U0121 FORD code

Conclusion. In conclusion, the U0121 code is a communication error between the ABS Control Module and other control modules on the vehicle. It may be caused by a faulty ABS Control Module, wiring harness, or related circuits. Check for obvious damaged components and repair as necessary.

How do I fix code U0121?

How to repair the U0121 engine code

  1. Address additional DTCs that may be triggered.
  2. Deploy a ​​digital multimeter (DMM) to test the CAN bus.
  3. Use a scan tool to attempt communication with the ABS.
  4. Check ABS circuits with a DMM.
  5. Attempt to reprogram the ABS to verify if there’s a software issue.
  6. Replace the ABS.

What is diagnostic code U0121?

What does OBD-II fault code U0121 mean? Code U0121 stands for Lost Communication with Anti-lock Brake System Module. Anti-lock brakes are required on all modern vehicles. The antilock braking system (ABS) prevents wheel lockup by modulating the brakes in an emergency situation.

What does lost communication with body control module mean?

U0140 is a generic diagnostic trouble code (DTC) that stands for “Lost Communication With Body Control Module.” This code generally means that the BCM isn’t properly transmitting or receiving signals. A U0140 code can have a wide variety of indications.

What causes ABS control module to fail?

The most common ABS problems occur when sensors become contaminated with debris or metal shavings. Malfunctions also occur when sensor wiring becomes damaged, resulting in intermittent or no continuity.

Where is the ABS control module located?

ABS Control Module Location

The ABS control module is found in the engine compartment of most vehicles. However, it can also be found on the driver’s side frame rail in a few models. You may need to lift the vehicle to find the ABS control module. It could also be located under plastic panels or covers.

How do you check ABS brake module?

Zitat von Youtube: Test component activation and now these things for the returning pump this is the break part. But before we go there okay check you can check your whole brake module guys bring with the little valves.

How do I fix U0073 code?

Fixing a U0073 engine code is best left to the professionals. Repairs may involve diagnosing the various modules in your vehicle and replacing communication wires between modules and the CAN bus.

What is fault code U0401?

Code U0401 stands for Invalid Data Received from ECM/PCM. The engine control module (or powertrain control module) is the computer than manages engine operation. The engine control module (ECM) receives input from sensors throughout the vehicle.

Can you reset a body control module?

To complete the body control module reset, you will have to reconnect the battery. This reestablishes the electrical supply through the BCM as well as other electrical peripherals of the vehicle. Once the battery is reconnected, check if the problems that made you perform the body control reset have been rectified.

How much does it cost to replace a body control module?

The average cost of body control module replacement ranges from $300-$600.