P0136 on Chevrolet: How to Diagnose & Fix
O2 Sensor Circuit Malfunction (Bank 1, Sensor 2)
1 Chevrolet model · 1 documented issue · $100-$300 repair
P0136 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)
P0136 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 P0136 mean on a Chevrolet?
P0136 stands for "O2 Sensor Circuit Malfunction (Bank 1, Sensor 2)." This code indicates a malfunction in the downstream oxygen sensor circuit for bank 1, sensor 2 — the O2 sensor located after the catalytic converter on the engine side containing cylinder 1. This rear sensor's main job is to monitor how well the catalytic converter is working by checking the oxygen content of the cleaned exhaust. The computer sets this code when the sensor's signal is out of range, implausible, stuck, or its circuit appears faulty. It generally points to the downstream sensor, its wiring or heater circuit, or an exhaust leak, rather than an immediate engine performance problem. On Chevrolet it is documented across 1 model: Prizm.
What are the most common causes of P0136?
The most common causes of P0136 are: Failed or aged downstream oxygen sensor, Damaged O2 sensor wiring, connector, or heater circuit, Exhaust leak near the rear sensor, Open or short in the sensor heater power supply, Corrosion or poor connection at the sensor connector, Contaminated sensor (oil, coolant, or fuel additives), Faulty engine control module (rare). The specific cause varies by vehicle.
How much does it cost to fix P0136 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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.