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Code P0805

Quick reference

P0805 at a glance

Plain-language meaning
This code means that the car's computer is having trouble reading the position of the clutch. It's like when you can't tell if a light switch is on or off.
Urgency
Moderate – It should be addressed soon to avoid drivability problems.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Basic hand tools

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

Laymans terms

This code means that the car's computer is having trouble reading the position of the clutch. It's like when you can't tell if a light switch is on or off.

Explanation

The P0805 code is triggered when the Engine Control Module (ECM) detects a malfunction in the clutch position sensor circuit.

Technical description

The clutch position sensor is responsible for informing the ECM about the position of the clutch pedal. If the sensor or its circuit fails, the ECM cannot accurately determine the clutch pedal's position, which can affect vehicle performance and drivability.

Symptoms

• Check Engine Light is on

• Difficulty shifting gears

• Poor vehicle performance

Common Causes

• Faulty clutch position sensor

• Damaged wiring or connectors in the sensor circuit

• Faulty ECM

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 clutch position sensor and its wiring for damage.

• Test the sensor using a multimeter to ensure it's functioning correctly.

Repair procedures

• Replace the clutch position sensor if faulty.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the ECM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Honda Civic

• Ford Focus

• Toyota Corolla

Preventive measures

• Regularly inspect the clutch system.

• Ensure wiring and connectors are secure and undamaged.

• Perform scheduled maintenance.

Error code type

Sensor Issue

User experience recommendations

• Have a professional diagnose and repair the issue.

• Avoid driving the vehicle until the problem is fixed to prevent further damage.

Warranty information

Check with your vehicle manufacturer for warranty coverage on sensor-related issues.

Historical data

This code has been commonly associated with manual transmission vehicles experiencing clutch-related issues.

Urgency level

Moderate – It should be addressed soon to avoid drivability problems.

Testing conditions

• Engine running

• Clutch pedal operation

Component location

The clutch position sensor is typically located near the clutch pedal or on the transmission.

FAQs

Q: Can I drive with a P0805 code?
A: It's not recommended as it can affect vehicle performance and safety.

Q: How do I reset the P0805 code?
A: After repairs, use an OBD-II scanner to clear the code.

Optional diagnostic gear

Tools that may help diagnose P0805

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.

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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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