What Does B2351 Mean?
DTC B2351 indicates that the Body Control Module (BCM) has detected an electrical fault in the steering column switch circuit. This code affects the multifunction switch assembly on the steering column, which typically controls turn signals, headlights, windshield wipers, cruise control, and other steering column-mounted functions. The BCM has identified an open circuit, short circuit, excessive resistance, or communication failure within this switch circuit.
Common Causes
45%
Faulty multifunction switch assembly or individual switch component within the steering column
30%
Damaged, corroded, or loose wiring harness connector at the steering column switch
15%
Broken or frayed wiring in the steering column harness due to column movement over time
10%
Body Control Module (BCM) internal fault or poor BCM ground connection
Diagnostic Steps
1
Step 1: Perform a visual inspection of the steering column switch connectors for corrosion, bent pins, water intrusion, or loose connections. Disconnect and inspect all connectors leading to the multifunction switch assembly.
2
Step 2: Using a digital multimeter, check for power and ground at the steering column switch connector with ignition on. Verify voltage supply matches manufacturer specifications (typically 5V reference or battery voltage depending on switch type).
3
Step 3: Test the resistance of individual switch circuits using the multimeter while activating each function (turn signals, wipers, etc.). Compare readings to factory specifications to identify open or shorted circuits.
4
Step 4: Inspect the wiring harness within the steering column for chafing, breaks, or damage by carefully removing column covers. Pay special attention to wires near moving pivot points.
5
Step 5: If wiring and connections are intact, test the multifunction switch assembly by substituting with a known-good component or performing continuity tests on each switch position per service manual procedures.
6
Step 6: Clear the code and perform a functional test of all steering column switch operations. Monitor live data for proper switch signal recognition by the BCM to confirm repair.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
DTC B2351 indicates that the Body Control Module (BCM) has detected an electrical fault in the steering column switch circuit. This code affects the multifunction switch assembly on the steering column, which typically controls turn signals, headlights, windshield wipers, cruise control, and other s...
The most common cause of B2351 (Steering Column Switch Circuit Failure) is: Faulty multifunction switch assembly or individual switch component within the steering column
Typical repair costs for B2351 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle can be driven with caution, but critical safety features like turn signals, headlights, or windshield wipers may not function properly, creating significant safety hazards in traffic or poor weather conditions. Repair should be completed promptly to maintain safe vehicle operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2351 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Electrical Systems
Difficulty
Type
Generic (SAE)
Recommended Tools
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