Check VSC system, traction control light on, check engine light on with multiple codes?

ADZY82

MEMBER
2007 TOYOTA CAMRY
3.5L
V6
2WD
AUTOMATIC
221,000 MILES

I connected the OBD2 scan tool on and it give me the codes:
C1201
C0365
C1241
C1237
I cleared the codes, and I fixed a broken battery terminal and then it was okay for an entire day, then the next day while I was driving the car started running rough and car shaking. Then check VSC system come back on put obd2 back on and now the code P0420 Catalyst system efficiency below threshold bank 1. Can you please help me with this issue? Thanks

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
43,032 POSTS

I would start with the replacement of the rear wheel speed sensor and then clear the codes to see what happens. I included instructions in the images below. I would replace the bearing hub and sensor together because the bearing can go out causing the sensor not to work.

C1201: This code indicates a problem with the Engine Control Module (ECM) communication circuit.

C0365: This code relates to a problem with the traction control input signal.

C1241: This code points to a problem with the ABS control system.

C1237: This code indicates a problem with a rear wheel speed sensor.

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

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