C1726 on 2003-2017 Ford Expedition — Steering Torque Sensor Signal Invalid
1 vehicles · 1 makes · $200-$1,500 repair
Most Reported On
C1726 is an OBD-II diagnostic trouble code meaning “Steering Torque Sensor Signal Invalid.” C1726 is a steering/chassis code indicating the steering torque sensor is sending an invalid or implausible signal. On electric power steering (EPS) systems, the torque sensor measures how hard you're turning the wheel so the system knows how much assist to provide. When the EPS module receives a signal that's out of range, erratic, or doesn't agree with its internal checks, it flags the data as invalid. It generally results in reduced or lost power-steering assist (heavier steering), with a steering or EPS warning light, even though the car remains steerable. This code is most commonly reported on 2003-2017 Ford Expedition, with repair costs ranging from $200 to $1,500.
Common Causes
Typical Repair Cost
Based on 2 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose C1726, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
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BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
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- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
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Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
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- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does C1726 mean?
C1726 stands for "Steering Torque Sensor Signal Invalid." C1726 is a steering/chassis code indicating the steering torque sensor is sending an invalid or implausible signal. On electric power steering (EPS) systems, the torque sensor measures how hard you're turning the wheel so the system knows how much assist to provide. When the EPS module receives a signal that's out of range, erratic, or doesn't agree with its internal checks, it flags the data as invalid. It generally results in reduced or lost power-steering assist (heavier steering), with a steering or EPS warning light, even though the car remains steerable.
What are the most common causes of C1726?
The most common causes of C1726 are: Faulty steering torque sensor, Wiring or connector fault in the torque sensor circuit, Loss of or unstable sensor reference/supply voltage, Corrosion or moisture in the steering column connectors, Torque sensor not calibrated/initialized after service, Internal EPS module fault, Low battery voltage affecting sensor operation. The specific cause varies by vehicle.
How much does it cost to fix C1726?
Repair costs for C1726 range from $200 to $1,500, depending on the vehicle and root cause.
Which vehicles are affected by C1726?
Au7o has documented C1726 across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.