Audi Power Steering Module Troubleshooting

MOST COMMON POST-REPAIR ISSUE - B2000:49 Will Not Clear

This is the #1 reason modules are returned unnecessarily.

STEP 1 – Confirm the Code

Scan the vehicle.

Verify the only steering module code present is:
B2000:49 – Control Module Fault

If ANY C-Code is present, the issue is in the steering rack motor or torque sensor.
We do not repair C-Codes.

Clear all codes.
Turn ignition OFF for 60 seconds.
Restart vehicle and re-scan.

If B2000:49 returns immediately, continue below.

STEP 2 – Perform Required Steering Calibration

After repair/reprogramming, calibration is required.

Using a capable bi-directional scan tool (VCDS, ODIS, or equivalent):

• Perform Steering Angle Sensor calibration
• Perform Basic Setting for Steering Assist
• Clear codes again

Many vehicles will not clear B2000:49 until calibration is completed.

If calibration fails, the issue is vehicle-side.

STEP 3 – “Dynamic Steering Defective” / “Steering Defective – Do Not Drive”

If the dash displays:
Dynamic steering defective
Steering defective – Do not drive

You must perform a full vehicle scan — not just the PSM.

Important:

The dash message will remain active if ANY steering-related fault is present in the system.

This includes:
• Rack motor faults (C-Codes)
• Torque sensor faults
• Steering angle sensor faults
• ABS/ESC related steering adaptation faults
• Voltage faults

If B2000:49 is present with other codes, address ALL codes.

If assist is working but the message remains, the vehicle may require:
• Steering basic setting
• Steering angle sensor adaptation
• Fault memory reset in related modules

If C-Codes are present, the steering rack itself is faulty.

Do not continue driving if the message states “Do not drive” until the system is properly diagnosed.

STEP 4 – Verify Battery and Charging System

Low voltage is the most common cause of persistent B2000:49 and warning messages.

Battery should measure:
• 12.6V engine OFF
• 13.5–14.7V engine RUNNING

Check:
• Loose battery terminals
• Weak battery
• Voltage drop during cranking

If voltage drops below 11.5V during start-up, faults may re-trigger.

STEP 5 – Check Power and Ground Under Load

Inspect:

• All Steering Assist / EPS fuses
• High-current fuse fitment (no heat damage)
• Ground points near battery and steering rack
• Perform voltage drop test while turning steering wheel

Poor ground or weak power feed can trigger B2000:49 and warning messages.

STEP 6 – Inspect Connector and Harness

Remove connector and inspect for:

• Bent pins
• Pushed-out pins
• Spread terminals
• Corrosion or moisture
• Harness damage near subframe

Even slight terminal tension issues can cause recurring faults.

WHEN TO RETURN THE MODULE

Return the module only if ALL of the following are confirmed:

• Only B2000:49 is present
• No C-Codes
• Calibration completed successfully
• Battery and charging system verified stable
• Power and ground under load confirmed good
• Connector pins and wiring inspected and confirmed good

If assist is functioning but a warning message remains, the issue is typically calibration or another module reporting a fault.