Code C1237, stability and hill descent controls lightning?

Hi,

Before I confirm my thoughts, I need to know which engine the vehicle has. There are three different ones that were available. See pic 1 below and let me know which you have.

Now, the code, in general, deals with the ABS control module (HECU, hydraulic electronic control unit). This code may be specific to the pressure sensor which is integral to the module. If that is the case, the HECU will need to be replaced.

Please confirm the engine size for me.

Take care,

Joe

See pic below.

Can you please double check the code number? Code C123702 does not exist in the standard OBD-II (On-Board Diagnostics) code list.

I see, so the codes are C1237 and B1236:

The C1237 and B1236 codes you mentioned are specific to the Anti-Lock Brake System (ABS) and the Stability Control System on your vehicle. Here's what each code means:

C1237 - Speed Wheel Right Rear Input Signal Missing
This code indicates that there is a problem with the ABS system's speed sensor on the right rear wheel. The ABS system relies on speed sensors at each wheel to monitor individual wheel speeds and ensure proper braking and stability control.

Possible causes of C1237:

Faulty or damaged ABS speed sensor on the right rear wheel.
Wiring issues or poor connections related to the right rear ABS speed sensor.
The ABS control module may be malfunctioning.
B1236 - Mirror Vertical Switch Circuit Short to Battery
This code is related to the mirror vertical switch, typically found in power mirror systems. It indicates that there is a short circuit to the battery in the circuit of the mirror's vertical switch.

Possible causes of B1236:

Damaged or faulty mirror vertical switch.
Wiring problem, such as a short circuit between the mirror vertical switch and the battery.

So, I would replace the right rear wheel speed sensor and then clear the codes. Check out the images (below). Please let us know how it goes.

Here is one on Amazon with the hub bearing for $51.00:

https://amzn.to/3qv6HR1

Please let us know how it goes.

Yes, that can be a problem, it looks like the wiring is damaged as well. Here is a guide to help test the connections and the traction control and BAS wiring diagrams so you can see how the system works:

https://www.2carpros.com/articles/how-to-check-wiring

It looks like there is a set up procedure that must be done when changing out the ABS module. Check out the images (below). Please let us know what happens.

Only the dealer can tell you that. I don't have that information, sorry.