P1698 - FAULT CODE - OBD2

POST UPDATED IN February, 2023

P1698 Code failures by brands

P1698 CHRYSLER, DODGE, JEEP: PCM FAULT NO CCD MESSAGE FROM TCM

Description of DTC code P1698

The PCM (Powertrain Control Module) is the controller that monitors and regulates the engine operation. On the other hand, the TCM (Transmission Control Module) also regulates the performance of the car’s transmission. Both control modules have constant communication so that the systems regulated by them can work together.

Both the TCM and the PCM have several sensors and actuators with which they can monitor the right performance of their systems. All communication is sent and received through the communication circuit known as the CAN bus network (Control Area Network).

The P1698 OBD2 diagnostic code is a manufacturer-specific code that applies to Chrysler, Dodge, Jeep brands to indicate that the Powertrain Control Module has been unable to communicate with the Transmission Control Module.

Symptoms of fault code P1698

  • Check Engine light is ON.
  • Problems starting the vehicle.
  • Difficulties when changing gears.

Causes of OBD2 P1698

Reasons to set the P1698 OBDII fault code:

  • The battery may have an excessively low voltage.
  • The Powertrain Control Module cables or connectors may be in poor condition.
  • The PCM electrical connections may be faulty.
  • The PCM may be defective.

Possible solutions of the DTC code P1698

To solve the DTC P1698 OBD2, take into account these suggestions:

  • Consult the TSBs.
  • Check if any additional DTCs are set in addition to P1698. If you find them and these codes point to specific control module faults, run diagnostics on them.
  • Measure the battery charging voltage. This should be at least 75 volts unless there are other specifications made by the manufacturer. Below this voltage, a full charge of the battery is required.
  • Check the condition of the cables and connectors on the Powertrain Control Module. If you discover common deficiencies, make corrections if necessary.
  • Check the PCM connections for any deficiencies that could result in a short or open circuit. If so, make repairs if necessary.
  • If after performing the above checks you still get the code P1698, suspect a faulty Before carrying out repairs to the PCM, contact a specialist service center.

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