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Code P3445

Quick reference

P3445 at a glance

Plain-language meaning
This code means there's a problem with the part of the car that helps control how air leaves the engine from one of the cylinders. It's like a door that isn't opening or closing properly.
Urgency
Moderate – Should be addressed soon to avoid further engine performance issues.
Difficulty
Moderate
System
Engine Performance
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 part of the car that helps control how air leaves the engine from one of the cylinders. It's like a door that isn't opening or closing properly.

Explanation

The P3445 code indicates that the engine control module (ECM) has detected a problem with the circuit that controls the exhaust valve for cylinder 6. This could be due to an open circuit or a malfunction in the control system.

Technical description

The P3445 code is triggered when the ECM detects an open or malfunction in the circuit controlling the exhaust valve for cylinder 6. This can affect the engine's ability to manage exhaust gases, potentially leading to performance issues.

Symptoms

• Check Engine Light illuminated

• Reduced engine performance

• Increased fuel consumption

Common Causes

• Faulty exhaust valve solenoid

• Open or shorted wiring in the exhaust valve control circuit

• Faulty ECM

Glossary

ECM: Engine Control Module

Solenoid: A device that controls the flow of electricity in a circuit

Diagnosis steps

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

• Inspect the wiring and connections for cylinder 6 exhaust valve solenoid.

• Test the exhaust valve solenoid for proper operation.

Repair procedures

• Repair or replace damaged wiring or connectors.

• Replace the faulty exhaust valve solenoid.

• Reprogram or replace the ECM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Socket set

Estimated repair cost

$150 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• GMC Sierra

• Cadillac Escalade

Preventive measures

• Regular maintenance and inspections

• Ensure proper electrical connections

• Use quality fuel and oil

Error code type

Engine Performance

User experience recommendations

• Do not ignore the Check Engine Light.

• Have the vehicle inspected by a professional mechanic.

• Avoid heavy loads or towing until repaired.

Warranty information

Check with the vehicle manufacturer for warranty coverage on engine components.

Historical data

This code is commonly associated with vehicles that have cylinder deactivation technology.

Urgency level

Moderate – Should be addressed soon to avoid further engine performance issues.

Testing conditions

• Engine at operating temperature

• Vehicle in idle or low-load conditions

Component location

The exhaust valve solenoid for cylinder 6 is typically located near the engine's cylinder head.

FAQs

Q: Can I drive with a P3445 code?
A: It is possible to drive short distances, but it's recommended to have the issue fixed to avoid further damage.

Q: What happens if I ignore the P3445 code?
A: Ignoring this code can lead to reduced engine performance and increased fuel consumption.

Optional diagnostic gear

Tools that may help diagnose P3445

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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