Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means a hose that helps the car engine breathe is not connected properly.
The engine's crankcase ventilation system helps manage gases and pressure inside the engine. If a hose is disconnected, it can cause engine performance issues.
The crankcase ventilation system is responsible for venting gases from the engine's crankcase. Hose B being disconnected can lead to improper ventilation, affecting engine efficiency and emissions.
• Check engine light is on
• Poor engine performance
• Unusual engine noises
• Hose B is physically disconnected
• Hose B is damaged or cracked
• Improper installation of hose
Crankcase: The part of the engine that houses the crankshaft.
Ventilation: The process of allowing air to circulate and remove gases.
• Inspect Hose B for disconnection or damage
• Check for any vacuum leaks
• Ensure proper installation of the hose
• Reconnect Hose B securely
• Replace Hose B if damaged
• Check for other leaks in the system
• Socket set
• Screwdriver
• Vacuum gauge
$50 - $150
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regularly inspect hoses for wear and tear
• Ensure all hoses are properly connected during maintenance
• Replace old hoses periodically
Engine Performance
• Have a professional inspect your vehicle if you're unsure
• Do not ignore the check engine light
• Regular maintenance can prevent such issues
Check with your vehicle manufacturer for warranty coverage related to emissions components.
This code has been associated with issues in vehicles with high mileage or those that have not been maintained regularly.
Moderate – It should be addressed soon to prevent further engine issues.
Driving with a disconnected crankcase ventilation hose may lead to increased emissions, which could be illegal in some areas.
• Engine at operating temperature
• Vehicle idling
The crankcase ventilation system and its hoses are typically located on the top or side of the engine.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to poor engine performance and increased emissions.
Q: Can I fix this myself?
A: If you're comfortable with basic car maintenance, you can inspect and reconnect the hose yourself. Otherwise, consult a professional.
High-End · Full-system diagnostics
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
Universal · Digital multimeter
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
Universal · Wire connectors and 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 AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.