speed Sensor Intermittent. Similar related codes include P0720, P0721, and P0722, which may all indicate a problem with the OSS (output speed sensor) or ISS (input speed sensor).

What the P0723 code means

P0723 is the OBD-II code which indicates an intermittent, erratic, or otherwise abnormal signal produced by the transmission’s output speed sensor (OSS). This sensor sends information to the PCM (powertrain control module), or in some vehicles, to a dedicated TCM (transmission control module) regarding rotational speed of the output shaft. Proper OSS function is crucial because if the signal is faulty, the transmission cannot shift appropriately. While each OSS design varies, in most cases the PCM detects erratic behavior by measuring how long the signal remains at a certain level of RPMs. If this level is maintained at too high of a level for too long, or changes in a way other than expected, the P0723 code will be triggered.

What causes the P0723 code?

Common causes of this fault code include:

  • A faulty output speed sensor
  • A faulty input speed sensor
  • Shorted or otherwise damaged wiring or connectors
  • A faulty shift solenoid
  • A faulty engine temperature sensor
  • A damaged valve body
  • Contaminated or dirty transmission fluid

What are the symptoms of the P0723 code?

The Check Engine light typically comes on, and there may be perceptible symptoms such as rough or absent shifting, decreased fuel efficiency, speedometer inaccuracy, stalls or hesitation, and/or engine misfires.

How does a mechanic diagnose the P0723 code?

As with most repairs, the diagnostic process begins with pulling stored codes and freeze frame data using a specialized scanner. If there are other codes present, these should be addressed in the order they occurred. The codes will then be cleared and the vehicle test driven to see if the code returns.

A technician will visually inspect the wiring and involved components, as well as check the transmission fluid for debris. They will then use a voltmeter to measure the reference voltage and ground signal at the OSS. If one of these circuits is open, the mechanic will then check for continuity and resistance in the circuits.

If everything else is determined to be functioning correctly, your mechanic may use an oscilloscope to live monitor the transmission output speed sensor data. Most often, the output speed sensor itself needs replacing, or there is a bad connection in the circuit.

Common mistakes when diagnosing the P0723 code

Due to the complexity of the transmission system, it’s easy to misdiagnose the OSS problem as a transmission or engine malfunction. The VSS (vehicle speed sensor) is also frequently mistakenly replaced in this situation.

How serious is the P0723 code?

This fault code can cause significant drivability problems, which may lead to further damage to the vehicle. It’s crucial to avoid driving as much as you can until you can have the repair made.

What repairs can fix the P0723 code?

Repairing the P0723 code may include the following steps:

Additional comments for consideration regarding the P0723 code

There are a number of things to take into consideration when faced with a speed sensor malfunction. The OSS doubles as the VSS (vehicle speed sensor) in some vehicles, so you want to be sure whether you have one or both before attempting repairs. In addition, some vehicles are equipped with a TFT (transmission fluid temperature) sensor, and if this sensor experiences a fault, it can trip an OSS fault code. Due to the wide variety of issues that can cause a P0723, you’re best off consulting a professional mechanic to help with the diagnosis and repair.

Need help with a P0723 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.

P0723
trouble codes
Check Engine Light

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

SCHEDULE P0723 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

Brian

20 years of experience
49 reviews
Brian
20 years of experience
Brian is very courteous and professional. Upon pointing out a couple of items in the vehicle, I knew that he was a master mechanic. This was only the service inspection. I thought so highly of him, I told him that I wanted to go ahead with the work recommended.
2008 CHEVROLET TAHOE - CHECK ENGINE LIGHT IS ON - JACKSONVILLE, FLORIDA

Noni

19 years of experience
10 reviews
Noni
19 years of experience
Noni was a breath of fresh air after having been experiencing a lot of mechanics who just took my money and made my particular auto problems worse. He was honest and extremely knowledgeable about the my issues. And although he couldn't fix my problems he was able to indentify the issues and how how they might have occurred. Which is a lot more than anyone else has been able to find. As it turns out I have electronic issues which must be fixed first. No other mechanic shop would tell me this but was extremely honest and forth coming in how I should proceed further. And it didn't cost me an arm and a leg which was a good feeling. I so appreciated his expertise. Looking forward to seeing him for future work. As I have finally found a mechanic, thanks again.
2009 VOLKSWAGEN TIGUAN - CHECK ENGINE LIGHT IS ON INSPECTION - OZONE PARK, NEW YORK

Joe

40 years of experience
603 reviews
Joe
40 years of experience
As usual... joe is a straight up, trustworthy guy.
2005 TOYOTA COROLLA - CHECK ENGINE LIGHT IS ON - TAMPA, FLORIDA

Honorio

16 years of experience
658 reviews
Honorio
16 years of experience
2004 TOYOTA SIENNA - CHECK ENGINE LIGHT IS ON - SUNNYVALE, CALIFORNIA

More related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...

Related questions

Q: On slow moving traffic, when i release the brakes, the car has lags for half a second before take off... computer scan shows p2138

This code is related to a faulty throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of a vehicle. The sensor is usually located on the butterfly spindle/shaft so that it can...

Q: P0455 Code

The code P0455 is an indication that the fuel system cannot hold vapor pressure when it is put into testing. This means you have a leak somewhere. Since you did not have the issue before you had worked on the...

Q: Fuel System?

A whirring noise is actually a common symptom of a failing fuel pump. You can rule the power steering pump in or out just by disconnecting power steering belt. Obviously, if the noise remains the same with pump disconnected, then...

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