P2767 Input/turbine speed sensor B circuit has no signal

P2767 input speed sensor B no signal

Severity not verified — if the car runs badly, have it inspected

The computer needs the speed signal to time shifts, and Jeep owners report the vehicle not accelerating or being stuck in gear, but we found no source on how long it is safe to drive.

It gets more serious if:

  • Inspect soon: The vehicle will not accelerate, is stuck in a gear or the revs rise without speed.

Source: how we rate severity

P2767 in short

P2767 means the transmission computer is getting no signal from input or turbine speed sensor B. It uses that speed to time shifts, so expect slipping, harsh shifts or limp mode. Causes include low or dirty fluid, a faulty speed sensor, wiring, a solenoid or an internal transmission fault. Get it checked soon.

The input speed sensor tells the computer how fast the transmission input shaft turns. P2767 sets when sensor B gives no signal at all.

A parts reference lists dirty or low fluid, bad input or output speed sensors, wiring or connector faults, a pressure control solenoid and internal failure as possible causes.

Owners of 2006 and 2009 Jeep Commanders and Grand Cherokees report P0700 and P2767 with lost acceleration or no drive, and one mechanic blamed an internal servo short. That is one owner account, not a bulletin; we found no bulletin for this code.

Most likely causes

These are general causes for this code across vehicles. None is specific to one make or model.

  1. Low or contaminated transmission fluid

    Common general cause
    Why it ranks here
    A parts reference lists fluid level and condition first.
    What would change this
    Rises if the fluid is low, dark or burnt. Falls if it is full and clean.

  2. Input or output speed sensor B, or its wiring

    Common general cause
    Why it ranks here
    The code names the sensor circuit, and the reference lists the sensors and wiring.
    What would change this
    Rises if the sensor signal is missing and the wiring is damaged. Falls if the sensor and wiring test good.

  3. Internal transmission fault (solenoid or servo)

    Possible — needs testing
    Why it ranks here
    A Grand Cherokee mechanic blamed an internal servo short; owner account.
    What would change this
    Rises if sensor, wiring and fluid test good. Falls if the sensor is found bad.
    How to test the transmission control module (tcm)

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Read all codes and check the fluid level and condition; note whether P0700 is stored.

    Low riskTool: OBD-II scan tool

  2. Have a shop test the input speed sensor signal and its wiring.

    Best left to a shopTool: scan tool with live data, multimeter

    Warning:Some speed sensors are inside the transmission; leave it to a shop.

Symptoms

  • Check engine light on
  • Revs rise without the vehicle accelerating Gets more serious: stop and have it checked.
  • Harsh shifts or limp mode Gets more serious: stop and have it checked.

Compare with: Check engine light with loss of power

How to fix

  1. Check the transmission fluid level and condition, following the owner's manual.

On your vehicle

Jeep

  • 2006 · Commander

    Supported by vehicle data

    A 2006 Commander owner reports P0700 and P2767, called input speed sensor by the dealer.

  • 2006–2009 · Grand Cherokee

    Supported by vehicle data

    Owners of 2006 and 2009 Grand Cherokees report P2767 with lost acceleration or no drive, and an internal servo short diagnosis.

  • P0700Transmission module requests the check engine light

    Shares causes Supported by vehicle data

    Jeep owners report P0700 stored with P2767; P0700 only says a transmission fault asked for the light.

All Transmission codes

Sources and review

  1. P2767 OBD-II trouble code: Input/Turbine Speed Sensor 'B' circuit no signal — PartsAvatar
  2. NHTSA complaint 1194157: 2006 Jeep Grand Cherokee, P0700 and P2767 — NHTSA (owner complaint)
  3. NHTSA complaint 1410551: 2009 Jeep Grand Cherokee, P2767 — NHTSA (owner complaint)
  4. NHTSA complaint 1016747: 2006 Jeep Commander, P0700 and P2767 — NHTSA (owner complaint)
  5. Cal. Code Regs. Tit. 13, § 1968.2 — Malfunction and Diagnostic System Requirements (OBD II) — California Air Resources Board (via Cornell LII)
Last reviewed
Written by
Saurabh K.
Editorial review
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Technician review
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This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error

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