C1219 Steering Angle Sensor Erratic Performance

C1219 code - Steering angle sensor erratic performance, continuous monitoring. Set condition code C1219, if the Antilock Brake System (ABS) Module detects that the calculated steering wheel angle and the actual steering angle disagree.

C1091 ABS Brake Lamp Control Circuit High

Possible causes code C1091 ABS Brake Lamp Control Circuit High

  • Vehicle damage.
  • Steering column/intermediate shaft damage.
  • Steering angle sensor loose.
  • Clockspring (SAS).

How to fix diagnose code C1091 ABS Brake Lamp Control Circuit High?

Step 1. Perform test drive and verify DTC is still active

If present, diagnose and repair DTC C123F-Steering angle sensor comparative performance before diagnosing this DTC.
Turn the ignition on, with the scan tool, read and record DTCs. With the scan tool, read and record environmental data to help identify the conditions in which the DTC was set. perform the ECU initialization with drive test (See ABS verification test).

Warning: To avoid possible serious or fatal injury, check brake capability is available before road testing.

Test drive the vehicle by driving straight at a velocity between 10 and 25 km/hr (6 and 15 mph) for 1 minute. Park the vehicle, turn the steering wheel from stop to stop. With the scan tool, read ABS DTCs.

Does this DTC reset?

YES, go to step 2.
NO, the condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.

Step 2. Check steering angle sensor output

Start the engine, center the steering wheel. With the scan tool, read the steering angle sensor position.

Is the steering angle sensor position within ±15°?

YES, go to step 3.
NO, go to step 4.

Step 3. Inspect vehicle, steering column, and intermediate shaft for damage

If possible, check vehicle repair history for collision damage. ABS Module must be re-initialized after repair.
Turn the ignition off, inspect the vehicle for damage causing tracking problems. Inpect the steering column and intermediate shaft for damage.

Were any problems found?

YES, repair as necessary and clear offsets by initializing ECU with wheels pointing straight ahead. Perform the ABS verification test.

NO, go to step 4.

Step 4. Check clockspring (SAS) installation

To avoid serious or fatal injury on vehicles equipped with airbags, disable the supplemental restraint system (SRS) before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative cable, the wait two minutes for the system capacitor to discharge before performing further diagnosing or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidential airbag deployment.

Proper clockspring (SAS) installation is crusial for proper operation.
Verify that the clockspring (SAS) is properly installed.

Is the steering anglle sensor properly installed?

YES, replace the clockspring (SAS). Perform the ABS verification test.
NO, repair as necessary and clear offsets by initializing ECU with wheel pointing straight ahead.

Test complete for code C1219 Steering Angle Sensor Erratic Performance.

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