Understanding P0135 on Your 2020 Murano
Your 2020 Nissan Murano has triggered a P0135 diagnostic code, indicating a malfunction in the oxygen sensor heater circuit for Bank 1, Sensor 1. The 2020 Murano is powered by a 3.5L V6 engine (260 hp). On this transverse-mounted V6, Bank 1 is typically the rear cylinder bank.
At 4-5 years old, your Murano may be experiencing O2 sensor wear.
Symptoms
- Check engine light on
- Reduced fuel economy
- Rough cold idle
- Extended warm-up
- Emissions test failure
Common Causes
O2 Sensor Heater Element Wear
The heater element degrades from thermal cycling.
Connector Corrosion
Heat and road exposure cause corrosion.
Wiring Damage
Heat from the exhaust can damage wiring.
Blown Fuse
Check the O2 heater fuse first.
Warranty Status
- Bumper-to-Bumper: Likely expired
- Powertrain: 5yr/60k (may apply)
- Federal Emissions: 8yr/80k
Repair Costs
- Dealer: $200-$350
- Independent shop: $160-$300
- DIY: $60-$130