Skip the auto shop - Our mechanics make house calls

P2765 OBD-II Trouble Code: Input/Turbine Speed Sensor B Circuit

check engine light

P2765 code definition

The P2765 code is a generic powertrain code related to the transmission or gearbox. In particular, it states that the engine control module (ECM) is receiving incorrect information from the input/turbine speed sensor B.

Codes related to the P2765 include:

  • P2766: Input/Turbine Speed Sensor “B” Circuit Range/Performance
  • P2767: Input/Turbine Speed Sensor “B” Circuit No Signal
  • P2768: Input/Turbine Speed Sensor B Circuit Intermittent
  • P2784: Input/Turbine Speed Sensor A/B Correlation

What the P2765 code means

The ECM receives signal inputs from the engine speed sensor, which it translates to the transmission to help it shift correctly. When a P2765 code is stored, it means the system has multiple input speed sensors and it is specifying an issue with sensor B, noting that either an incorrect, erratic, or no signal is being received. Check your vehicle’s service manual to confirm the location of the B sensor.

A vehicle’s ECM expects input speed to gradually increase and not exceed the output speed. At this point, a shift point is reached. When the ECM receives a signal that either varies from set parameters from input sensor B, a P2765 code will be stored.

What causes the P2765 code?

Several problems may cause a P2765 code including:

What are the symptoms of the P2765 code?

How does a mechanic diagnose the P2765 code?

A mechanic may use several methods to diagnose a P2765 trouble code, including:

  • Utilize an OBD-II scanner to check for a stored P2765 trouble code
  • Visually inspect all wires and connectors for possible damage
  • Check for voltage and ground signals at input speed sensor
  • Check for continuity and resistance in both voltage and ground circuits
  • Check for damaged or faulty shift solenoid
  • Test for damaged or faulty engine temperature sensor

Common mistakes when diagnosing the P2765 code

Sometimes, a vehicle speed malfunction may be considered as the cause of the P2765 code, causing the unnecessary replacement of vehicle speed sensors.

How serious is the P2765 code?

Because a vehicle’s safe driving operation may be impacted due to faults that store a P2765 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 P2765 code?

Several repairs can fix a P2765 trouble code and include:

  • Repair or replace any damaged or corroded wiring and connectors

  • Flush and fill transmission fluid

  • Repair or replace damaged or defective input speed sensor circuits and connectors

  • Repair or replace damaged or defective output speed sensor circuits and connectors

  • Repair or replace damaged or defective shift solenoid

  • Repair or replace damaged or defective engine temperature sensor

  • Repair or replace any damaged or defective system circuits, components, and wiring

  • Clear all codes, test-drive the vehicle, and rescan to see if any codes reappear

Additional comments for consideration regarding the P2765 code

As many vehicles will require multiple faults or failures before a P2765 code will illuminate a service engine or warning light, vehicle owners should be aware that it may not signify the first time the issue has occurred.

Need help with a P2765 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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


Post a question and get free advice from our certified mechanics.


More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of acceptable voltage to be produced from the throttle position...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...

Related questions

Q: Check engine light on

There is a technical service bulletin that pertains to these codes for you vehicle. The TSB is: 08-07-30-021H. The bulletin pertains to a wire harness problem throughout the vehicle. You may have chafed wires, pin corrosion in connections, or pins...

Q: Code P0303 cylinder 3 misfire

The symptoms you describe along with the blinking Check Engine Light and P0303 trouble code definitely tell us that you have a misfire in cylinder number 3. Your engine uses a coil on plug system. This means each individual...

Q: Timing chain is a really pricey problem

Hello, since there are many reasons the check engine light may come on, I don't believe you should be concerned, but you should have your Check Engine light diagnosed by a professional at YourMechanics to be safe. The good news...