P0923 OBD-II Trouble Code: Gear Shift Forward Actuator Circuit High

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0923 code

P0923 is a diagnostic trouble code (DTC) for "Gear Shift Forward Actuator Circuit High". 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 P0923 DIAGNOSTIC Get a fair and transparent estimate upfront

P0923 code definition

The P0923 trouble code notes a problem with the gear shift forward actuator circuit

What the P0923 code means

The P0923 code is a generic OBD-II trouble code that detects an issue with the transmission’s gear shift forward actuator circuit. The forward actuator is in charge of shifting the transmission into a forward-moving gear (as opposed to reverse). If the powertrain control module (PCM), or the engine control module (ECM) notices that the voltage reading from the gear shift forward actuator circuit is unusual, the P0923 code will be triggered.

What causes the P0923 code?

There are a few different problems that can result in the P0923 trouble code being detected:

  • Malfunctioning gear shift forward actuator
  • Damaged or defective forward gear guide rail
  • Damaged or defective shift shaft
  • Mechanical problem in the internal transmission
  • In very rare cases, a malfunctioning PCM, ECM, or transmission control module
  • Faulty electrical components in the transmission system, such as shorted wires or open connectors

What are the symptoms of the P0923 code?

When the P0923 trouble code is detected, the Check Engine Light will likely illuminate on the vehicle’s instrument panel. The car may also experience problems shifting into gear, and may be entirely unable to access a forward-moving gear. If the car is drivable, it is likely that the fuel efficiency will be reduced.

How does a mechanic diagnose the P0923 code?

The P0923 code will be diagnosed using a standard OBD-II trouble code scanner. A trained technician will use the scanner’s freeze frame data to gather information about the code, and to look for any additional trouble codes that are present. If multiple codes are detected, the mechanic should take care of them in the order in which they appear on the scanner. Next, the trouble codes will be reset, and the vehicle will be restarted, so the mechanic can see if the code remains detected. If it does not, then there likely was an erroneous trigger, or the code represented an intermittent error.

If the trouble code returns, then the mechanic will start with a visual inspection of the transmission system’s electrical components. All wires, connectors, fuses, and circuits should be checked, and replaced if they are in any way damaged. The technician can then inspect the gear shift forward actuator, the forward gear guide rail, and the shift shaft.

If the P0923 code is still detected, a more comprehensive inspection of the transmission and PCM will be in order.

It is important that the mechanic stop after any component is replaced to reset the trouble codes and restart the vehicle. This will allow the mechanic to know when the problem has been fixed.

Common mistakes when diagnosing the P0923 code

The most commonly made mistake when diagnosing the P0923 code comes from a failure to follow the basic OBD-II diagnosis protocol. This protocol should be followed at all times, step by step, to ensure that inspections and repairs are as quick, thorough, and effective as possible. If the protocol is not followed, it is possible that a complex component will be erroneously replaced, when a simpler fix was all that was needed.

How serious is the P0923 code?

The P0923 trouble code may or may not keep a car from being drivable. Even if the car is drivable, to drive it under this condition will run the risk of causing further damage to the transmission. For this reason, the P0923 code should be addressed as soon as it is detected.

What repairs can fix the P0923 code?

Possible repairs for the P0923 code include:

Additional comments for consideration regarding the P0923 code

It is unlikely that the P0923 trouble code signals a defective PCM, ECM, or transmission control module, so all other potential issues should be checked before one of these is assumed to be the error. However, if a control module does need to be replaced, it will also need to be reprogrammed.

Need help with a P0923 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
Check Engine Light
P0923

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0923 code.

SCHEDULE P0923 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

5,010

Rating Summary
4,615
191
48
28
128
4,615
191
48
28
128

Kenneth

19 years of experience
509 reviews
Kenneth
19 years of experience
Toyota Sequoia - Check Engine Light is on - Newport Beach, California
Kenneth did a great job and very knowledgeable. He has a great attitude and I will for sure be using him again.

Richard

11 years of experience
45 reviews
Richard
11 years of experience
Honda Civic - Check Engine Light is on - Tucson, Arizona
Had damage to wires leading to a coil and was unable to drive the car to a service center so I took a chance on having somebody come out to work on the car. It couldn't of worked out any better. Would definitely recommend Richard to anybody needing car service.

Clifton

29 years of experience
207 reviews
Clifton
29 years of experience
Dodge Ram 1500 - Check Engine Light is on - Lake Worth, Florida
Clifton was on time and very professional. I will definitely recommend him to my friends and family.

Walter

45 years of experience
85 reviews
Walter
45 years of experience
Nissan Sentra - Check Engine Light is on - Tulsa, Oklahoma
Very helpful and knowledgeable. Appreciate the friendliness on top of it, would definitely recommend.


More related articles

P0385 OBD-II Trouble Code: Crankshaft Position Sensor B Circuit Malfunction
P0385 means the crankshaft position sensor B circuit is malfunctioning
P0028 OBD-II Trouble Code: Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)
P0028 P0028 trouble code definition Intake Valve Control Solenoid Circuit Range/Performance (Bank 2) What the P0028 code means P0028 is the OBD-II generic code indicating the engine control module (ECM) has determined that the variable valve lift for the intake...
P2012 OBD-II Trouble Code: Intake Manifold Runner Control (IMRC)Circuit Low Bank 2
P2012 P2012 code definition Intake Manifold Runner Control (IMRC) Circuit Low Bank 2 Related Trouble Codes: P2004: IMRC Stuck Open Bank 1 P2005: IMRC Stuck Open Bank 2 P2006: IMRC Stuck Closed Bank 1 P2007: IMRC Stuck Closed Bank...

Related questions

I believe one of my ignition coils is bad, how can I test to see which one is bad?

The only way to determine exactly which ignition coil is damaged is to have a professional mechanic complete a diagnostic scan and download all error codes. The OBD-II error codes will pinpoint the source of engine issues. Having a mechanic...

Bad O2 sensor

I would ask for help from one of the mechanics at YourMechanic. They can come to your location and replace the faulty O2 sensor for you.

What exactly does the code P3fff mean?

Hi there. The code P3fff means that there is an issue with the PCM (the computer to the vehicle). The codes regarding gas recirculation flow and mass air flow are coming on either due to the PCM failure or due...

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