Front Sensor Supply Voltage Circuit Low
The front sensor is not getting enough voltage from the circuit.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The sensor in the front of your vehicle isn't getting enough power, which can lead to issues with things like stability control or traction control.
What the computer is actually seeing
The vehicle's computer expects to see between 4.5V and 5.5V at the front sensor connector but detects a lower voltage than this threshold.
What a healthy reading looks like
Voltage supply at front sensor should be between 4.5V and 5.5V; anything below 4.5V is considered low.
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 the wiring and connector for damage or corrosion. Make sure they are clean and secure. If damaged, repair or replace before testing further.
- 22. Measure the voltage at the front sensor connector with a multimeter while the key is in the ON position. Expected voltage is between 4.5V and 5.5V.
- 33. If voltage is low (below 4.5V), check the power supply circuit back to the vehicle's fuse box. Look for bad fuses or shorted wires.
- 44. If voltage is good at the connector, unplug the sensor and test its resistance. Replace the sensor if resistance is out of specs as per manufacturer guidelines (typically 1-5 ohms).
- 55. If all checks pass but the code remains, inspect the ground connection for the sensor circuit. Repair any bad grounds.
Common causes
- Damaged wiring or connector
- Corroded terminals
- Faulty sensor
- Poor ground connection
- Blown fuse for sensor circuit
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code on?
It's safe to drive, but you may notice decreased stability or traction control performance, so fix it soon.
Will this code come back if I clear it?
If the underlying issue isn't fixed, yes, it will likely come back after reset.
Why does this code pair with C1425 often?
C1425 relates to the sensor supply circuit, and a low voltage issue often affects multiple aspects of its operation.
Working a real vehicle right now?
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