C0730 code meaning
Electric Power Steering Motor Position Sensor Circuit
What C0730 means
Neither the publicly available J2012 lists nor NHTSA bulletins or maker indexes show C0730, so its use is not publicly verifiable. The sensor it names reports the rotor angle of the brushless assist motor, without which the module cannot commutate the phases or run field-oriented current control. Infineon places a rotary magnetic angle sensor on the motor and offers dual-die parts such as TLE5012BD and TLE5x09D so that two independent readings can be compared; NXP lists encoder or resolver processing and rotor position among the core jobs of the steering controller. A circuit fault means the angle signal is missing, shorted or electrically implausible. Without a trustworthy rotor angle the motor cannot be driven safely, so assist is withdrawn, often abruptly, and the steering turns heavy.
C0730 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0730
- Steering assist drops out suddenly, warning lamp on
- Steering jerky or uneven while turning
Common causes of C0730
- Most likelyRotor position sensor in the EPS motor defective
- PossiblePoor connection between sensor and control board
- Less likelySensor magnet loose or misaligned after repair
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Eps motor position sensorEps control module
What each part of C0730 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 30 | The exact fault in that area. |
What to do next
- Note C0730 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C0730
What does C0730 mean?
C0730 means "Electric Power Steering Motor Position Sensor Circuit". Neither the publicly available J2012 lists nor NHTSA bulletins or maker indexes show C0730, so its use is not publicly verifiable. It is a generic code, so it means the same on every make.
Is it safe to drive with C0730?
Drive gently and only to a workshop. With C0730 the car can go into limp mode (reduced power) to protect itself.
Will C0730 fail an emissions test?
C0730 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C0730 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will C0730 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.