P0135 on Your 2022 Elantra
Your 2022 Hyundai Elantra has set a P0135 diagnostic code, indicating a malfunction in the oxygen sensor heater circuit for Bank 1, Sensor 1. The 2022 Elantra offers the 2.0L four-cylinder (147 hp), 1.6L turbo (201 hp), or hybrid powertrain. All are inline engines with a single exhaust bank.
At 2-3 years old, your Elantra should still have warranty coverage.
Symptoms
- Check engine light on
- Slightly reduced fuel economy
- Minor rough cold idle
- Emissions test failure
Common Causes
O2 Sensor Heater Element Failure
Manufacturing variation or early wear.
Connector or Wiring Issue
Heat exposure affects connections.
Blown Fuse
Check the O2 heater fuse first.
Warranty Coverage
Hyundai's excellent warranty:
- Bumper-to-Bumper: 5 years/60,000 miles (likely still active)
- Powertrain: 10 years/100,000 miles
- Federal Emissions: 8 years/80,000 miles
This repair should be covered at no cost.
Repair Costs (If Out of Warranty)
- Dealer: $160-$280
- Independent shop: $130-$250
- DIY: $50-$120