P0184
Fix within a few daysFuel Temperature Sensor "B" Circuit Intermittent/Erratic. This means your engine computer isn't getting a consistent or reliable signal from the fuel temperature sensor, which helps it adjust fuel delivery.
Code P0184 means your fuel temperature sensor "B" signal is intermittent. Common causes: Faulty sensor (70%), wiring issues (25%). Drivability: Yes, for short trips only. Repair cost: $50-$200 DIY, $150-$500 professional.
Can I Drive With P0184?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy acceleration
Stop driving immediately if: Significant power loss, engine stalling, or a strong fuel smell.
Symptoms of P0184
- 1Check Engine Light is on
- 2Hard starting, especially when the engine is cold or very hot
- 3Engine runs rough or idles poorly
- 4Reduced fuel economy
- 5Engine may hesitate or stumble during acceleration
Common Causes of P0184
Parts most likely causing this code, ranked by probability
An internal fault in the sensor prevents it from accurately measuring fuel temperature, leading to erratic signals.
70% of P0184 cases are fixed by replacing the fuel temperature sensor
Poor electrical connection or damaged wires disrupt the signal path between the sensor and the engine computer.
25% of P0184 cases are fixed by repairing wiring or replacing the connector
A rare internal malfunction in the computer prevents it from processing the fuel temperature sensor data correctly.
5% of P0184 cases are fixed by replacing or reprogramming the ECM/PCM
Check These First (Before Buying Parts)
- Visually inspect the fuel temperature sensor "B" and its electrical connector. Look for any signs of physical damage, frayed wires, or corrosion on the terminals.
- Ensure the connector is fully seated and secure.
How to Diagnose P0184
- 1Visually inspect the fuel temperature sensor "B" wiring and connector for any signs of damage, corrosion, or loose connections.
- 2Using a scan tool, monitor the live data for the fuel temperature sensor "B" while wiggling the wiring and connector. Look for sudden drops or erratic readings.
- 3Disconnect the sensor and test its resistance with a multimeter, comparing readings to factory specifications at various temperatures if possible.
- 4Check for proper voltage supply and ground at the sensor connector.
- 5If the sensor and wiring check out, further diagnosis of the ECM/PCM may be necessary, but this is rare.
P0184 on Popular Vehicles
Ford F-150
2004-2024P0184 is not strongly associated with specific widespread issues on F-150s. Diagnosis follows general principles.
70% fixed by replacing the sensor
Chevrolet Silverado
2007-2024Similar to the F-150, P0184 does not have a common, documented vehicle-specific failure mode for Silverado trucks.
70% fixed by replacing the sensor
Honda Accord
2003-2024P0184 is not a common or specific issue for Honda Accord models. The fuel temperature sensor is typically integrated into the fuel pump assembly on many models.
70% fixed by replacing the sensor
Frequently Asked Questions
What does P0184 mean?
P0184 indicates that the engine computer is receiving an intermittent or erratic signal from the fuel temperature sensor "B" circuit, which it uses to adjust fuel delivery.
Can I drive with P0184?
Yes, for short trips only. While the vehicle may still run, the engine computer won't be able to accurately adjust fuel delivery, which can lead to poor performance, reduced fuel economy, and potentially hard starting.
Will P0184 clear itself?
No, P0184 will not clear itself. The intermittent or erratic signal needs to be resolved through diagnosis and repair before the code will clear, either automatically after several drive cycles or by using a scan tool.
How do I fix P0184 myself?
Start by inspecting the fuel temperature sensor "B" wiring and connector for damage. If they look good, you'll likely need to replace the fuel temperature sensor "B" itself.
How much does it cost to fix P0184?
A DIY fix for P0184 typically costs $50-$200 for the sensor part. Professional repair at a shop will cost $150-$500, including parts and labor.
P0184 keeps coming back - why?
If P0184 keeps returning, it's likely due to an overlooked wiring issue, a faulty replacement sensor, or, in rare cases, a problem with the engine computer itself. Double-check all connections and wiring.
Will P0184 fail emissions/smog test?
Yes, P0184 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on is an automatic failure in most testing jurisdictions.
What's the difference between P0184 and P0183?
P0184 indicates an intermittent or erratic signal from the fuel temperature sensor "B" circuit, meaning the signal comes and goes or is inconsistent. P0183 indicates a high input from the same sensor, meaning the signal voltage is consistently too high.
P0184 on Ford F-150?
P0184 is not a code that shows a strong vehicle-specific pattern for the Ford F-150 or other popular vehicles. The diagnostic steps and common causes remain the same across most makes and models.
Questions to Ask Your Mechanic
Did you check the wiring and connector to the fuel temperature sensor 'B' for corrosion or damage before condemning the sensor?
Good answer: Yes, I performed a visual inspection and also wiggled the harness while monitoring live data. The voltage dropped out intermittently, confirming a wiring issue or internal sensor fault.
Repair Cost Estimate
DIY Repair
Parts only
$50-$200
Shop Repair
Parts + labor
$150-$500
Save $100-$300 by doing it yourself
Difficulty
intermediate
Time
1-3 hours
Intermediate - Requires a scan tool for proper diagnosis and potentially working with fuel system components, which can be messy and requires caution.
Cost of Waiting
Ignoring P0184 can lead to consistently poor fuel economy, hard starting, and rough running. While it won't immediately destroy major components, prolonged incorrect fuel delivery can put extra strain on your fuel pump and injectors over time, potentially leading to premature wear.
While You're In There...
If the fuel temperature sensor is located near the fuel filter or requires similar access (e.g., dropping the fuel tank), it's a good time to replace the fuel filter if it's due for maintenance.
On some vehicles, the fuel temperature sensor is an integral part of the fuel pump assembly. If the entire assembly needs to be replaced, consider replacing the pump itself if it's high mileage.
Tools You'll Need
- OBD-II scan tool (to read codes and monitor live data)
- Multimeter
- Basic hand tools (wrenches, sockets, screwdrivers)
- Wire strippers/crimpers (if wiring repair is needed)
- Safety glasses and gloves
P0184 is a common sensor issue. Most repairs involve replacing the sensor or fixing a simple wiring problem, and your vehicle's fuel system will operate correctly afterward.
- Family-owned since 1957
- 990,000+ happy customers
- Fast nationwide shipping
- Easy returns
Your Next Steps
Step 1: Check the wiring and connector to the fuel temperature sensor "B" for any visible damage, corrosion, or looseness. Repair any issues found.
Step 2: If the wiring looks good, use a scan tool to monitor the fuel temperature sensor "B" live data. If the readings are erratic or drop out, disconnect the sensor and test its resistance with a multimeter. Compare to factory specifications.
Step 3: If the sensor tests faulty, you'll likely need to replace the fuel temperature sensor "B". If the sensor is integrated into the fuel pump assembly, the entire assembly may need replacement.