Some Subaru Outback owners report experiencing issues indicated by the ABS, traction control, and parking brake lights being illuminated alongside the ER 55 code, which may suggest a malfunction in the ABS system, particularly the ABS motor, after a brake job. These owners note that the ABS light signifies a failure in the self-diagnostic cycle, pointing to potential problems within the Anti-Lock braking system. Additionally, they mention that the warning lights can be triggered by factors such as temporary traction loss, faulty sensors, ABS malfunctions, or broken modules. Inaccurate information from wheel hub sensors can also lead to the ABS light activation. Furthermore, some owners have reported the traction control light being on along with other warning indicators, necessitating diagnostic testing to uncover issues like a faulty valve body or sensor. It is recommended that affected owners have their vehicles inspected by a qualified mechanic for proper diagnosis and resolution of these issues.

Some Subaru Outback owners report experiencing issues with a front passenger caliper sticking, which persists despite repeated rotor and brake replacements. Common symptoms include grinding noises, the vehicle pulling to one side, and burning smells, indicating a stuck or seized caliper. Potential causes for this issue may include the caliper piston failing to release on the pad and insufficient lubrication or brake grease on the caliper piston. To address the problem, some owners find that applying brake grease to the caliper piston, particularly under the boot, can alleviate the sticking. Additionally, if the rotors are in good condition, replacing all caliper slide pins and boots, along with flushing the brake fluid, may be necessary. Addressing these concerns promptly can help resolve the sticking caliper issue effectively.