P0183
Fuel Temperature Sensor A Circuit High
If your vehicle's onboard computer has flagged the diagnostic trouble code P0183, it refers to a detected anomaly regarding "Fuel Temperature Sensor A Circuit High". This systemic engine fault needs a targeted check before symptoms expand.
Driver's Summary
Code P0183 means your vehicle detected a problem with the fuel temperature sensor a circuit high system. Typical symptoms include check engine light, lean running condition, hesitation. Low severity — the car drives normally, but the fault should be diagnosed and resolved within the next few weeks.
Symptoms
Check engine light, lean running condition, hesitation
Common Causes
- Short to voltage in fuel temp sensor circuit
- Open circuit or unplugged sensor
- Failed fuel temperature sensor
- Corroded ground
How to Fix
- 1 Fix short to battery voltage
- 2 Plug in sensor or fix broken wire
- 3 Replace fuel temp sensor
- 4 Clean ground connection
Technical Explanation
Code P0183 is confirmed when the ECM's diagnostic algorithm detects a parameter deviation that persists across a defined number of consecutive drive cycles. The diagnostic runs during closed-loop operation only, ensuring the engine is at full operating temperature and the PCM's fuel trim feedback loop is active before confirming any out-of-range condition. The MIL illuminates after the fault is confirmed on two consecutive drive cycles, and the freeze frame data captured at first detection is stored in the PCM's memory for diagnostic reference.
Is It Safe to Drive?
This code won't strand you, but it shouldn't be ignored indefinitely. The short to voltage in fuel temp sensor circuit issue identified by P0183 can mask other developing problems and will cause an automatic emissions test failure in most states.
Mechanic's Pro Tip
The most common mistake with P0183 is replacing the sensor without verifying the reference voltage and ground integrity first. Use a scan tool to monitor the sensor's live output; a truly failed sensor shows a stuck, flatlined reading — a sensor that fluctuates but reads slightly off usually indicates a wiring or vacuum issue, not a dead sensor. Always spray electrical contact cleaner on the connector pins before condemning the sensor.
Related Fault Codes
Frequently Asked Questions
What does OBD2 code P0183 mean?
OBD2 code P0183 refers to Fuel Temperature Sensor A Circuit High. If your vehicle's onboard computer has flagged the diagnostic trouble code P0183, it refers to a detected anomaly regarding "Fuel Temperature Sensor A Circuit High". This systemic engine fault needs a targeted check before symptoms expand.
What are the most common symptoms of DTC P0183?
Drivers experiencing code P0183 typically report: Check engine light, lean running condition, hesitation.
Is it safe to drive with trouble code P0183 active?
This code won't strand you, but it shouldn't be ignored indefinitely. The short to voltage in fuel temp sensor circuit issue identified by P0183 can mask other developing problems and will cause an automatic emissions test failure in most states.
How much does it cost to fix code P0183?
The estimated repair cost for P0183 ranges from $50 to $300 USD. Wiring repair: $100; Sensor replacement: $100 - $300
Wiring repair: $100; Sensor replacement: $100 - $300
Need Professional Diagnostic Assistance?
Always verify sensor signals and wiring integrity with an OBD2 scanner before purchasing replacement parts.
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