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

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

SCHEDULE P0923 DIAGNOSTIC 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 for $69.99. 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$69.99$20.00
Toyota$69.99$20.00
BMW$69.99$20.00
SCHEDULE P0923 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

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

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

SCHEDULE P0923 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

4,240

Rating Summary
3,884
174
45
26
111
3,884
174
45
26
111
Rodney

Rodney

33 years of experience
336 reviews
Rodney
33 years of experience
Excellent. Definitely my new go to mechanic. Very knowledgeable and friendly.
2010 JEEP PATRIOT - CHECK ENGINE LIGHT IS ON - CITRUS HEIGHTS, CALIFORNIA
Jerimiah

Jerimiah

17 years of experience
274 reviews
Jerimiah
17 years of experience
Jerimiah was courteous, friendly, and professional. I would definitely recommend his services.
2008 CHEVROLET MALIBU - CHECK ENGINE LIGHT IS ON - LAS VEGAS, NEVADA
Peter

Peter

41 years of experience
1171 reviews
Peter
41 years of experience
Very knowledgeable and friendly. Goes above and beyond expectation.
2002 AUDI TT QUATTRO - CHECK ENGINE LIGHT IS ON - ANTHEM, ARIZONA
John

John

24 years of experience
254 reviews
John
24 years of experience
John arrived on time as scheduled. Very personable and professional! He did everything I asked for, diagnosing my problem(s) and addressing the immediate situation of replacing my alternator.
2006 HONDA PILOT - CHECK ENGINE LIGHT IS ON - PEARLAND, TEXAS

More related articles

How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
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...

Related questions

Q: check engine light is on -- ge -ot a diagnotics test from onstar -- test stated emmissions system issue whatdoes this mean

Hello, thanks for writing in about your Chevrolet Malibu. If they did not give you the trouble code that is stored then you are going to need to have the system tested to see if the code can be diagnosed...

Q: AC failed and started running rough and the Check Engine Light came on. But NOW its fine.

I wouldn't concern yourself with the timing of your cars symptoms. When a car fails, I liken it to when a light bulb decides to burn out. It was just its time. Everything will eventually fail. I also would strongly...

Q: check engine light is on

A fault code p0304 is typically caused by a faulty plug or a failed ignition coil. If it has been quite a while since there has been a tune up done, I would start there. Many times a misfire can...

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