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Code P0696

Quick reference

P0696 at a glance

Plain-language meaning
This code means that the computer in your car thinks there's a problem with the wires or signals that control the third fan, which helps keep the engine cool.
Urgency
High – Address immediately to prevent engine overheating.
Difficulty
Moderate
System
Electrical Circuit 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 computer in your car thinks there's a problem with the wires or signals that control the third fan, which helps keep the engine cool.

Explanation

The P0696 code is triggered when the engine control module (ECM) detects a high voltage condition in the Fan 3 control circuit.

Technical description

The P0696 code indicates that the ECM has detected an abnormally high voltage in the circuit that controls the third cooling fan. This could be due to a short circuit, a faulty fan relay, or a problem with the ECM itself.

Symptoms

• Engine overheating

• Cooling fans not operating

• Check Engine Light illuminated

Common Causes

• Faulty fan relay

• Short circuit in the fan control wiring

• Defective cooling fan

• Faulty ECM

Glossary

ECM: Engine Control Module

OBD-II: On-Board Diagnostics II

Diagnosis steps

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

• Inspect the wiring and connectors for damage or corrosion.

• Test the fan relay and cooling fan operation.

Repair procedures

• Replace the faulty fan relay.

• Repair or replace damaged wiring.

• Replace the defective cooling fan.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• Ford F-150

• Toyota Camry

Preventive measures

• Regularly inspect fan wiring and connections.

• Ensure cooling fans are operating properly.

• Perform routine vehicle maintenance.

Error code type

Electrical Circuit Issue

User experience recommendations

• Avoid driving the vehicle if overheating occurs.

• Seek professional diagnosis and repair.

Warranty information

Repairs may be covered under the vehicle's powertrain warranty if applicable.

Historical data

This code has been associated with electrical issues in the cooling fan system in various vehicle models.

Urgency level

High – Address immediately to prevent engine overheating.

Testing conditions

• Engine at operating temperature

• Cooling fan control circuit engaged

Component location

The cooling fan and its control circuit are typically located at the front of the engine bay, near the radiator.

FAQs

Q: Can I drive my car with a P0696 code?
A: It's not recommended to drive with this code active, as it may lead to engine overheating.

Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code after repairs are made.

Optional diagnostic gear

Tools that may help diagnose P0696

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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