2014–2019 Toyota Corolla

2014-2019 Toyota Corolla — PCV Valve Replacement

By Tom Becker ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026

🔧 Easy 30 minutes $8 DIY

Save $232 by doing it yourself! Shop cost: $240

Quick answer: PCV Valve Replacement on a 2014–2019 Toyota Corolla is rated Easy and takes about 30 minutes. You'll need 6 tools for this job, and parts cost about $8. This guide walks you through the full job step by step, including the mistakes to avoid.

Quick Video Tutorial

Parts You Need

Total Cost

$8.00

Part Name	Part Number	Price	Buy
PCV Valve	12204-31010	$8.00	Amazon

About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.

💡 Pro tip: Order all parts at once to save on shipping

Step-by-Step Instructions

Follow these steps carefully

Cool the engine and locate the PCV valve

Work on a cool engine. On the Toyota Corolla, find the PCV valve — usually in a valve-cover grommet, intake manifold port, or integrated into a PCV hose/module. Photograph hose routing before removal. Wear gloves and eye protection.

Disconnect the PCV hose

Release any spring clamps or quick-connect fittings and pull the hose from the valve or PCV port. Inspect the hose for cracks, collapse, or oil sludge — replace the hose if damaged.

🔧 Mechanic's note — Ray Delgado

I flex the hose and look for cracks and sludge — I've replaced just the valve before and missed the collapsed hose that was the real problem.

Remove the old PCV valve or module

Pull the valve from its grommet with a gentle twist, or unbolt a PCV module/plate if that is the design. Note orientation and any O-rings. Avoid letting debris fall into the open port.

Inspect related parts

Check the grommet for hardening or tears and replace it if soft or cracked. Clean sludge from the port with a shop towel; do not push debris into the engine.

🔧 Mechanic's note — Tom Becker

I clean the sludge without pushing debris into the engine — I've seen a careless wipe drop crud straight into the port, and that's a problem you don't want.

Install the new PCV valve

Compare the new valve/module to the old one. Lightly oil the grommet if specified, press or bolt the new unit into place until fully seated, and reconnect the hose until the clamp/connector is secure.

🔧 Mechanic's note — Ray Delgado

I compare the new valve to the old one — I've been given the wrong PCV valve in the right box before, and the side-by-side caught it.

Start and verify idle quality

Start the engine and confirm a smooth idle with no whistle or large vacuum leak sound at the PCV connection. Check for oil seepage.

All Done!

Test your repair before closing everything up. If something doesn't work right, double-check your steps.

⚠️ Common Mistakes to Avoid

• Over-tightening the new PCV valve, which can damage the plastic threads.
• Failing to properly reconnect the PCV hose, leading to vacuum leaks.
• Not cleaning the area around the PCV valve before removal, causing debris to enter the engine.