C1B00 on Nissan: How to Diagnose & Fix
Steering Angle Sensor Fault
1 Nissan model · 1 documented issue · 1 critical · $600-$1,400 repair
C1B00 on Nissan by model: symptoms, diagnosis and fix
Sentras equipped with Nissan's Forward Emergency Braking / Automatic Emergency Braking apply the brakes hard for non-existent obstacles ('phantom braking'). The Bosch radar module behind the front grille (sensor assembly p/n 28438-5UD2A) produces false positives, frequently triggered by overpasses, bridges, railroad tracks, parking-garage walls, and metal grates. Nissan disclosed 1,233 related consumer complaints to NHTSA for the Rogue/Rogue Sport/Sentra, including dozens of minor collisions and injury allegations, and the defect is the subject of class-action litigation.
Common Symptoms
- Sudden hard braking with no obstacle present
- Forward Emergency Braking warning chime and dashboard alert
- Brake activation near bridges, overpasses, railroad tracks, or parking garages
- Vehicle lurches/decelerates unexpectedly at speed
How to Fix
Have the dealer inspect/recalibrate or replace the distance (radar) sensor assembly and apply any FEB-related ECU software updates per TSB. As an interim measure the FEB/AEB system can be switched off via the settings menu when the false activations are dangerous. Document incidents and check for an extended warranty or class-action remedy on the radar module.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (3)
C1B00 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does C1B00 mean on a Nissan?
C1B00 stands for "Steering Angle Sensor Fault." C1B00 is a manufacturer-specific chassis code (commonly Ford) indicating the power steering or stability control module detected a fault with the steering angle (steering wheel position) sensor. This sensor tells stability control and electric power steering where the steering wheel is pointed, which is essential for traction/stability control and assist calibration. When the signal is missing, erratic, or fails plausibility checks, the module sets this code and may disable stability control and reduce or alter power steering assist. Steering still works mechanically, but related driver-assist systems may be limited. On Nissan it is documented across 1 model: Sentra.
What are the most common causes of C1B00?
The most common causes of C1B00 are: Faulty steering angle sensor / clockspring assembly, Calibration not performed after alignment, battery, or steering service, Damaged or corroded sensor wiring/connector, Erratic or implausible sensor signal vs. other inputs, Power steering control module fault, Low system voltage or poor ground, Worn or damaged steering column components. The specific cause varies by vehicle.
How much does it cost to fix C1B00 on a Nissan?
Published repair estimates on Nissan range from $600 to $1,400 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for C1B00 on a different make?
View C1B00 across all makes →Join 600+ people using Au7o to better understand their vehicles.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.