U2689 Code:

OBD-II Diagnostic Network (U) Trouble Code

Possible Cause

The cause of U2689 code is about if recent transmission repairs have been performed, suspect that the range sensor was not readjusted properly (if so equipped). Sensor retaining bolts should always be installed using thread locking compound to ensure proper torque longevity.

Common Symptoms

  1. It is a message based protocol originally designed for automotive use
  2. Unlike other diagnostic codes, this type of code can sometimes be best left to a professional simply because of the bulk of circuitry involved
  3. An output speed sensor is used to provide the PCM with a transmission output speed signal
  4. Typical causes of low pump pressure include clogged hydraulic passages, a defective pump, faulty shift solenoids, or a faulty electronic pressure regulator

Similar Problems

Auxiliary Emission Controls
TP Sensor Learn Not Complete
TFP Valve Position Switch-Drive Without Drive Ratio

U2689 Troubleshooting

There will also be noise coming from the turning radiator fan and the belt that turn the fan blade. There are a multiple of other belt driven devices under the hood. An engine pulley is mounted to the engine of an automobile and drives all belts. Your car probably has a serpentine belt which is a continuous belt used to drive multiple peripheral devices. U2689 OBD2 may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.

How to turn off U2689 check engine light ?

There are two ways to turn off the check engine light:

A repair technician can do so once repairs have been made.
The OBD II can automatically turn it off when it fails to detect the problem after several diagnostic cycles.

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