P0905 OBD-II Trouble Code: Gate Select 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 P0905 code

P0905 is a diagnostic trouble code (DTC) for "Gate Select 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 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 P0905 DIAGNOSTIC Get a fair and transparent estimate upfront

P0905 code definition

The P0905 code identifies a problem with the gate select circuit range/performance in an automatic transmission. It can be associated with other codes, including P0906, and P0907.

What the P0905 code means

The P0905 code is a generic OBD-II code that applies to all automakers. It is an indication that there is a deviation between sensor signal 1 and sensor signal 2 and lasting for at least one second.

What causes the P0905 code?

The P0905 code is caused by several potential issues, including the following:

  • A problem within the TCM (transmission control module)
  • An issue within the select stroke sensor
  • If there is an open or short in the select stroke sensor circuit
  • Damage to the wiring harness
  • A poor connection to the select stroke sensor/sensor circuit

What are the symptoms of the P0905 code?

Generally, a P0905 code will not cause the Check Engine Light to illuminate, but it should trip the Transmission light. A code will be stored in the vehicle’s computer for access by a qualified technician. You may not notice any other symptoms, and the vehicle may drive normally.

How does a mechanic diagnose the P0905 code?

A mechanic will first connect an OBD-II scanner to your vehicle’s OBD-II port, which is usually located under the dash on the driver side of the car, mounted above the brake and gas pedals. Some vehicles have the port mounted on the passenger side under the dash, though. A qualified mechanic will first clear the code from the car’s computer, and then test drive the vehicle to verify that the condition repeats and the code is reset.

During the test drive, the technician should view live data from the vehicle’s computer to ensure correct operating values. If the code resets, the technician will need to visually inspect the select stroke sensor and sensor circuit. Further inspection and diagnostics may need to be performed on the TCM, as well. Visual signs of damage can include corrosion, damaged or broken wires and the like. If no visual damage is noticed, the technician will conduct further diagnostics using a digital voltmeter.

Common mistakes when diagnosing the P0905 code

The most common mistake made when diagnosing this fault is when a technician does not clearly understand why the fault is set. The fault is due to perceived signal differences between multiple sensors corresponding to the transmission selector gate which should be reading very similar. Another common mistake is to overlook the wiring and the wiring connectors when diagnosing the problem, instead looking only for a failed part.

How serious is the P0905 code?

While the P0905 trouble code may not cause any drivability issues, it can become a serious problem, particularly if it indicates an issue with the TCM. Prolonged driving without having the underlying issue diagnosed and repaired could lead to damage of the transmission and a complete breakdown, leaving you stranded on the road.

What repairs can fix the P0905 code?

Repairs to fix the P0905 code can include replacement of the stroke sensor circuit, the wiring harness to the sensor, the sensor itself, reconnecting a loose wire or ground connection, or even replacing the entire TCM depending on the actual issue causing the code to set in the computer.

Additional comments for consideration regarding the P0905 code

Because there are multiple causes for the P0905 code, it is crucial to have a professional mechanic diagnose the actual problem. Simply replacing parts may not repair the issue, and driving the vehicle could cause further damage. It is also important to note that older vehicles and those with high mileage can experience momentary/temporary issues that cause codes to set even if there is no actual underlying problem.

Need help with a P0905 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
P0905
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0905 code.

SCHEDULE P0905 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6,144)

Rating Summary
5,685
221
51
35
152
5,685
221
51
35
152

Chris

11 years of experience
13 reviews
Chris
11 years of experience
Ford F-150 - Check Engine Light is on - North Salt Lake, Utah
We were having problems with our check engine light, and Chris was exceptionally thorough until he found the problem and could help resolve the situation. We appreciate having someone who cares enough to get the job done right, not just done. We will definitely use Chris' services in the future. Thanks Chris.

Leng

21 years of experience
2 reviews
Leng
21 years of experience
Mazda MPV - Check Engine Light is on - Seattle, Washington
Leng arrived on time and explained the issue that my van is having. I will make a follow up appointment for the fix. Friendly, easy to talk to, and professional - thank you very much!

Okela

13 years of experience
11 reviews
Okela
13 years of experience
Land Rover LR4 - Check Engine Light is on - Brooklyn, New York
Okela was incredible! He is super thorough and took time to walk us through the issues with our LR4. Couldn’t recommend more! Thank you Okela!!

Robert

37 years of experience
188 reviews
Robert
37 years of experience
Land Rover LR2 - Check Engine Light is on - Atlanta, Georgia
Robert arrived on time. Did a diagnostic check quickly. He was friendly, and gave great service. He knows how to work on a Land Rover.


More related articles

P2501 OBD-II Trouble Code: Generator Lamp/L-Terminal Circuit High
P2501 means there is an issue with the generator lamp control circuit. This could be due to defects in the alternator, battery, or starter.
P0857 OBD-II Trouble Code: Traction Control Input Signal Range/Performance
P0857 means that there is a malfunction found in the vehicle's traction control input signal circuit due to a faulty traction control switch.
P0923 OBD-II Trouble Code: Gear Shift Forward Actuator Circuit High
P0923 means the voltage reading from the gear shift forward actuator circuit is unusual due to a faulty forward gear guide rail, or shift shaft.

Related questions

Engine light on vsc light on air bag light blinks slow for 20 sec and fells like engine missfires

Hello, thank you for writing in. If the diagnostic troubleshooting codes are letting you know that you need a new oxygen sensor, then you will want to start there. These will make the car perform terribly, and the other issues...

Car still won't start even after replacing battery and checking fuses

If I am reading your symptom description correctly, the engine died at speed, the Check Engine light came on, and the engine now turns over but won't actually start despite a new battery. First item to check are the...

Obd plug in on my 1995 won't read any on my Obd meter

OBD-II came out in late 1995 in some vehicles, and all vehicles from 1996 onwards. You may need to try an OBD-1 scan tool or try to obtain the codes another way. It is also possible that you have some...

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