P0136 on Chevrolet
O2 Sensor Circuit Malfunction (Bank 1, Sensor 2)
P0136 on Chevrolet vehicles indicates o2 sensor circuit malfunction (bank 1, sensor 2). Au7o has documented this code across 1 Chevrolet model — most commonly on Prizm. 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. Typical repair costs on Chevrolet range from $100 to $300, depending on the specific model and root cause.
Common Causes of P0136
- •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)
P0136 on Chevrolet by Model
Chevrolet Prizm(1 issue)
- Oxygen Sensor Failure1998-2002
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.
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View P0136 across all makes →Frequently Asked Questions
What does P0136 mean on 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 specifically, this code is documented across 1 model.
What causes P0136 on Chevrolet vehicles?▼
Common causes on Chevrolet: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0136 on a Chevrolet?▼
Repair costs on Chevrolet range from $100 to $300, depending on the specific model and root cause.
Which Chevrolet models have P0136 documented?▼
Au7o has documented P0136 on 1 Chevrolet model: Prizm.