OBD code P0136 indicates a fault with the Heated Oxygen Sensor 2 (HO2S2) downstream of the catalytic converter in Bank 1. Symptoms include the Check Engine Light on, increased fuel consumption.
Causes can be exhaust leaks, faulty sensor, wiring issues, or fuel system problems.
It’s a moderate issue that can affect emissions and fuel economy.
To fix, inspect and repair any damaged components or wiring related to the sensor.
| Repair Importance Level | 6.67 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 6.67 (Out of 10) |
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Symptoms of the p0136 OBD Code
The vehicle may experience poor fuel economy and rough idling with fault code P0136.
- With OBD code P0136, the Engine Light will be ON.
- High Fuel Consumption can be noticed.
Causes of the p0136 OBD Code
P0136 is typically triggered by a faulty oxygen sensor or wiring issues in the circuit.
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- P0136 can be caused by exhaust gas leaks.
- A faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 1.
- A Heated Oxygen Sensor 2 Bank 1 harness that is open or shorted.
- A Heated Oxygen Sensor 2 Bank 1 circuit with a poor electrical connection.
- Inappropriate fuel pressure.
- Faulty fuel injectors.
Fixing Error Code p0136 Step By Step
Replace faulty oxygen sensor in bank 1 sensor 2 to address P0136 fault code.
- To fix OBDII code P0136, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Test the oxygen sensor’s heater circuit for proper operation.
- Replace the faulty oxygen sensor if necessary.
- Clear the fault codes using a scan tool.
- Perform a test drive to ensure the code does not return.
Cost Of Fixing p0136 Fault Code
Diagnosing and repairing fault code P0136 typically involves testing and replacing the oxygen sensor.
The cost to diagnose and fix OBD code P0136 typically ranges from $75 to $150, with an estimated repair time of 1. 0 hour.
Costs depend on labor rates, shop fees, and any additional parts or services needed for the repair.
Details of the p0136 OBD Code
Fault code P0136 indicates a malfunction in the downstream oxygen sensor circuit.
OBD code P0136 means that the O2 sensor circuit in bank 1 sensor 2 is malfunctioning.
This code is triggered by the Engine Control Module (ECM) when it detects that the voltage signal from the downstream O2 sensor remains stuck or inactive for an extended period of time.
The downstream O2 sensor monitors the efficiency of the catalytic converter.
Mechanic’s Tech Notes
Code P0136 indicates a malfunction in the downstream oxygen sensor circuit for bank 1 sensor 2.
OBDII code P0136 indicates a fault with the downstream oxygen sensor circuit.
To diagnose, use a voltmeter to check the sensor’s voltage output.
A healthy sensor should fluctuate between 0. 1 to 0. 9 volts.
If voltage remains steady or at extremes, the sensor may be faulty.
Inspect wiring for damage or corrosion.
Test the sensor heater circuit for proper resistance.
A scan tool can monitor sensor data for abnormalities.
If all checks out, consider replacing the oxygen sensor.
Remember to clear the code after repairs and perform a road test to ensure the issue is resolved.
FAQ
OBD code P0136 indicates a fault with Heated Oxygen Sensor 2 (HO2S2) Bank 1. Check for exhaust leaks, sensor issues, wiring problems, or fuel system faults.
Symptoms of P0136: Engine Light ON, High Fuel Consumption. Causes: Exhaust leaks, Faulty HO2S2, wiring issues, fuel pressure, injectors. Fix: Inspect wiring, connectors, components for damage.
Diagnose P0136 by checking for exhaust leaks, testing HO2S2 sensor, and inspecting wiring. Fix by addressing issues found during inspection to resolve the fault code.
Wrap Up
If your check engine light is on and you’re experiencing poor fuel economy with OBDII code P0136, it may be caused by a faulty oxygen sensor (bank 1 sensor 2), wiring issues in the oxygen sensor circuit, or a vacuum leak near the sensor.
To address P0136, start by checking the wiring harness for any signs of damage or corrosion.
Test the oxygen sensor’s connector for a secure connection and proper voltage output.
If necessary, replace the oxygen sensor to resolve the issue.
