Power Steering Control Module Request Signal
The power steering control module is not receiving the correct request signal.
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What it means (plain English)
The power steering control module isn't getting the right command from other systems, leading to possible steering issues.
What the computer is actually seeing
The power steering control module expects a voltage signal that indicates how much steering assist is needed. If the signal is too low or missing, it sets this code.
What a healthy reading looks like
Voltage should be between 0.5V to 4.5V depending on steering angle and load conditions.
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.
- 11. Check wiring and connectors for damage or corrosion, focusing on the power steering control module and steering angle sensor.
- 22. Measure voltage at the steering angle sensor; it should be around 0.5V to 4.5V. If not, repair the wiring or replace the sensor if faulty.
- 33. Inspect the power steering control module for signs of damage; check for software updates or recalls.
- 44. If connections and sensor voltage are normal, test the power steering control module by swapping with a known good module if available.
Common causes
- Bad wiring or connectors leading to signal loss
- Faulty power steering control module
- Issues with the steering angle sensor
- Software bugs in the vehicle's control modules
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to avoid driving if you notice steering difficulties, as it could affect handling.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code often pair with C1616?
C1616 indicates a steering angle sensor fault, which may lead to communication problems with the power steering control module.
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