P0185 - Fuel Temperature Sensor A Circuit Range / Performance Problem in Common Vehicles

Quick Answer

P0185 means: The P0185 code indicates a malfunction with the fuel temperature sensor circuit, affecting fuel management and engine performance.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with P0185? It is recommended to address this issue promptly to avoid further damage to the engine and fuel system.

Common Questions

What does P0185 mean and how does it affect my car?

The P0185 code indicates an issue with the fuel temperature sensor circuit, which can negatively impact engine performance, fuel efficiency, and emissions. Ignoring this code may lead to more severe engine problems over time.

What are the most common causes of P0185 and how much does it cost to fix?

Common causes include a faulty fuel temperature sensor, damaged wiring, or a malfunctioning ECM. Repair costs typically range from $150 to $300 for sensor replacement and around $100 to $200 for wiring repairs, depending on labor and parts.

Can I drive my car with P0185 or should I stop immediately?

While you may still be able to drive your vehicle, it's not advisable to ignore the P0185 code. Continuing to drive can lead to reduced performance and increased emissions, and you could risk causing further damage to the engine.

How can I diagnose P0185 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan your vehicle’s OBD2 system to retrieve the P0185 code and any associated freeze frame data. This information can help you understand the conditions under which the fault occurred, aiding in diagnosis.

What vehicles are most commonly affected by P0185?

Commonly affected vehicles include the 2010-2015 Ford Fusion, 2007-2015 Chevrolet Malibu, and 2011-2014 Honda Accord. Always check for any specific recalls or Technical Service Bulletins (TSBs) related to your vehicle.

How can I prevent P0185 from happening again?

Regular maintenance, including inspecting wiring connections and ensuring clean fuel, can help prevent P0185. Additionally, using high-quality fuel and following your vehicle's maintenance schedule are important preventive measures.

What is P0185?

The diagnostic trouble code (DTC) P0185 indicates a problem with the Fuel Temperature Sensor A Circuit. This sensor plays a crucial role in monitoring the temperature of the fuel in the fuel tank, which is important for optimizing engine performance and emissions. When the Engine Control Module (ECM) detects that the signal from the fuel temperature sensor is out of the expected range or not performing as it should, it triggers the P0185 code. This can lead to various issues, including poor fuel economy, increased emissions, and potential engine performance problems. Commonly affected vehicles include the 2010-2015 Ford Fusion, 2007-2015 Chevrolet Malibu, and 2011-2014 Honda Accord, among others. If left unaddressed, the problems associated with a faulty fuel temperature sensor can escalate, potentially leading to more severe engine issues and costly repairs. Drivers may notice symptoms such as a check engine light illumination, erratic engine performance, or a decline in fuel efficiency. To ensure optimal vehicle operation, it is essential to diagnose and resolve the underlying issues related to the P0185 code as soon as indicated.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P0185 is present:

  • Check engine light stays on constantly, indicating a potential issue that needs immediate attention.
  • Engine hesitates during acceleration, which may lead to a frustrating driving experience and reduced performance.
  • Fuel economy decreased by 10-15%, meaning you may be spending more money on gas without any additional mileage.
  • Rough idling or stalling, particularly at low speeds or when coming to a stop, can be a sign of fuel delivery issues.
  • Increased emissions, which could lead to failing an emissions test and higher environmental impact.

Possible Causes

Most common causes of P0185 (ordered by frequency):

  1. The most common cause is a faulty fuel temperature sensor, which has a likelihood of about 60%. This could be due to wear and tear or manufacturing defects.
  2. A second common cause is damaged wiring or connectors in the fuel temperature sensor circuit. Corrosion or fraying can disrupt the signal to the ECM.
  3. A third cause could be a malfunctioning ECM itself, which may misinterpret the sensor data. Regular updates and checks can prevent this.
  4. Less common, but serious, is fuel contamination which can damage the sensor and lead to inaccurate readings.
  5. A rare cause could be an issue with the fuel pump, where it fails to deliver fuel at the correct temperature or pressure.

P0185 Repair Costs

Cost Breakdown by Repair Type

Sensor Replacement

Replacing the faulty fuel temperature sensor.

  • Total: $150 - $300
  • Success rate: 85%
Wiring Repair

Repairing damaged wiring or connectors in the sensor circuit.

  • Total: $100 - $200
  • Success rate: 75%
Money-Saving Tips for P0185
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional P0185 Diagnosis Process

Follow these systematic steps to accurately diagnose P0185. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use multimeter or specific diagnostic tools to test the fuel temperature sensor and wiring (20-30 minutes)

Step 3: Component testing - Use multimeter or specific diagnostic tools to test the fuel temperature sensor and wiring (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Fuel Temperature Sensor Replacement on 2014 Ford Fusion

Vehicle: 2014 Ford Fusion, 75,000 miles

Problem: Customer reported check engine light and reduced fuel efficiency.

Diagnosis: Ran OBD2 scans revealing P0185 code. Inspected wiring and found the fuel temperature sensor was faulty.

Solution: Replaced fuel temperature sensor and cleared codes with GeekOBD APP.

Cost: $220 (includes parts and labor)

Result: Engine performance improved and customer reported better fuel economy.

Case Study 2: Wiring Repair on 2011 Chevrolet Malibu

Vehicle: 2011 Chevrolet Malibu, 90,000 miles

Problem: Check engine light was on, and the vehicle had rough idling.

Diagnosis: Diagnosed with P0185. Found damaged wiring in the fuel temperature sensor circuit.

Solution: Repaired wiring harness and replaced the fuel temperature sensor.

Cost: $180 (specific cost breakdown for parts and labor)

Result: Resolved rough idling issue and cleared trouble codes successfully.

Diagnose P0185

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: P0185
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes