2022 Toyota 4Runner - Dash Christmas Tree Flashing

[alphaauto]

Hello all. New to this discussion board. I have a client with a 2022 Toyota 4Runner with 26K

At first his issue started once in a while after driving for a long distance and full operating temp. Than it started a lot more times. Then nothing happen for a few weeks. Than now it has been happening more often. Cold weather and moisture seems to make it happen more often. His dash turns into a Christmas tree with lights flashing. BUT the vehicle drives fine and no mechanical issues arise.

Here is the list of codes and lights that come on and flash. But keep in mind they do stop flashing and it acts normal for some a period of time and then they come back. GREMLIN...
B15CB-13 Main antenna circuit open. P1603 Engine stall history, C1241 Too low or high battery volts, C1408 Open or short in rear speed sensor left circuit. ( which i did live monitor when lights flashing intermittent signal was seen for left rear wheel speed sensor). C1416 rear speed sensor left circuit output, C1A50 Brake system malfunction,c1A45 vehicle speed sensor fault, C164D wheel speed sensor malfunction, B1507 open turn signal circuit.....

Disconnected the battery for 1 hour to do a hard reset, did not make any difference.
Checked other forums on line and have heard this is a issue/ People have taken there vehicles to the dealers and they have done numerous type of repairs with no success.
Any ideas or help would be appreciated client does not want to go to the dealership and pay them for no guess repairs.

[ricmorin]

Doing a little research and most of these codes are brake related. Seeing the sensor signal drop out is a huge cue. I do see a few harness replacements in ProDemand. I would concentrate there.

[alphaauto]

Update as of 12-20-25 change out the right and left rear wheel speed sensor and 4 codes are gone. But the rest still remain..