ABS code 'C1245-Acceleration Sensor Output'-sensor location?

[Teearohwhy]

When I start driving my car at low speeds (under 15-20 mph), my 'Low Trac' light comes on and stays on until I hit about 20 mph at which point the traction control automatically shuts off and my ABS light comes on. When I stay at low speeds initially after startup and hit the brake pedal it feels as if the ABS is engaging constantly. Once the 'Trac Off' and 'ABS' lights come on after I hit 20mph I no longer feel the pulse of the ABS. Does anyone know where this sensor is located and how I can replace it?

[redzmonte]

Googled the code and found this... "C1245 ABS Outlet Valve Coil LR Circuit Short To Ground"

it sounds like a Wheel speed sensor and according to the code it appears to be the LR sensor.. IIRC the wheel speed sensors are part of the Hub's on these cars. so I would inspect the connection of the rear wheel speed sensors and make sure they are not disconnected or damaged wires... but most likly it will need a sensor/bearing.

S

[Archon]

This is GM's information regarding the code.

DTC C1245
Circuit Description

The Tire Pressure Monitor (TPM) system uses the Electronic Brake Control Module (EBCM), and the ABS wheel speed sensor inputs to monitor tire pressure. The EBCM contains software to calculate relative tire pressure differences. The EBCM monitors the ABS wheel speed sensor inputs, which will all be the same as the learned calibration if the tire pressures stay the same. If the pressure increases or decreases in one tire so too will that tire's circumference and radius, which causes that wheel speed sensor input to change. The EBCM recognizes this change in wheel speed as a tire pressure condition.
Conditions for Running the DTC

No ABS or TCS malfunctions present.
The calibration process is at least partially complete.
The vehicle speed is between 24-145 km/h (15-90 mph).

Conditions for Setting the DTC

The EBCM detects a tire pressure difference in one tire of 69 kPa (10 psi) higher or lower than the other three.
Loss of, or low system battery voltage.

Actions Taken When the DTC Sets

A DTC C1245 is stored in memory.
The systems monitor displays the TIRE PRESS indicator, or the DIC displays the CHECK TIRE PRESSURE warning message, if equipped.
The TPM system is disabled.

Conditions for Clearing the DTC

A current DTC will clear when the TPM system has been reset.
A history DTC will clear after 100 consecutive malfunction free ignition cycles and the TPM system has been reset.
Using the scan tool

Diagnostic Aids

Any of the following conditions can also cause this DTC to set.

The tire pressures have been adjusted without resetting the TPM system.
The tires have been rotated or replaced without resetting the TPM system.
Rough or slippery road conditions such as dirt, gravel, wet, snow, or ice.
The tires are out of balance.
The suspension is out of alignment.