P0420 on JEEP RENEGADE — Catalyst System Efficiency Below Threshold Bank 1

Q: "What does P0420 mean on a JEEP RENEGADE?"

"P0420 indicates: Catalyst System Efficiency Below Threshold Bank 1. This is a emission controls code. 2 JEEP RENEGADE owners have reported this to NHTSA."

Q: "What are the most common causes of P0420 on JEEP RENEGADE?"

"Based on 2 NHTSA reports, the most commonly cited components are: Power Train,Engine, Engine And Engine Cooling. These percentages are based on the component field in owner complaints."

Q: "Is P0420 serious on my JEEP RENEGADE?"

"Of 2 NHTSA reports for this code on JEEP RENEGADE, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my JEEP RENEGADE shows P0420?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0420 Means on Your JEEP RENEGADE

P0420 is a diagnostic trouble code indicating: Catalyst System Efficiency Below Threshold Bank 1. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 JEEP RENEGADE owners have reported this issue to NHTSA across model years 2017. Most reports come from the 2017 model year. The most commonly reported component is Power Train,Engine (50.0% of reports).

Real JEEP RENEGADE Owner Reports

Source: NHTSA Complaints Database

"my grandfather has own he renegade since it came out in 2017. it has had nothing but issues most of which as his granddaughter i had fixed. but the last at least year I've had his vehicle illuminate a check engine light. Especially in very wet weather, cold or hot weather."

— 2017 JEEP RENEGADE owner · POWER TRAIN,ENGINE · Filed 04/25/2024

"The contact owns a 2017 Jeep Renegade. The contact stated while driving approximately 40-45 MPH, the check engine warning light illuminated. Additionally, the contact stated that the vehicle was experiencing engine hesitation while driving at various speeds."

— 2017 JEEP RENEGADE owner · ENGINE AND ENGINE COOLING · Filed 03/22/2025

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

2

'17

Common Causes on JEEP RENEGADE

Based on NHTSA complaint component analysis for this vehicle.

POWER TRAIN,ENGINE 50%

ENGINE and ENGINE COOLING 50%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0420 mean on a JEEP RENEGADE? ▾

P0420 indicates: Catalyst System Efficiency Below Threshold Bank 1. This is a emission controls code. 2 JEEP RENEGADE owners have reported this to NHTSA.

What are the most common causes of P0420 on JEEP RENEGADE? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Power Train,Engine, Engine And Engine Cooling. These percentages are based on the component field in owner complaints.

Is P0420 serious on my JEEP RENEGADE? ▾

Of 2 NHTSA reports for this code on JEEP RENEGADE, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my JEEP RENEGADE shows P0420? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.