What does the P0183 code mean?
The P0183 is a generic OBD-II powertrain trouble code. Its official definition is “Fuel Temperature Sensor A Circuit High Input“.
When you connect a vehicle diagnostics tool to the diagnostic link connector, the powertrain control module (PCM) reports P0183 if it detects that the voltage signal from the fuel temperature sensor A is higher than the expected range (typically above 4.5 V). The fuel temperature sensor is a thermistor that changes resistance with temperature. As fuel temperature decreases, resistance increases, causing the signal voltage to rise. A high input voltage indicates either a very cold fuel temperature (below -40 °F) or an open/short to power 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 P0182 (low input), P0183 specifically indicates a high voltage condition.
Symptoms of Error Code P0183
- 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 P0183
- Open circuit in the sensor signal wire
- Short to battery voltage (12 V) in the signal wire
- Faulty fuel temperature sensor (internal open circuit)
- Open circuit in the ground wire to the sensor
- Corroded or damaged connector at the sensor
- PCM internal fault (rare)
How to Diagnose Error Code P0183?
- Connect a vehicle code reader 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 of -40 °F or a voltage near 5 V confirms a high 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 12 V or higher, there is a short to battery power.
- 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 infinite (open), the sensor is faulty.
- Check for continuity in the ground circuit. An open ground can cause the signal voltage to float high.
- 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? |
| Open signal wire | Check continuity between sensor and PCM; voltage should drop when sensor connected |
| Signal wire shorted to 12 V | Disconnect sensor; measure voltage at PCM connector; should be 5 V reference, not 12 V |
| Faulty sensor (internal open) | Measure sensor resistance; replace if infinite |
| Open ground wire | Check continuity between ground pin and chassis ground |
| Corroded connector | Visual inspection; clean with contact cleaner; check pin tension |
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 P0183? (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
- Replace the fuel temperature sensor with an OEM or high‑quality aftermarket unit. This resolves the majority of P0183 cases.
- Repair or replace damaged wiring in the sensor circuit. Solder and heat‑shrink any broken wires.
- If the signal wire is shorted to power, locate and insulate the short.
- If the ground wire is open, repair or replace it.
- 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 -40 °F constantly | Open sensor circuit | Check wiring and sensor resistance; replace sensor if open |
| Sensor voltage reads 12 V with sensor disconnected | Short to battery power | Locate and repair short |
| Sensor voltage reads 5 V but code persists | Open ground or PCM issue | Check ground continuity; check for TSB |
| Code returns after sensor replacement | Wiring issue or PCM problem | Thoroughly inspect harness; consider reflash |
Common Error Code P0183 in Vehicles
Ford & Lincoln: On Ford F‑150, Explorer, and Lincoln Navigator with EcoBoost engines, P0183 often indicates an open circuit 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 P0183 as “Fuel Temperature Sensor A Circuit High 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 fail open.
Chrysler, Dodge, Jeep, Ram: On Ram 1500 with 3.6 L Pentastar engine, P0183 may appear when the fuel temperature sensor in the fuel tank develops an open circuit. 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 P0183 if the fuel temperature sensor on the high‑pressure pump fails open. 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 P0183 due to an open 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 P0183 when the fuel temperature sensor circuit opens. The sensor is part of the fuel pressure regulator on the fuel rail. Carbon buildup on the sensor tip can cause intermittent high voltage readings.
BMW & Mini: BMW 3 Series and X3 with N20/N26 engines sometimes store P0183 for the fuel temperature sensor. Oil leaks from the valve cover can contaminate the connector. Replacing the sensor and cleaning the harness is the standard fix.
P0183 Frequently Asked Questions
Can I drive with a P0183 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 P0183?
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 P0183?
In most cases, yes – a faulty sensor is the primary cause. However, if there is an open or short in the wiring, a corroded connector, or a PCM issue, 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 P0183 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 P0183 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.
P0183 Related OBD2 Errors
- P0180 – Fuel Temperature Sensor A Circuit Malfunction
- P0181 – Fuel Temperature Sensor A Circuit Range/Performance
- P0182 – Fuel Temperature Sensor A Circuit Low 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.