How much does it cost to fix P0135 on a Nissan?

Repair costs for P0135 on Nissan vehicles typically range from $90 to $250 depending on the underlying cause. The most common fix is: Upstream oxygen sensor heater element failure from age and heat cycling.

Nissan Check Engine Code

P0135 on Nissan

O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

Severity: low DIY difficulty: 2/5 Nissan cost: $90–$250

Last updated April 30, 2026 Also covers: Infiniti

P0135 on Nissan: what makes it different

P0135 (O2 sensor heater circuit, bank 1 sensor 1) is a frequently reported code on Nissan's VQ and QR-series engines found in the Altima, Sentra, and Maxima, largely because the upstream oxygen sensor sits close to the exhaust manifold where heat cycling degrades the heater element over time.

Most-affected engines

QR25DE 2.5L (Altima, Sentra)
VQ35DE/VQ37VHR 3.5L (Maxima, Altima)
MR20DE 2.0L (Sentra, Rogue)

Common model years: 2007–2016

Most likely cause on Nissan

Upstream oxygen sensor heater element failure from age and heat cycling

Known Nissan engine-family issues

Nissan's upstream O2 sensors on these engine families tend to have a shorter service life for the heater circuit compared to the sensing element itself, so it's common to see this code appear well before the sensor shows any fuel trim or performance issues.

Nissan-specific causes (most common first)

Upstream O2 sensor heater circuit wearing out with age and mileage
Corroded or damaged wiring connector near the exhaust manifold heat shield
Blown fuse related to the O2 sensor heater circuit
Exhaust manifold heat shield rattling and chafing the sensor wiring over time
Aftermarket or low-quality replacement O2 sensor with a weak heater circuit
Engine control module ground connection issue affecting heater circuit

Nissan-specific diagnostic tip

Check the exhaust manifold heat shield for looseness or rattling first — on Nissan four and six-cylinder engines, a loose heat shield can chafe through the O2 sensor wiring harness over time and mimic a failed sensor, so a wiring inspection can save you an unnecessary sensor replacement.

Symptoms drivers report

Check engine light
Slower warm-up period where the car runs in open loop longer
Slight fuel economy hit on short trips

Typical repair cost on Nissan

Most Nissan owners fix P0135 for between $90 and $250, depending on which underlying cause turns out to be at fault. Start with the most-likely cause for your vehicle — Upstream oxygen sensor heater element failure from age and heat cycling — before throwing parts at it.

Nissan P0135 FAQ

Will P0135 affect my Nissan's fuel economy?

Not directly from the heater circuit itself, but if the sensor can't reach operating temperature quickly, the engine may run longer in open-loop fuel mode, which can slightly reduce fuel economy.

Can I just unplug the heater circuit instead of replacing the sensor?

No, this isn't recommended — the heater circuit is needed for the sensor to reach operating temperature quickly, and disabling it will likely keep the code active and may affect emissions performance.

How many O2 sensors does my Nissan have, and which one is bank 1 sensor 1?

On four-cylinder Nissans there's typically one bank, so bank 1 sensor 1 is the upstream sensor before the catalytic converter; on V6 models like the Maxima, bank 1 refers to the cylinder bank on the side with cylinder 1.