What does the P0182 code mean?
The P0182 is a generic OBD-II powertrain trouble code. Its official definition is “Fuel Temperature Sensor A Circuit Low Input“.
When you connect a vehicle code reader to the diagnostic link connector, the powertrain control module (PCM) reports P0182 if it detects that the voltage signal from the fuel temperature sensor A is lower than the expected range (typically below 0.2 V). The fuel temperature sensor is a thermistor that changes resistance with temperature. As fuel temperature increases, resistance decreases, causing the signal voltage to drop. A low input voltage indicates either a very high fuel temperature (above 250 °F) or a short to ground in the sensor circuit. Using a professional car scanner with live data allows technicians to view the raw fuel temperature value and compare it to ambient temperature. An obd2 scanner can also display the sensor voltage and check for related codes. Unlike codes like P0183 (high input), P0182 specifically indicates a low voltage condition.
Symptoms of Error Code P0182
- Malfunction Indicator Lamp (MIL) illuminated
- Hard starting, especially in cold weather
- Poor fuel economy due to incorrect fuel delivery calculations
- Rough idle or hesitation during acceleration
- Black smoke from exhaust (over‑fueling) or white smoke (under‑fueling)
- Possible reduced engine power or limp mode
Main Causes of Error Code P0182
- Short to ground in the sensor signal wire
- Faulty fuel temperature sensor (internal short to ground)
- Open circuit in the 5 V reference wire to the sensor
- Corroded or damaged connector at the sensor
- Contaminated fuel affecting sensor readings
- PCM internal fault (rare)
How to Diagnose Error Code P0182?
- Connect a vehicle diagnostics tool to the DLC port and retrieve all stored DTCs, including freeze frame data. Note fuel temperature reading and engine coolant temperature.
- Perform a visual inspection of the fuel temperature sensor, its wiring, and connector. The sensor is typically located on the fuel rail, fuel line, or inside the fuel tank on some vehicles.
- Start the engine and let it idle. Use a car code scanner with live data to monitor the fuel temperature value. A reading above 250 °F or a voltage near 0 V confirms a low input condition.
- Disconnect the sensor and measure the voltage at the PCM side of the connector. With key on, the signal wire should read approximately 5 V (reference voltage). If it reads 0 V, there is a short to ground or an open in the reference circuit.
- Measure the resistance of the fuel temperature sensor across its terminals. Typical values: at 68 °F, resistance is around 2.5 kΩ; at 212 °F, around 180 Ω. If the resistance is very low (near 0 Ω), the sensor is shorted internally.
- Check for continuity between the signal wire and ground. If there is continuity with the sensor disconnected, the wire is shorted to ground and needs repair.
- If the sensor and wiring check out, clear the code with an obd2 scanner and perform a test drive. If the code returns, consider a PCM software update or replacement (rare).
Possible Causes and Diagnostic Methods
| Possible Cause | How to Check? |
| Short to ground in signal wire | Disconnect sensor; check continuity between signal wire and ground; should be open |
| Faulty sensor (internal short) | Measure sensor resistance; replace if near 0 Ω |
| Open 5 V reference wire | Measure voltage at sensor connector with key on; should be 5 V |
| Corroded connector | Visual inspection; clean with contact cleaner |
| Contaminated fuel | Drain fuel sample; check for water or debris |
Tools needed: obd2 scanner or vehicle diagnostics tool, digital volt/ohmmeter (DVOM), wiring diagram, fuel pressure gauge (optional), basic hand tools, safety glasses.
How do I fix error code P0182? (Solutions to the Problem)
Simple Fixes
- Clear the code with a car code scanner and drive for a few days. If the code does not return, it may have been a temporary glitch.
- Clean the sensor connector contacts with electrical contact cleaner and re‑seat firmly.
- Ensure the fuel tank cap is tight and the fuel system is free of water contamination.
In‑depth Diagnosis and Repair Solutions
- Repair a short‑to‑ground in the signal wire. Locate the damaged section, solder and heat‑shrink the repair.
- Replace the fuel temperature sensor with an OEM or high‑quality aftermarket unit if it is internally shorted.
- Repair an open 5 V reference wire. Restore proper voltage to the sensor.
- If fuel contamination is suspected, drain and replace the fuel, and flush the fuel system.
- If all else fails, perform a PCM software update or replace the PCM (very rare).
Fix faults based on symptoms
| Observed Symptom | Likely Root Cause | Recommended Action |
| Fuel temperature reads 300 °F constantly | Short to ground in wiring or sensor | Check signal wire for short; replace sensor if shorted |
| Sensor voltage near 0 V with sensor disconnected | Short to ground in wiring | Repair shorted wire |
| No 5 V reference at sensor connector | Open reference circuit | Trace reference wire; repair open |
| Code returns after sensor replacement | Wiring issue or PCM problem | Thoroughly inspect harness; check for TSB; consider reflash |
Common Error Code P0182 in Vehicles
Ford & Lincoln: On Ford F‑150, Explorer, and Lincoln Navigator with EcoBoost engines, P0182 often indicates a short to ground in the fuel temperature sensor wiring. Ford TSB 19‑2345 addresses software updates for improved sensor monitoring. A common issue is chafing of the sensor wiring against the intake manifold.
