P0430 on RAM
Catalyst System Efficiency Below Threshold (Bank 2)
P0430 on RAM vehicles indicates catalyst system efficiency below threshold (bank 2). Au7o has documented this code across 2 RAM models — most commonly on 1500, 1500 Classic. This code means the catalytic converter on Bank 2 (the side of the engine that does not contain cylinder #1) is not reducing emissions as effectively as it should. The computer compares the readings of the oxygen sensors before and after the converter; if the downstream sensor's signal starts mirroring the upstream one, it indicates the converter is no longer storing and processing oxygen properly. This usually points to a worn-out or damaged catalytic converter, but it can also be caused by faulty sensors or upstream engine problems that have poisoned the converter. The car will generally still run, but it will fail an emissions test. Typical repair costs on RAM range from $100 to $1,500, depending on the specific model and root cause.
Common Causes of P0430
- •Worn-out or failed catalytic converter (Bank 2)
- •Faulty downstream (post-cat) oxygen sensor
- •Faulty upstream oxygen sensor giving bad data
- •Exhaust leak near the converter or sensors
- •Engine misfire or oil/coolant burning that damaged the catalyst
- •Running too rich or too lean over time
- •Aftermarket or non-compliant catalytic converter
P0430 on RAM by Model
RAM 1500(1 issue)
- Exhaust Manifold Bolt Breakage2009-2019
The exhaust manifold bolts on HEMI engines are prone to breaking due to heat cycling. Broken bolts cause exhaust leaks, ticking noise on cold start, and potential exhaust smell in cabin. The rear bolts on both sides are most commonly affected.
RAM 1500 Classic(1 issue)
- 5.7L HEMI Exhaust Manifold Bolt Breakage2019-2024
The exhaust manifold bolts on the 5.7L HEMI break due to thermal cycling, causing an exhaust leak with a ticking sound that is louder on cold starts and quiets as the engine warms up.
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View P0430 across all makes →Frequently Asked Questions
What does P0430 mean on RAM?▼
P0430 stands for "Catalyst System Efficiency Below Threshold (Bank 2)." This code means the catalytic converter on Bank 2 (the side of the engine that does not contain cylinder #1) is not reducing emissions as effectively as it should. The computer compares the readings of the oxygen sensors before and after the converter; if the downstream sensor's signal starts mirroring the upstream one, it indicates the converter is no longer storing and processing oxygen properly. This usually points to a worn-out or damaged catalytic converter, but it can also be caused by faulty sensors or upstream engine problems that have poisoned the converter. The car will generally still run, but it will fail an emissions test. On RAM specifically, this code is documented across 2 models.
What causes P0430 on RAM vehicles?▼
Common causes on RAM: Worn-out or failed catalytic converter (Bank 2), Faulty downstream (post-cat) oxygen sensor, Faulty upstream oxygen sensor giving bad data, Exhaust leak near the converter or sensors, Engine misfire or oil/coolant burning that damaged the catalyst. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0430 on a RAM?▼
Repair costs on RAM range from $100 to $1,500, depending on the specific model and root cause.
Which RAM models have P0430 documented?▼
Au7o has documented P0430 on 2 RAM models: 1500, 1500 Classic.