Steering Position Sensor Circuit Range/Performance Problem
The ECM detects a problem with the steering position sensor signal.
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What it means (plain English)
The steering position sensor is sending a signal that's outside of the expected range, which can affect steering response.
What the computer is actually seeing
The electronic control module (ECM) looks for the steering position sensor output voltage to be within 0.5 to 4.5 volts as the steering wheel is turned from lock to lock. If the signal deviates from this range or fluctuates unexpectedly, it triggers a fault code.
What a healthy reading looks like
Expected steering position sensor voltage is between 0.5V (full left) and 4.5V (full right), with a mid-range around 2.5V when centered.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Inspect the wiring harness and connectors associated with the steering position sensor for any visible damage, corrosion, or loose connections. Repair as needed. Decision point: If damaged, fix wiring and retest; if not, proceed to next step.
- 2Using a multimeter, check the voltage output of the steering position sensor while turning the steering wheel. Ensure it varies smoothly from 0.5V to 4.5V. Decision point: If voltage is correct, move to next step; if not, replace the steering position sensor.
- 3Check for any stored codes in the ECM beyond C0673 that may indicate additional issues. If there are related codes, diagnose those first as they may affect the steering position sensor. Decision point: Consider addressing those codes prior to any further diagnosis on C0673.
Common causes
- Faulty steering position sensor
- Wiring issues (open, short, or damaged wires)
- Connector corrosion or poor connections
- ECM software glitches or faults
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive, but steering assist may be impaired, so caution is advised.
Will this code come back after I reset it?
Yes, if the underlying issue isn't fixed, the code will likely return.
Why does this code pair with other codes?
Multiple codes may indicate issues in the same system, often related to sensors or wiring.
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