Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLINCOLN2015MKS BASE, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 191 (ELECTRONIC POWER ASSIST STEERING COMPONENT TESTING)
2015 Lincoln MKS Base, AWD
Section 191 (Electronic Power Assist Steering Component Testing)
2015 Lincoln MKS Base, AWDSECTION Section 191 (Electronic Power Assist Steering Component Testing)
WARNING: This page is about a different car, the 2015 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.
- Inspection And Verification
- Known Concerns
- DTC Symptom Index
- DTC Index
- Notes
- DTC B1304: Electronic Power Assisted Steering System
- DTC B1D23: Overheat Sensor
- DTC C100C: Steering Tracking
- DTC C1023: Pull Drift Compensation Limit Exceeded
- DTC C102D: High Friction Inside Power Steering
- DTC C1B00: Steering Angle Sensor
- DTC C200B: Steering Shaft Torque Sensor 1
- DTC C200C: Steering Shaft Torque Sensor 2
- DTC C200D: Motor Rotation Angle Sensor
- DTC P061A: Internal Control Module Torque Performance
- DTC P07AE: Transmission Friction Element G Performance/Stuck Off
- DTC P160C: Control Module Software Performance
- DTC U0001: High Speed CAN Communications Bus
- DTC U0100: Lost Communication with ECM/PCM A
- DTC U0121: Lost Communication with the Anti-lock Brake System (ABS) Control Module
- DTC U0122: Lost Communication with the Vehicle Dynamics Module (VDM)
- DTC U0126: Lost Communication With Steering Angle Sensor Module
- DTC U0140: Lost Communication With Body Control Module
- DTC U0151: Lost Communication With Restraints Control Module
- DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module
- DTC U0159: Lost Communication With Parking Assist Control Module A
- DTC U019B: Lost Communication with Battery Charger Control Module
- DTC U023A: Lost Communication with Image Processing Module A
- DTC U0300: Internal Control Module Software Incompatibility
- DTC U0401: Invalid Data Received from ECM/PCM A
- DTC U0415: Invalid Data Received from ABS Control Module
- DTC U0416: Invalid Data Received from Vehicle Dynamics Control Module
- DTC U0422: Invalid Data Received from Body Control Module
- DTC U0423: Invalid Data Received from Instrument Panel Cluster Control Module
- DTC U0428: Invalid Data Received from the Steering Angle Sensor Module
- DTC U0452: Invalid Data Received From RCM
- DTC U045A: Invalid Data Received From Parking Assist Control Module A
- DTC U053B: Invalid Data Received from Image Processing Module A
- DTC U2011: Motor
- DTC U2100: Initial Configuration Not Complete
- DTC U2101: Control Module Configuration Incompatible
- DTC U3000: Control Module
- DTC U3002: Vehicle Identification Number
- DTC U3003: Battery Voltage
- Symptom Chart - Steering System and NVH
- Notes
- A Module Cannot Communicate With The PSCM
- The PSCM Cannot Communicate With The Diagnostic Scan Tool
- Open PSCM Fuse(s)
- Unable To Replicate Customer's Intermittent Assist Concern During A Test Drive
- Message Center Displays POWER STEERING ASSIST FAULT
- Message Center Displays SERVICE POWER STEERING
- Message Center Displays SERVICE POWER STEERING NOW
- Excessive Steering Wheel Play
- Front End Noise - During Acceleration (Tip-In) Or Deceleration (Tip-Out) May Occur With Braking
- Front End Noise - During Braking
- Front End Noise - Driving Straight On Smooth Roads
- Front End Noise - Over Bumps, Rough Roads, Dips, Depressions Or When Entering A Driveway
- Front End Noise - Turning At Slow Speeds Or During Parking Lot Maneuvers
- Lack of Assist, Inconsistent or Intermittent Assist
- Noise When Turning - Noticed More In The Interior
- Poor Returnability or Sticky Steering
- Steering System Pull, Drift or Wander
- Steering Wheel Vibrates or Resists Turning
- DTC Index
- Pinpoint Tests
- Pinpoint Tests A: PSCM Wire Harness Circuit Integrity Test
- Pinpoint Tests AA: DTC U2100: Initial Configuration Not Complete
- Pinpoint Tests AB: DTC U2100: Steering Column Mounted EPAS - Initial Configuration Not Complete
- Pinpoint Tests AC: Front End Noise - During Bumps, Rough Roads, Dips, Depressions, Entering A Driveway, Turning At Slow Speeds Or During Parking Lot Maneuvers
- Pinpoint Tests AD: Front End Interior Cabin Noise When Turning
- Pinpoint Tests AE: Front End Noise - During Acceleration (Tip-In) Or Deceleration (Tip-Out)
- Pinpoint Tests B: DTCs C1B00, C200B, C200C, U2011, U2200 and U3000: Steering Angle Sensor, Steering Shaft Torque Sensor 1, Steering Shaft Torque Sensor 2, Motor and Control Module - Failure or Erratic
- Pinpoint Tests C: DTC U3000: Control Module - Signal Calculation Failure and Component Internal Failure
- Pinpoint Tests D: DTC U3000: Control Module - Actuator Stuck Open
- Pinpoint Tests E: DTC C1B00: Steering Angle Sensor - Signal Erratic
- Pinpoint Tests F: DTC P07AE: Transmission Friction Element G Performance/Stuck Off - Component Failure
- Pinpoint Tests G: Excessive Steering Wheel Play
- Pinpoint Tests H: Steering System Pull, Drift, Wander or Steering Wheel is Off Center
- Pinpoint Tests I: Poor Returnability or Sticky Steering
- Pinpoint Tests J: Shimmy
- Pinpoint Tests K: Damaged Steering Gear Bellows Boots
- Pinpoint Tests L: Front End Noise - Driving Straight On Smooth Roads
- Pinpoint Tests M: DTCs C1B00, C200B, C200C, C200D, U0300, U2011, U3000 and U3004: Steering Column Mounted EPAS - Steering Angle Sensor, Steering Shaft Torque Sensor 1, Steering Shaft Torque Sensor 2, Motor and Control Module - Failure or Erratic
- Pinpoint Tests N: Steering Column Mounted EPAS - PSCM Wire Harness Circuit Integrity Test
- Pinpoint Tests O: DTC C100C: Steering Column Mounted EPAS - Steering Tracking
- Pinpoint Tests P: DTC C1B00: Steering Column Mounted EPAS - Steering Angle Sensor Calibration Check
- Pinpoint Tests Q: Steering Column Mounted EPAS - Shimmy
- Pinpoint Tests R: Steering Column Mounted EPAS - Excessive Steering Wheel Play
- Pinpoint Tests S: Steering Column Mounted EPAS - Steering System Pull, Drift, Wander or Steering Wheel is Off Center
- Pinpoint Tests T: DTC C1023: Steering Tracking
- Pinpoint Tests U: DTC U0428: Invalid Data Received From The Steering Angle Sensor Module (SASM)
- Pinpoint Tests V: DTC C102D: High Friction Inside Power Steering
- Pinpoint Tests W: DTCs C1B00, C200B and U3000: Steering Angle Sensor, Steering Shaft Torque Sensor 1 and Control Module - Signal or Internal Failure
- Pinpoint Tests X: Poor Returnability or Sticky Steering
- Pinpoint Tests Y: DTCs C200D, P061A, P160C, U2011 and U3000: EPAS Internal Failure DTCs
- Pinpoint Tests Z: DTC U0300: Internal Control Module Software Incompatibility
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.