I've got a PO420 catalyst system efficiency below threshold bank 1.

What is your question?

It came on after I changed my thermostat. What needs to be done now?

Dec 6, 2014

1 Reply

What are the best Chevrolet repair shops?

RepairPal Certified shops can diagnose and repair your 2004 Chevrolet Trailblazer. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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1 Reply

Tuffy Tire & Auto Service Center - Grandview

4.7

(85)

2.39 mi

1524 W 5th Ave

Columbus, OH

Closed

Opens 8:00 AM Mon

Call

Excite Auto Repair & Towing

4.4

(15)

5.94 mi

3430 Westerville Road

Columbus, OH

Closed

Opens 9:00 AM Mon

Call

All In Auto Service

4.7

(30)

6.56 mi

5200 Fisher Road

Columbus, OH

Closed

Opens 8:00 AM Mon

Call

Tuffy Tire & Auto Service - Grove City

4.4

(523)

6.67 mi

2131 Stringtown Rd

Grove City, OH

Closed

Opens 7:30 AM Mon

Call

Blackstone Complete Auto Care

(39)

6.77 mi

4800 Sinclair Road

Columbus, OH

Closed

Opens 9:00 AM Mon

Call

Boyd's Tire & Service - Columbus

4.7

(189)

7.23 mi

5263 Godown Rd

Columbus, OH

Closed

Opens 8:00 AM Mon

Call

See All 30 Locations

Tuffy Tire & Auto Service Center - Grandview

4.7

(85)

2.39 mi

1524 W 5th Ave

Columbus, OH

Closed

Opens 8:00 AM Mon

Call