Service activ handling system, has been diagnosed with the car, then error code C0196 and C0186, what could be the reason for this ???? Service activ handling system, has been diagnosed with the car, then error code C0196 and C0186, what could be the reason for this ????

 

Search the error codes, see what comes up

 

The error codes that come's up is C0196 AND C0186

 

Looks like a trip to the dealer/mechanic might be in order.

 

Looks like can't do much checking without a scan tool. Both DTCs reference the yaw rate/lateral accelerometer sensor which is located in the center console behind the HVAC control. Could take a chance and get a $20 used one off ebay and hope that fixes it. New one is couple hundred....search GM 10307709

Circuit Description
The Vehicle Stability Enhancement System (VSES) is activated by the electronic brake control module (EBCM) calculating the desired yaw rate and comparing it to the actual yaw rate input. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM will attempt to correct the vehicle's yaw motion by applying differential braking to the left or right front wheel.

The amount of differential braking applied to the left or right front wheel is based on both the yaw rate error and side slip rate error. The side slip rate error is a function of the lateral acceleration minus the product of the yaw rate and vehicle speed. The yaw rate error and side slip rate error are combined to produce the total delta velocity error. When the delta velocity error becomes too large and the VSES system activates, the drivers steering inputs combined with the differential braking will attempt to bring the delta velocity error toward zero.

The VSES activations generally occur during aggressive driving, in the turns or bumpy roads without much use of the accelerator pedal. When braking during VSES activation, the brake pedal will feel different than the Antilock Brake System (ABS) pedal pulsation. The brake pedal pulsates at a higher frequency during VSES activation.

C0186
Conditions for Setting the DTC
C0186 00
One of the following conditions exist:

• The lateral accelerometer sensor input voltage is less than 0.15 volts.

• The lateral accelerometer sensor input voltage is greater than 4.85 volts for 0.03 seconds.

C0186 08
The lateral accelerometer voltage does not increase at least 0.5 volts during the lateral accelerometer sensor self test.

C0186 09
The lateral jerk exceeds 11 g per second twice within 0.2 seconds.

C0186 19
The lateral acceleration is greater than 0.5 g for more than 1 second.

C0186 1A
Both of the following conditions exist:

• The compensated bias value of the lateral accelerometer sensor is greater than 0.3 g.

• The yaw rate is centered.

C0186 52
The slip rate error exceeds 0.5 g 60 times within one drive cycle.

C0196
Conditions for Setting the DTC
C0196 00
One of the following conditions exist:

• The yaw rate sensor input voltage is less than 0.15 volts.

• The yaw rate sensor input voltage is greater than 4.85 volts for 1 seconds.

C0196 09
The yaw rate input changes by more than 390 degrees/second per second.

C0196 1A
The yaw rate bias exceeds 7 degrees/second.

C0196 52
The yaw rate error is greater than 5 degrees/second more than 30 times in one drive cycle.

 

Tanks guys, for many good tips 😃👍