P0135 on Your 2022 Colorado
Your 2022 Chevrolet Colorado has set a P0135 diagnostic code, indicating a malfunction in the oxygen sensor heater circuit for Bank 1, Sensor 1. The 2022 Colorado was the final year of the second-generation design, featuring the 2.5L four-cylinder (200 hp), 3.6L V6 (308 hp), or 2.8L Duramax diesel engine options.
On V6 models, Bank 1 is one cylinder bank of the V6 (typically rear). On the four-cylinder and diesel, there's a single bank. Sensor 1 is the upstream O2 sensor before the catalytic converter. The heater element is designed to bring the sensor to operating temperature within seconds of engine start.
What You're Experiencing
- Check engine light illuminated
- Possibly reduced fuel economy
- Rough idle when cold
- Longer warm-up period
- Emissions test failure
Most Colorado owners find their truck runs normally once warmed up. The heater circuit issue primarily affects cold-start emissions and efficiency.
Common Causes on the 2022 Colorado
O2 Sensor Heater Element Failure
Even on a relatively new truck, the heater element can fail from manufacturing variations or early wear. Trucks used for work or towing experience more thermal stress on exhaust components.
Connector or Wiring Issue
The O2 sensor connector can develop problems from heat exposure, vibration, or contamination. Midsize trucks like the Colorado often see varied duty cycles that stress electrical connections.
Blown Fuse
A blown O2 heater fuse will disable the heater circuit. This is a free, quick check that should be done first.
Ground Circuit Problem
A poor ground can prevent proper heater operation, causing intermittent or complete failure.
Warranty Coverage
Your 2022 Colorado should have warranty coverage:
- Bumper-to-Bumper: 3 years/36,000 miles (may still apply)
- Powertrain: 5 years/60,000 miles
- Federal Emissions: 8 years/80,000 miles for certain components
Check your warranty status before paying for repairs. Contact your Chevrolet dealer to verify coverage—this repair may be free.
Diagnosis Steps
- Verify warranty—Could eliminate cost
- Identify your engine—Affects sensor location
- Check fuse—Quick and free
- Inspect connector—Look for damage or corrosion
- Test heater resistance—Should be 2-30 ohms
- Verify power supply—Battery voltage with key on
Repair Costs (If Out of Warranty)
Professional Repair
- Dealer: $180-$320
- Independent shop: $150-$280
DIY Approach
- OEM AC Delco sensor: $70-$130
- Quality aftermarket: $50-$100
What to Expect at the Dealer
If covered under warranty:
- Service advisor documents concern
- Technician scans codes and checks for TSBs
- Heater circuit testing per GM procedures
- Most likely: O2 sensor replacement
- Road test verification
Typical repair time is 1-3 hours. You may be offered a loaner vehicle or shuttle service.
DIY Replacement Tips
If doing the repair yourself (only if out of warranty):
- Work with a cold engine
- Apply penetrating oil overnight
- Disconnect electrical connector first
- Use O2 sensor socket with wire slot
- Sensor may be seized—apply steady pressure
- Anti-seize on new sensor threads
- Torque to spec (30-40 ft-lbs)
- Clear codes and test drive
The Final Second-Gen Colorado
The 2022 Colorado was the last of the second-generation design. Parts and service support remain strong, and the 2.5L, 3.6L, and 2.8L diesel engines are well-understood by shops. A simple O2 sensor issue won't affect long-term reliability.
Prevention Tips
- Use quality fuel
- Address oil leaks promptly
- Allow warm-up before heavy towing
- Rinse undercarriage after off-road use