C1B00: Steering Angle Sensor Fault
6 vehicles · 2 makes · $250-$3,500 repair
Most Reported On
C1B00 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2015-2020 Ford Transit, 2012-2016 Ford Focus (S, SE, SEL, Titanium, ST, Electric), and 2011-2014 Ford Mustang, plus 3 other vehicles, with repair costs ranging from $250 to $3,500.
Common Causes
Typical Repair Cost
Based on 6 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
C1B00 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
Vehicles Affected (6)
Electric Power Steering (EPAS) Assist Loss / Steering Fault Warnings
Electric Power Assist Steering (EPAS) Rack/Motor-Sensor Failure - "Power Steering Assist Fault" Message
2011-2014 3.7L V6 Electric Power Steering Assist Failure
Electric Power Steering Assist Loss and Steering Rack Failure
Electric Power Steering (EPAS) Assist Fault — Sudden Loss of Power Steering Assist
FAQ
What does C1B00 mean?
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.
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?
Repair costs for C1B00 range from $250 to $3,500, depending on the vehicle and root cause.
Which vehicles are affected by C1B00?
Au7o has documented C1B00 across 6 vehicle models from 2 manufacturers: Ford, Nissan.
Sources (12)
- RecallNHTSA Campaign 24V542 - Transit Trail EPAS Ground
- ForumPower steering assist fault | Focus Fanatics Forum
- ForumSudden and complete steering failure | Focus Fanatics Forum
- articleNHTSA Recall 15V340 - Ford, Failure of Electric Power Steering Assist (same motor sensor defect, Focus excluded)
- articleFord Steering Problems Come into Focus - Safety Research & Strategies
- article2012 Ford Focus Power Steering Failure: 122 Complaints - CarComplaints
- RecallNHTSA Campaigns 24V493 and 25V096 / Ford 24S44 and 25S11
- articleNissan Emergency Braking Malfunction Lawsuit (Sentra/Rogue FEB) - Gibbs Law Group
- articleCenter for Auto Safety Asks Nissan to Brake Check Itself - The Truth About Cars
- articleBroken Sensor Stops Automatic Emergency Braking on Nissan Sentra, Altima, Armada & Murano
- NHTSANHTSA Recall API - 2022 Ford Bronco (Campaign 23V155000)
- NHTSANHTSA Manufacturer Communications Data Corpus
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.