Solving P0135 in Your 2024 Jeep Gladiator
Your 2024 Jeep Gladiator triggered P0135—O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1. The upstream oxygen sensor's heater has failed.
The Gladiator's truck platform and off-road capability expose exhaust to harsh trail conditions and towing loads.
Symptoms
- Check engine light on
- 11-22% reduced fuel economy
- Rough cold-start idle
- Hesitation during acceleration
- Extended warm-up period
- Failed emissions test
Common Causes
Failed Heater Element (62% Likelihood)
Your 2024 Gladiator's 3.6L V6 creates thermal stress. Even in new vehicles, early failures occur from manufacturing defects or aggressive use.
Wiring/Connector Damage (24% Likelihood)
Off-road exposure damages wiring or corrodes connectors.
Blown Fuse (9% Likelihood)
Check fuse first—easiest fix.
ECM Software Issue (5% Likelihood)
Rare ECM glitches trigger false codes.
Diagnosis
- Verify P0135
- Check fuse
- Inspect wiring
- Test heater resistance (4-14 ohms)
- Check voltage
- Monitor live data
Repair Costs
Jeep Dealership
Your 2024 Gladiator is under warranty. Repairs should be free (unless off-road abuse).
Out of warranty: $290-$425
Independent Shop
Cost: $210-$350
DIY
Cost: $90-$170
Time: 45-72 minutes
Parts
- OEM Mopar: $142-$190
- Denso: $90-$145
- Bosch: $98-$155
Prevention
- Use Top Tier fuel
- Rinse undercarriage after water crossings
- Inspect exhaust after off-road trips
- Fix exhaust leaks
- Avoid overloading
Driving with P0135
Safe short-term, but fuel economy drops 11-22%. Schedule repairs within 2 weeks to prevent catalytic converter damage ($1,300-$2,900).
When to Get Help
- Under warranty (free service)
- Uncomfortable with truck work
- Code returns after replacement
- Multiple codes
- Trail damage to exhaust
2024 Gladiator Notes
The Gladiator's truck platform and off-road use expose exhaust to harsh conditions. Check dealer for TSBs applicable to your VIN.