P0929 OBD-II Trouble Code: Gear Shift Lock Solenoid Circuit Range/Performance

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0929 code

P0929 is a diagnostic trouble code (DTC) for "Gear Shift Lock Solenoid Circuit Range/Performance". 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 is on diagnostic inspection. 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.

P0929 code definition

The P0929 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 fault with the gear shift lock solenoid circuit.

What the P0929 code means

A vehicle with an automatic transmission uses the gear shift lock solenoid to ensure that your vehicle cannot be shifted out of “Park” without the brake pedal being depressed. When the vehicle engine is “on” and the brake pedal is fully depressed, the gear shift lock solenoid allows the vehicle to shift from “Park” to “Reverse” or “Drive.”

When the engine control module (ECM) detects an abnormal voltage reading or signal from the gear shift lock solenoid, a code P0929 can be stored.

What causes the P0929 code?

Several problems may cause a P0929 code including:

What are the symptoms of the P0929 code?

Symptoms of a P0929 code may include:

How does a mechanic diagnose the P0929 code?

A mechanic may use several methods to diagnose a P0929 trouble code, including:

  • Utilize an OBD-II scanner to check for a stored P0929 trouble code
  • Check transmission fluid level
  • Check transmission fluid quality
  • If transmission fluid is dirty, check transmission pan for signs of clutch debris or other contaminants
  • Check battery voltage/charge
  • Visually inspect the wiring and electrical system for any obvious signs or damage or wear
  • Check for any blown fuses
  • Test gear shift lock solenoid for continuity
  • Test brake light switch for continuity

Common mistakes when diagnosing the P0929 code

One common cause of a P0929 trouble code is a faulty brake light switch, which will not allow the vehicle to move out of park. The fuse that controls the brake light switch and shift lock may have blown, and should be diagnosed before performing further repairs or replacements.

How serious is the P0929 code?

Because a vehicle’s safe driving operation most likely will be impacted due to faults that store a P0929 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 P0929 code?

Several repairs can fix a P0929 trouble code and include:

Note, an automatic transmission will have a “shift lock” feature, which can allow the drive to temporarily bypass a locked gear shift solenoid, and allow you to shift into drive to move your vehicle to a mechanic or out of a potentially dangerous location.

Need help with a P0929 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
P0929
OBD-II

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0929 code.

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

5,754

Rating Summary
5,319
212
50
34
139
5,319
212
50
34
139

Victor

34 years of experience
134 reviews
Victor
34 years of experience
Ford F-150 - Check Engine Light is on - Albuquerque, New Mexico
Awesome mechanic! Very thorough in explaining what the possibilities are and where to start from in regards to getting out truck in to shape. Love the ability to have a mechanic come to you, especially with a young family. Highly recommend!

Paul

18 years of experience
238 reviews
Paul
18 years of experience
Nissan 370Z - Check Engine Light is on - Tampa, Florida
Paul was amazing really good guy very informative and really profesional confirmed it was my o2 sensors and check to make sure everything else was good. Will recommend to everyone!!

Mohammed

8 years of experience
152 reviews
Mohammed
8 years of experience
Ford F-150 - Check Engine Light is on - Morrisville, North Carolina
Mohammed is a great mechanic and a great guy. Very thorough, professional, and a funny guy. I would recommend him to anyone. Thank you!

Kyle

11 years of experience
58 reviews
Kyle
11 years of experience
Ford Focus - Check Engine Light is on - Las Vegas, Nevada
Excellent experience. Kyle was very friendly and resolved the problem fast with a reasonable quote.


More related articles

P0217 OBD-II Trouble Code: Engine Overheat Condition
P0217 P0217 code definition Engine Overheating Condition What the P0217 code means The P0217 code means that the engine is or was overheating and should be turned off as soon as possible. Most engines have an engine coolant temperature...
P0709 OBD-II Trouble Code: Transmission Range Sensor Circuit Malfunction
P0709 P0709 code definition The P0709 code is known as Transmission Range Sensor Circuit Intermittent. What the P0709 code means The meaning of P0709 varies slightly among makes and models, but in general, this code indicates that the PCM (powertrain...
P0590 OBD-II Trouble Code: Cruise Control Multi-Function Input “B” Circuit Stuck
P0590 means an electrical issue with the cruise control multi-function input B circuit, commonly caused by a malfunctioning cruise control switch.

Related questions

P0446 trouble code

Hi there, thanks for writing in. This P0446 trouble code relates to the evaporation control system circuit, which is a restricted vent path for the EVAP (Emergency Vehicle Accident Prevention) system. There is a solenoid in this circuit that sometimes...

Stalls out when I put in drive p1729

Given your mileage, it is likely the throttle body and idle air controller need cleaning. It is also possible the throttle position sensor (which communicates with the transmission) may also be failing. This would seem more likely since your replacement...

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