General Motors (Chevrolet, GMC, Cadillac): GM defines P0182 as “Fuel Temperature Sensor A Circuit Low Input”. Common on Silverado, Tahoe, and Escalade with 5.3 L and 6.2 L engines. The sensor is integrated into the fuel pump module on returnless systems. Water contamination in the fuel tank can cause the sensor to short internally.
Chrysler, Dodge, Jeep, Ram: On Ram 1500 with 3.6 L Pentastar engine, P0182 may appear when the fuel temperature sensor in the fuel tank shorts to ground. Chrysler TSB 08‑003‑20 recommends replacing the fuel pump module assembly if the sensor is non‑serviceable.
Toyota & Lexus: Toyota Camry and Lexus ES 350 with direct injection may log P0182 if the fuel temperature sensor on the high‑pressure pump fails with a short. Toyota recommends using genuine Denso sensors. A cracked connector housing is a known issue on 2015–2018 models.
Honda & Acura: Honda Accord and Acura TLX with direct injection sometimes see P0182 due to a shorted fuel temperature sensor in the fuel rail. Honda TSB 21‑045 suggests inspecting the wiring harness for rodent damage, as soy‑based insulation attracts animals.
Volkswagen & Audi: VW Golf GTI and Audi A3 with TSI engines may experience P0182 when the fuel temperature sensor circuit shorts to ground. The sensor is part of the fuel pressure regulator on the fuel rail. Carbon buildup on the sensor tip can cause intermittent low voltage readings.
BMW & Mini: BMW 3 Series and X3 with N20/N26 engines sometimes store P0182 for the fuel temperature sensor. Oil leaks from the valve cover can contaminate the connector and cause a short. Replacing the sensor and cleaning the harness is the standard fix.
P0182 Frequently Asked Questions
Can I drive with a P0182 code?
You can usually drive for a short distance, but it is not recommended for extended periods. The code affects fuel delivery calculations, which can lead to poor performance, increased emissions, and potential engine damage if the fuel mixture becomes too lean or too rich. It is best to diagnose and repair promptly.
How much does it cost to fix P0182?
Costs typically range from $120 to $450. The fuel temperature sensor costs $30–$120 depending on location and OEM vs aftermarket. Labor adds $60–$250, especially if the sensor is inside the fuel tank (requires dropping the tank). Wiring repairs may add $50–$150. Using a vehicle diagnostics tool to confirm the sensor is the actual culprit before buying parts can save money.
Will replacing the fuel temperature sensor always fix P0182?
Not necessarily. If there is a short to ground in the wiring, replacing the sensor alone will not fix it. Always check wiring continuity and voltage levels first. A car code scanner with live data can help confirm the sensor reading before replacement.
Where is the fuel temperature sensor located?
Location varies by vehicle. Common locations include: on the fuel rail (gasoline direct injection), in the fuel tank (part of the fuel pump module), on the fuel line near the engine, or integrated into the fuel pressure regulator. Consult your vehicle’s service manual for the exact location.
Can a bad fuel temperature sensor cause starting problems?
Yes. The PCM uses fuel temperature to calculate injection timing and quantity. A faulty sensor can cause the PCM to deliver incorrect fuel amounts, leading to hard starts, especially in cold weather. The engine may crank without firing or run rough until it warms up.
How do I reset the P0182 code after repair?
Use an obd2 scanner to clear the code. Then perform a drive cycle that includes a cold start, idling for 2–3 minutes, and driving at varying speeds for 10–15 minutes. The PCM will run the fuel temperature sensor monitor during this cycle. If the repair was successful, the MIL should stay off. Avoid simply disconnecting the battery, as that clears adaptive learning and may cause temporary drivability issues.
Is P0182 a serious code?
Moderately serious. While it will not immediately disable the vehicle, it can cause drivability issues, reduce fuel economy, and increase emissions. Prolonged driving with incorrect fuel temperature readings may lead to catalytic converter damage. Early diagnosis with a car scanner is recommended.
P0182 Related OBD2 Errors
- P0180 – Fuel Temperature Sensor A Circuit Malfunction
- P0181 – Fuel Temperature Sensor A Circuit Range/Performance
- P0183 – Fuel Temperature Sensor A Circuit High Input
- P0187 – Fuel Temperature Sensor B Circuit Low Input
- P0188 – Fuel Temperature Sensor B Circuit High Input
- P0190 – Fuel Rail Pressure Sensor Circuit Malfunction
- P0191 – Fuel Rail Pressure Sensor Circuit Range/Performance
- P0087 – Fuel Rail/System Pressure Too Low
- P0088 – Fuel Rail/System Pressure Too High
Important Warning
Important! Always relieve fuel system pressure before working on fuel lines or sensors – fuel spray can cause fire or injury. Wear safety glasses and work in a well‑ventilated area. If you are not experienced with automotive diagnostics, seek help from a certified mechanic. Using a quality obd2 scanner and following manufacturer‑specific procedures ensures accurate results and prevents unnecessary part replacements.