Quick answer: The P0182 code indicates that the Powertrain Control Module has detected an abnormally low voltage signal from the Fuel Temperature Sensor A circuit. This affects the fuel delivery system and engine management. It is a moderate priority issue that requires attention soon to prevent poor fuel economy and rough running.
Seeing a check engine light on your dashboard can be frustrating, especially when an OBD-II scanner returns a specific code like P0182. In this guide, we will break down what this code means, the symptoms to watch for, and the most logical steps to diagnose and resolve the underlying issue without wasting money.
What Does P0182 Mean?
The diagnostic trouble code P0182 stands for Fuel Temperature Sensor “A” Circuit Low Input. Your vehicle’s fuel system includes a temperature sensor that monitors how hot or cold the fuel is before it enters the engine. The Powertrain Control Module relies on this data to adjust air-fuel ratios and ignition timing for optimal combustion. When the sensor voltage drops below the minimum expected threshold-usually under 0.2 volts-for a set period, the computer triggers the P0182 code and illuminates the check engine light.
Symptoms
- Check Engine Light illuminated on the dashboard
- Slight decrease in fuel economy
- Engine running slightly rough when cold starting
- Occasional hard starting in extreme weather conditions
- Engine hesitation during acceleration in rare cases
Possible Causes
Warning: The most common mistake drivers and amateur mechanics make is immediately replacing the fuel temperature sensor itself without testing the wiring and connections first.
- Corroded, loose, or damaged wiring harness leading to the fuel temperature sensor
- Faulty electrical connector at the fuel temperature sensor
- Defective Fuel Temperature Sensor A
- Low fuel rail pressure affecting sensor readings in rare setups
- Internal failure or software glitch in the Powertrain Control Module
Check These Yourself Before Visiting a Mechanic
- Locate your fuel temperature sensor, usually found on the fuel rail or fuel injection pump, and inspect the wiring plug for loose pins or corrosion.
- Clear the code with an OBD-II scanner and take a short test drive to see if the fault returns immediately or was just a temporary glitch.
- Check your vehicle battery and charging system, as low system voltage can sometimes trigger false low-voltage sensor codes.
How to Fix It
- Inspect the wiring harness and electrical connector for physical damage, fraying, or moisture intrusion, then repair or clean as needed.
- Measure the resistance of the fuel temperature sensor using a digital multimeter and compare your readings against factory specifications for your specific engine.
- Replace the fuel temperature sensor if internal resistance values fall outside the acceptable range.
- Trace the circuit back to the Powertrain Control Module to check for continuity if the sensor and wiring check out fine.
Estimated Repair Costs (2026)
| Job | Parts ($) | Labor ($) |
|---|---|---|
| Wiring Repair / Terminal Cleaning | 10 – 40 | 70 – 150 |
| Fuel Temperature Sensor Replacement | 30 – 90 | 100 – 200 |
| Powertrain Control Module Reprogramming | 0 – 0 | 150 – 300 |
Note: these are 2026 estimates in US dollars; costs vary by make and model.
Frequently Asked Questions
Can I drive with the P0182 code?
Yes, you can usually drive short distances with a P0182 code because your vehicle can run using default fallback fuel tables. However, you should address it promptly to avoid poor fuel economy and potential emissions test failure.
How do I clear the P0182 code?
You can clear the code using an OBD-II scan tool plugged into your vehicle’s diagnostic port under the dashboard. Keep in mind that if the underlying mechanical or electrical fault is not fixed, the code will return.
Will cleaning the electrical connector fix the code?
If the issue is caused by moisture or corrosion inside the plug, cleaning it with electrical contact cleaner and securing the locking tab will often resolve the problem permanently without needing new parts.