C1730
Reference Voltage Out of Range
C1730 is an OBD-II diagnostic trouble code meaning: Reference Voltage Out of Range. Common causes: short circuit in wiring harness, malfunction of one of the sensors (mass air flow sensor, throttle position sensor, etc.). Estimated repair cost: $56–167.
Symptoms
- Rough engine operation
- Floating idle speed
- Power Loss
- Check Engine Light Illuminates
- Occurrence of associated sensor errors
Causes
- Short circuit in wiring harness
- Malfunction of one of the sensors (mass air flow sensor, throttle position sensor, etc.)
- Problems with the control module (ECU)
- Oxidation of contacts in connectors
- Damaged or corroded wires
How to Fix
- Check the wiring harness for damage and corrosion.
- Check sensor connectors for oxidation
- Turn off the sensors that use the reference voltage one by one to find the faulty one.
- Check the reference voltage at the sensor connectors with a multimeter
- If necessary, replace the faulty sensor or wiring harness
- If the problem persists, check the control module
Related codes
FAQ
What does the C1730 code mean?
C1730 is an OBD-II diagnostic trouble code that indicates: Reference Voltage Out of Range
What causes a C1730 error code?
The most common causes of C1730 include: Short circuit in wiring harness; Malfunction of one of the sensors (mass air flow sensor, throttle position sensor, etc.); Problems with the control module (ECU); Oxidation of contacts in connectors.
How do I fix a C1730 diagnostic trouble code?
To fix C1730: Check the wiring harness for damage and corrosion.. Check sensor connectors for oxidation. Turn off the sensors that use the reference voltage one by one to find the faulty one.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C1730?
Limited driving only, diagnose soon
How much does it cost to fix C1730?
The estimated repair cost for C1730 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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