Fixing P0135 in Your 2022 Jeep Grand Cherokee
Your 2022 Jeep Grand Cherokee displayed P0135—O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1. The upstream oxygen sensor's heater has failed.
The Grand Cherokee's powerful engine options create varying thermal loads on emissions systems.
Symptoms
- Check engine light on
- 12-21% reduced fuel economy
- Rough cold-start idle
- Hesitation during acceleration
- Extended warm-up period
- Failed emissions test
Root Causes
Heater Element Failure (64% Likelihood)
Your 2022 Grand Cherokee's engine creates thermal stress. By 40,000-70,000 miles, heater failures become common.
Wiring/Connector Damage (22% Likelihood)
Sensor wiring near exhaust suffers heat damage and vibration.
Blown Fuse (9% Likelihood)
Check fuse first—easiest fix.
ECM Issue (5% Likelihood)
Rare ECM faults trigger false codes.
Diagnosis
- Verify P0135
- Check fuse
- Inspect wiring
- Test heater resistance (4-14 ohms)
- Check voltage
- Monitor live data
Repair Costs
Dealership
If within warranty, free.
Out of warranty: $280-$415
Independent Shop
Cost: $200-$340
DIY
Cost: $85-$160
Time: 48-70 minutes
Parts
- OEM Mopar: $135-$180
- Denso: $85-$138
- Bosch: $92-$148
Prevention
- Use Top Tier premium fuel
- Address oil consumption
- Fix exhaust leaks
- Avoid unapproved additives
- Follow maintenance schedule
Driving with P0135
Safe short-term, but fuel economy drops 12-21%. Schedule repairs within 2 weeks to prevent catalytic converter damage ($1,250-$2,850).
When to Get Help
- Under warranty
- Uncomfortable with exhaust work
- Code returns after replacement
- Multiple codes
2022 Grand Cherokee Notes
The Grand Cherokee's powerful engines create higher thermal loads. Some owners report failures around 50,000 miles. Check dealer for TSBs.