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Code P0185

Quick reference

P0185 at a glance

Plain-language meaning
This code means there's a problem with the sensor that measures the temperature of the fuel in your car. It's like a thermometer for the fuel, and it's not working right.
Urgency
Moderate – Should be addressed to prevent further engine issues.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Socket set

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means there's a problem with the sensor that measures the temperature of the fuel in your car. It's like a thermometer for the fuel, and it's not working right.

Explanation

The P0185 code is triggered when the Engine Control Module (ECM) detects a malfunction in the fuel temperature sensor B circuit.

Technical description

The fuel temperature sensor is responsible for providing the ECM with information about the temperature of the fuel. This data is crucial for optimizing fuel injection and combustion. A malfunction in the sensor or its circuit can lead to incorrect temperature readings, affecting engine performance.

Symptoms

• Check Engine Light is on

• Poor fuel economy

• Engine performance issues

Common Causes

• Faulty fuel temperature sensor

• Damaged wiring or connectors

• ECM issues

Glossary

ECM: Engine Control Module

OBD-II: On-Board Diagnostics, Second Generation

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wiring and connectors for damage.

• Test the fuel temperature sensor for proper operation.

Repair procedures

• Replace the faulty fuel temperature sensor.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the ECM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Socket set

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regular maintenance checks

• Ensure proper fuel quality

• Inspect wiring and connectors periodically

Error code type

Sensor Issue

User experience recommendations

• Get the vehicle checked by a professional.

• Avoid long trips until the issue is resolved.

Warranty information

Check with your vehicle manufacturer for specific warranty coverage related to sensors.

Historical data

This code has been a common issue in vehicles with aging sensors or wiring problems.

Urgency level

Moderate – Should be addressed to prevent further engine issues.

Testing conditions

• Engine running

• Vehicle at operating temperature

Component location

The fuel temperature sensor is typically located near the fuel rail or in the fuel tank.

FAQs

Q: Can I drive with a P0185 code?
A: It's not recommended to drive for long periods with this code, as it can lead to poor fuel efficiency and engine performance.

Q: How do I reset the check engine light after fixing the issue?
A: You can reset the light using an OBD-II scanner or by disconnecting the battery for a few minutes.

Optional diagnostic gear

Tools that may help diagnose P0185

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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