P0135 on Chevrolet: How to Diagnose & Fix
O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
1 Chevrolet model · 1 documented issue · $100-$300 repair
P0135 on Chevrolet by model: symptoms, diagnosis and fix
Oxygen sensors fail causing poor fuel economy and check engine light. Both upstream and downstream sensors prone to failure. Oil consumption issues accelerate sensor fouling.
Common Symptoms
- Check engine light
- Poor fuel economy
- Rough idle
- Failed emissions test
- Sulfur/rotten egg smell
How to Fix
Replace failed oxygen sensor(s). Use Denso or NTK OEM-quality sensors. Address any oil consumption issue to prevent premature fouling of new sensor.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Oxygen SensorCross-ref13051
Fitment confirmed against the ShowMeTheParts catalog for this vehicle's year and engine.
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Sources for this issue (1)
P0135 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0135 mean on a Chevrolet?
P0135 stands for "O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)." This code means the heater built into your upstream oxygen (O2) sensor on Bank 1, Sensor 1 — the sensor before the catalytic converter — isn't behaving as the engine computer expects. Modern O2 sensors have an internal heating element so they reach operating temperature quickly and can read the exhaust's oxygen content right after startup. When the computer detects that the heater circuit is open, shorted, or drawing the wrong amount of current, it sets P0135. A cold or slow-to-heat sensor delays accurate fuel mixture readings, which can hurt fuel economy and emissions. On Chevrolet it is documented across 1 model: Prizm.
What are the most common causes of P0135?
The most common causes of P0135 are: Failed O2 sensor heater element (most common), Blown O2 sensor heater fuse, Corroded or loose O2 sensor connector, Damaged or melted wiring near the exhaust, Open or shorted heater control circuit, Poor ground or power supply to the sensor, Faulty PCM/ECM heater driver (rare). The specific cause varies by vehicle.
How much does it cost to fix P0135 on a Chevrolet?
Published repair estimates on Chevrolet range from $100 to $300 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0135 on a different make?
View P0135 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.