Sorry, we only handle one problem per thread please start anew question for the battery post issue.
C0040 is associated with the right-front wheel speed sensor circuit.
C0550 generally indicates an internal EBCM/ABS control module malfunction.
I would check the bearing hub which holds the sensor and can cause both problems. IF the hub and sensor are okay I would replace the ABS control module. Check out the images (below). Let me know how it goes
Images (Click to enlarge)
Jul 9, 2026 at 4:16 PM