[SOLVED] Jeep P1698 Code: Pcm Issue No Tcm Communication Fix

The OBD code P1698 for Jeep indicates a communication error between the Transmission Control Module (TCM) and Powertrain Control Module (PCM).

Symptoms include the Engine Light being ON.

Causes may include a faulty TCM, open/shorted TCM harness, poor electrical connection, faulty PCM, or low battery voltage.

This issue is serious as it affects transmission operation.

A possible fix is to inspect and repair any damaged wiring or connectors between the TCM and PCM.

Repair Importance Level	10.0 (Out of 10)
Estimated Repair Time	Approximately 1.0 hour
Repair Difficulty Level	10.0 (Out of 10)

Symptoms of the Jeep p1698 OBD Code

The Jeep is experiencing issues with the ECM communication circuit, indicated by fault code P1698.

Symptoms: Engine Light ON.
Intermittent starting issues.
Loss of communication with the TCM (Transmission Control Module).
Transmission shifting problems.
Engine stalling.
Rough idle.

Causes of the Jeep p1698 OBD Code

Do you know you can clear most fault codes—but some could mean serious danger? Don’t take chances with your safety or your family’s safety. This budget-friendly car scanner makes it easy to clear fault codes in seconds while showing you exactly what’s wrong. Plug it in, connect to your Android or iOS phone, and instantly check live data. You’ll know if it’s a minor issue you can clear or something serious that needs attention—so you can drive safely and stress-free. (Today’s Deal)

Possible reasons for Jeep fault code P1698 include issues with the transmission control module or wiring faults.

P1698 can be caused by a faulty Transmission Control Module (TCM).
A Transmission Control Module harness that is open or shorted.
A Transmission Control Module circuit with poor electrical connection.
A faulty Powertrain Control Module (PCM).
Low battery voltage.

Fixing Jeep Error Code p1698 Step By Step

Address the wiring and connections related to the transmission control module for Jeep fault code P1698.

To fix the Jeep OBDII code P1698, start by reviewing the possible causes mentioned above.
Visually examine the wiring harness and connectors related to the transmission control module (TCM).
Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
Test the TCM for proper operation and communication.
Reset the TCM or reprogram it if necessary.
Replace the TCM if all other steps do not resolve the issue.

Cost Of Fixing Jeep p1698 Fault Code

Diagnosing and repairing Jeep fault code P1698 may involve inspecting wiring, connectors, and the transmission control module.

The cost to diagnose and fix a Jeep OBD code P1698 typically ranges from $75 to $150, based on a 1. 0hour estimated repair time.

Factors like shop rates and complexity can affect the final cost.

That fault code is a turning point. If repair costs are climbing and your current loan feels like it’s holding you back, this is the time to plan ahead. The free Car Loan Payment Tracker helps you see how quickly you can pay off what’s left—and start preparing, with confidence, for your dream car.

Details of the Jeep p1698 OBD Code

The Jeep fault code P1698 indicates a problem with the PCM communication circuit.

OBD code P1698 for Jeep vehicles indicates a problem with the PCM (Powertrain Control Module) communication bus.

This code is triggered when there is a loss of communication between the PCM and the TCM (Transmission Control Module).

The PCM uses the communication bus to exchange data with other modules in the vehicle, and when this communication is interrupted, the P1698 code is set.

This can lead to issues with transmission shifting, engine performance, and other vehicle functions.

Mechanic’s Tech Notes

Detailed information on the Jeep fault code P1698 related to no CCD messages received from TCM.

To diagnose and fix OBDII code P1698 in a Jeep, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.

Verify TCM communication over the Controller Area Network (CAN) using a scan tool.

If the TCM does not respond, reprogramming or reflashing may be necessary.

Visually inspect the wiring harness and connectors for any damage, and check connector pins for signs of being broken, bent, pushed out, or corroded.

This thorough inspection can help identify and resolve issues related to the P1698 fault code.

FAQ

1. What does OBD code P1698 mean in a Jeep vehicle?

OBD code P1698 in a Jeep means a fault with the Transmission Control Module (TCM). Check TCM, wiring, connectors, and PCM for issues.

2. What are the common symptoms associated with fault code P1698 in a Jeep?

Common symptoms of fault code P1698 in a Jeep include Engine Light ON, caused by issues like faulty TCM, TCM harness problems, or low battery voltage. Fix involves inspecting wiring and connectors.

3. How can I diagnose and repair OBD code P1698 in my Jeep vehicle?

Diagnose and repair OBD code P1698 in a Jeep by checking TCM, harness, and PCM. Inspect wiring for damage or poor connections.

Wrap Up

If your Jeep is displaying OBD code P1698, you may experience issues with the transmission control module (TCM) communication circuit.

This could be caused by faulty sensors, damaged wiring, or poor connections within the TCM system.

To address Jeep OBD code P1698, start by inspecting the wiring harness and connectors related to the TCM.

Check for any signs of wear, corrosion, or loose connections.

Test the TCM and related sensors for proper functionality and replace any components that are found to be faulty.