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Code P25C6

Quick reference

P25C6 at a glance

Plain-language meaning
This code means that the car's computer found a problem with the temperature sensor in the brake booster. It's like when a thermometer isn't working right and can't tell if it's hot or cold.
Urgency
Moderate – It is important to address this issue to ensure proper brake function.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Wrench set

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

Laymans terms

This code means that the car's computer found a problem with the temperature sensor in the brake booster. It's like when a thermometer isn't working right and can't tell if it's hot or cold.

Explanation

The vehicle's computer monitors the brake booster temperature sensor to ensure it operates within a specific range. If the sensor reports a temperature that is too low, the computer sets this code.

Technical description

The P25C6 code is triggered when the Powertrain Control Module (PCM) detects a low voltage signal from the brake booster temperature sensor 'A' circuit. This could indicate a faulty sensor, wiring issues, or other related problems.

Symptoms

• Illuminated check engine light

• Potential decrease in braking efficiency

• Unusual brake pedal feel

Common Causes

• Faulty brake booster temperature sensor

• Wiring issues or poor connections in the sensor circuit

• Faulty PCM

Glossary

PCM: Powertrain Control Module

OBD-II: On-Board Diagnostics II

Diagnosis steps

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

• Inspect the brake booster temperature sensor and its wiring for damage.

• Test the sensor with a multimeter to check for proper voltage.

Repair procedures

• Replace the brake booster temperature sensor if faulty.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the PCM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Wrench set

Estimated repair cost

$150 - $400

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Camry

• Honda Accord

• Ford Fusion

Preventive measures

• Regularly inspect brake system components.

• Ensure electrical connections are secure and free from corrosion.

• Use quality replacement parts.

Error code type

Sensor Issue

User experience recommendations

• Do not ignore the check engine light.

• Have the vehicle inspected by a professional if unsure.

• Avoid hard braking until the issue is resolved.

Warranty information

Check with your vehicle manufacturer for specific warranty coverage on brake system components.

Historical data

This code is relatively uncommon but can occur in vehicles with advanced brake systems that include temperature monitoring.

Urgency level

Moderate – It is important to address this issue to ensure proper brake function.

Testing conditions

• Engine running

• Vehicle stationary

Component location

The brake booster temperature sensor is typically located near the brake booster assembly in the engine bay.

FAQs

Q: Can I drive with a P25C6 code?
A: It's not recommended to drive with this code as it may affect braking performance.

Q: How do I reset the P25C6 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is resolved, it should not return.

Optional diagnostic gear

Tools that may help diagnose P25C6

FOXWELL Multi-System Scanner diagnostic tool illustration

Pro · Four-system diagnostics

FOXWELL Multi-System Scanner

A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.

Chassis and ABS faults usually need a scanner that can read brake-system data directly.

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EPAuto 1/2" Torque Wrench diagnostic tool illustration

Universal · Torque wrench

EPAuto 1/2" Torque Wrench

Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.

Useful when wheel, hub, or suspension hardware needs correct reassembly torque.

View on Amazon
MaxxHaul Vehicle Ramps diagnostic tool illustration

Universal · Drive-on ramps

MaxxHaul Vehicle Ramps

Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.

Helpful for safer access during underbody inspection work.

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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