Home / Nissan Murano
Diagnosis
Nissan Murano Check Engine Light: V6 & CVT Causes
Why a Nissan Murano check engine light comes on — the V6's P0420/P0430 converter codes, evap and sensor faults, and the CVT symptoms to watch.
What it isA logged fault on the V6 Murano — evap, sensor, converter, sometimes CVT
UrgencyModerate
Safe to drive?Steady and shifting smooth, yes. Blinking, shuddering, or limp mode, no
Typical cost$0 gas cap to ~$1,300 converter (V6 has two); CVT issues are a separate, larger cost
P0420P0430P0171P0455P0744
The Murano combines two things we’ve already met: a V6 (so a bit more emissions plumbing) and a CVT (so the transmission watch-item). Its check engine light, then, reads like a mix of the Pathfinder and the Altima. Start with the freebie — the gas cap — because a loose one sets an evap code and is the single most common trigger.
On the V6 side, the regulars are oxygen sensors and the bank-specific converter codes: P0420 (bank 1) and P0430 (bank 2). Two banks means two converters and more sensors, so that left-or-right detail matters for knowing where to look — and neither code automatically means a new converter, since an upstream sensor can set it. Converters aren’t cheap on a V6, so diagnosis pays here.
On the transmission side, the Murano’s CVT carries the same caution as the cars: shuddering, slipping, or limp mode alongside the light points at the transmission, not a sensor. A steady light with smooth shifting is almost always a routine engine-side fault; a light with those symptoms is a transmission conversation. Before paying for CVT work, run your VIN — Nissan extended CVT coverage on some Murano years, and a covered repair beats a four-figure estimate. Rule out the cap, scan it, note how it’s shifting.
The move, step by step
- Reseat the gas cap — A loose-cap evap code is the cheapest, most common Murano trigger. Free to rule out.
- Scan it — P0420/P0430 (converter, per bank) and oxygen-sensor codes are V6 regulars.
- Note transmission behavior — A light with shuddering or limp mode points at the CVT, not a sensor.
- Check VIN for CVT coverage — Nissan extended CVT warranties on some model years — covered work can be free.
Tool for the job: a basic OBD2 scanner reads the exact code in under a minute. See scanners on Amazon →
As an Amazon Associate, Nissan Dash Decoder earns from qualifying purchases made through links on this page. It costs you nothing extra and helps keep this desk running.
Nissan owners ask
What usually causes a check engine light on a Nissan Murano?
The Murano is a V6 crossover, so it has the usual causes plus more hardware to set them. The cheap, common one is an evap code from a loose gas cap. As miles climb, oxygen sensors and converter codes — P0420 for bank 1, P0430 for bank 2 — are the regulars, with two converters and more sensors than a four-cylinder. And like other Nissans, the Murano's CVT can trigger a light with shuddering or limp-mode symptoms, so scan it and note how the car is shifting.
Does the Nissan Murano have CVT problems behind the check engine light?
It can. The Murano uses a continuously variable transmission paired with its V6, and aging CVTs can shudder, slip, overheat, or trigger limp mode, sometimes with a transmission code. A plain steady light is more often a sensor or converter issue, but a light alongside those driving symptoms points at the CVT. Nissan extended CVT coverage on certain model years, so check your VIN before paying for transmission work.
What's the difference between P0420 and P0430 on a Murano?
Both are catalytic-converter-efficiency codes for different banks of the V6 — P0420 is bank 1, P0430 is bank 2 (bank 1 has cylinder number one). They mean the same thing on their respective side, and as with any P0420/P0430, a failing downstream oxygen sensor can set the code, so a little diagnosis beats replacing a converter on a guess — especially on a V6, where converters aren't cheap.
Is it safe to drive my Nissan Murano with the check engine light on?
A steady light with the V6 running and shifting smoothly is generally fine to a scan within a few days. Stop driving it hard if the light is blinking (a misfire) or the Murano is shuddering, slipping, or in limp mode — that points at the CVT, and those problems only worsen with continued driving. With the family aboard, a steady light is usually routine, but transmission symptoms warrant prompt attention.
Updated 2026-07-01 · Independent reference, not a substitute for a hands-on diagnosis.