Chevrolet code
P0430: on a Chevrolet
How much to fix P0430 on a Chevrolet? Typically $430 to $2,325 for catalytic converter replacement, the most common fix. This is an estimate, not a quote.
On GM V6 and V8 engines, bank 2 is the side opposite cylinder 1. P0430 means that side's converter test failed. On Chevy trucks with cylinder deactivation, a misfire from one stuck lifter can lead to a converter code later.
General meaning of P0430: This is the same check as P0420 but on the second side of a V-style or flat engine. The sensor after the converter is reading too much like the one before it, so the converter on that side is not cleaning the exhaust enough. See the full P0430 page.
Models to know about
| Model | Years | What to know |
|---|---|---|
| Silverado 1500 | 2007 to 2018 | 5.3 V8 with active fuel management. |
| Tahoe | 2007 to 2020 | Same V8s. |
| Equinox | 2010 to 2017 | 3.6 V6 has two converters. |
| Traverse | 2009 to 2017 | 3.6 V6. |
Common causes on a Chevrolet
- Misfires on the bank 2 cylinders that overheated the catalyst.
- Rear oxygen sensor aging.
- Oil burning through the cylinder deactivation system on high-mileage V8s.
- Exhaust manifold bolts broken and leaking on that side.
NHTSA's public complaint file shows how owners describe this kind of trouble: the 2011 Chevrolet Silverado 1500 has 638 complaints on file, and 18 of them use wording like catalytic, check engine, P0430, misfire; the 2013 Chevrolet Equinox has 751 complaints on file, and 90 of them use wording like catalytic, check engine, P0430, misfire. Complaints are owner reports, not proof of a cause.
Check this first
- Pull the history for misfire codes (P0300-P0308).
- Ask whether the valve lifters on that side were considered.
- Check for exhaust manifold bolt breaks, common on the 5.3.
Wide range: this job varies a lot. Itemize your quote for a better answer.
How this range is built
| Part of the job | Low | High |
|---|---|---|
| Parts | $300 | $1,900 |
| Labor: 1.2 to 2.5 hours × $110 to $150 an hour | $132 | $375 |
| Fees: shop supplies, disposal, diagnostics | $0 | $40 |
| Total, rounded | $430 | $2,325 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in the US, $27.13 an hour, times 4 to 5.5 to cover what a shop bills (overhead, tools, insurance, profit). Parts are a band from budget aftermarket to the manufacturer part. In California and New York, parts cost more because those states require a California-certified converter. Full method.
Not a repair shop, estimates only. Typical range, estimate. Not a quote. Your car, parts and shop change the number.
Parts for these trucks are easy to get. Labor on a broken manifold bolt is the surprise cost.
Other repairs that may be involved
| Repair | Typical range, US |
|---|---|
| Catalytic converter replacement | $430 to $2,325 |
| Oxygen sensor replacement (one sensor) | $100 to $350 |
Questions to ask the shop
- Do you see misfire data on bank 2?
- Is the manifold sealing?
- Is the converter OEM or aftermarket?
Got a quote already? Check it against the range. Wondering if a recall touches this problem? See Chevrolet recalls by model or check a VIN.
P0430 on a Chevrolet: questions
Is bank 2 the driver side?
On most GM V8s bank 2 is the passenger side, but confirm for your model.
Is cylinder deactivation to blame?
Sometimes, through lifter wear. Ask for misfire proof.
How much does it cost to fix P0430 on a Chevrolet?
The most common fix, catalytic converter replacement, has a typical range of $430 to $2,325 across the US. That is an estimate built from parts prices and local labor wages, not a quote. Your model, engine and shop move it.
P0430 on other makes
Sources
- NHTSA complaints, 2011 Chevrolet Silverado 1500
- NHTSA complaints, 2013 Chevrolet Equinox
- NHTSA recall lookup by VIN
- US federal emissions defect warranty rules (40 CFR part 85, subpart V)
Written from public NHTSA data, owner-reported patterns and general repair knowledge, in our own words. Model lists are examples, not a full list, and patterns are not a diagnosis. Prices updated October 2026. Not a repair shop, estimates only.