P0135 in Your 2022 Ram 2500 Heavy Duty
Your 2022 Ram 2500 has set P0135, indicating oxygen sensor heater circuit malfunction. Whether you have the 6.4L HEMI or 6.7L Cummins diesel, this sensor is critical for performance.
Symptoms
- Check engine light on
- Reduced fuel economy, especially when towing heavy loads
- Rough cold idle
- Hesitation during cold starts
- Reduced power when cold
- Increased emissions
- Failed emissions test
Root Causes
Failed Heater (70%)
Heavy-duty use accelerates thermal stress.
Damaged Wiring (18%)
Harsh conditions damage wiring.
Blown Fuse (6%)
Electrical surges.
Poor Ground (4%)
Corrosion from work conditions.
Software (2%)
ECU bugs.
Diagnosis
- Scan all codes
- Inspect wiring in harsh environment areas
- Test fuse, resistance, power, ground
Repairs
Sensor: $150-$550
Advanced | 60-150 min
Heavy-duty trucks require more labor.
Wiring: $50-$500
Fuse: $5-$100
Prevention
- Quality diesel or premium fuel
- Severe-duty maintenance critical for work trucks
- Protect components from extreme conditions