What Does U2195 Mean?
DTC U2195 indicates that the control module received invalid or corrupted data from the Steering Column Lock Module (SCLM) over the SCP (Standard Corporate Protocol, J1850) communication bus. The SCLM is responsible for anti-theft steering column locking functions and communicates its status to the body control module and instrument cluster. This code is set when the data packets received from the SCLM fail checksum validation, contain out-of-range values, or have an incorrect message format.
Common Causes
35%
Faulty Steering Column Lock Module (SCLM) with corrupted internal firmware or failing output driver
30%
Damaged or corroded wiring in the SCP bus harness between the SCLM and the body control module
20%
Poor ground connection at the SCLM causing erratic signal output on the data bus
15%
Body Control Module (BCM) SCP bus receiver circuit malfunction causing data misinterpretation
Diagnostic Steps
1
Step 1: Monitor SCP bus communication using a J1850 protocol analyzer or advanced scan tool capable of bus sniffing — verify that the SCLM is transmitting messages and check for corrupted frames or excessive error counts.
2
Step 2: Inspect the SCP bus wiring harness from the SCLM to the BCM for chafed insulation, corroded pins, or loose connections at both connectors — measure bus voltage levels (should see J1850 VPW pulses between 0V and ~7V or J1850 PWM between 0V and ~5V depending on protocol variant).
3
Step 3: Check SCLM power supply with a multimeter — verify battery voltage (12.2-14.5V) at the SCLM power input pin and less than 0.1V drop at its ground pin relative to battery negative.
4
Step 4: Attempt to reprogram or reflash the SCLM firmware using the manufacturer's diagnostic software — if the module fails to accept programming, replace the SCLM.
5
Step 5: If wiring and SCLM test good, swap-test or replace the BCM and verify that bus communication normalizes with no recurrence of invalid data frames.
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
DTC U2195 indicates that the control module received invalid or corrupted data from the Steering Column Lock Module (SCLM) over the SCP (Standard Corporate Protocol, J1850) communication bus. The SCLM is responsible for anti-theft steering column locking functions and communicates its status to the ...
The most common cause of U2195 (SCP (J1850) Invalid Data from SCLM) is: Faulty Steering Column Lock Module (SCLM) with corrupted internal firmware or failing output driver
Typical repair costs for U2195 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The steering column lock may fail to engage or disengage properly, potentially affecting anti-theft functionality. The vehicle may be drivable but should be diagnosed soon, as unexpected steering lock engagement at speed is a serious safety concern.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U2195 to identify the root cause.
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Quick Info
Category
Network
System
Vehicle Communication Network (SCP/J1850 Bus)
Difficulty
Type
Generic (SAE)
Recommended Tools
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