Code U0153 indicates the vehicle's main computer (PCM) has lost communication with the right side restraints control module. This module is part of the supplemental restraint system (SRS) and monitors side impact sensors to deploy the right side airbags. The fault is typically a wiring, power, or module issue rather than a PCM failure.
Internal failure of the module due to water intrusion, corrosion, or electronic defect is the most common cause.
Open or short circuits in the CAN bus wiring between the PCM and the module, often from chafing, pinched wires, or connector corrosion.
Loose, bent, or corroded pins in the module connector can interrupt communication.
A blown fuse, damaged relay, or poor ground connection can prevent the module from powering up and communicating.
The PCM is seldom the cause; only consider after all other possibilities are ruled out.
It monitors side impact sensors and deploys the right side airbags and seatbelt pretensioners in a collision.
Yes, but the right side airbags may not deploy in a crash, increasing injury risk. Repair is recommended.
No, the PCM is rarely at fault. The problem is usually the side restraints module, its wiring, or power supply. Replacing the PCM without proper diagnosis is a common misdiagnosis.
No, it is a hard fault. The code will remain until the underlying issue is fixed and the code is cleared with a scan tool.