OBD code P0135 indicates a malfunction in the Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit.
Symptoms include the Engine Light ON, increased fuel consumption.
Common causes are a faulty sensor, wiring issues, or a defective Engine Control Module (ECM).
While not an immediate threat, it can lead to poor fuel economy.
To fix, inspect and repair any damaged wiring or connectors 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 p0135 OBD Code
The vehicle may experience poor fuel economy and rough idling with fault code P0135.
- With OBD code P0135, the symptoms may include: Engine Light ON.
- Higher fuel consumption.
Causes of the p0135 OBD Code
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P0135 is typically triggered by a faulty oxygen sensor or wiring issues in the circuit.
- P0135 can be caused by a faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1.
- A Heated Oxygen Sensor Bank 1 Sensor 1 harness that is open or shorted.
- A poor electrical connection in the Heated Oxygen Sensor Bank 1 Sensor 1 circuit.
- A blown fuse in the Heated Oxygen Sensor Bank 1 Sensor 1 circuit.
- Or a faulty Engine Control Module (ECM).
Fixing Error Code p0135 Step By Step
Replace the faulty oxygen sensor in bank 1 sensor 1 to address fault code P0135.
- To fix OBDII code P0135, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to 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 voltage and resistance.
- Replace the faulty oxygen sensor if necessary.
- Clear the fault codes using a scan tool and test drive the vehicle to verify the repair.
Cost Of Fixing p0135 Fault Code
Diagnosing and repairing fault code P0135 typically involves testing and replacing the oxygen sensor.
The cost to diagnose and fix OBD code P0135 typically ranges from $75 to $150, based on a 1. 0hour repair time.
Factors like shop rates and the complexity of the repair can influence the final cost.
Details of the p0135 OBD Code
P0135 indicates a fault in the oxygen sensor heater circuit for Bank 1 Sensor 1.
OBD code P0135 means that the O2 sensor heater circuit malfunctioned in bank 1 sensor 1. This code is triggered by the Engine Control Module (ECM) when it detects that the heater element in the oxygen sensor is not functioning properly.
The oxygen sensor involved is the one located in the exhaust manifold before the catalytic converter on bank 1 of the engine.
The ECM monitors the heater circuit to ensure the oxygen sensor reaches operating temperature quickly for accurate fuel control.
Mechanic’s Tech Notes
Troubleshoot fault code P0135 related to oxygen sensor heater circuit malfunction in the vehicle’s engine.
To diagnose and fix OBDII code P0135, which indicates a fault with the oxygen sensor heater circuit in bank 1 sensor 1, start by checking the oxygen sensor fuse, wiring, and connector for any damage or corrosion.
Use a voltmeter to test the oxygen sensor heater circuit for proper voltage supply.
If voltage is present, the issue may lie with the sensor itself.
Consider replacing the oxygen sensor if all wiring and connections check out.
A scan tool can help monitor sensor data and confirm proper operation after repairs.
Remember to clear the fault code after completing the repairs to reset the Check Engine Light.
FAQ
OBD code P0135 means a faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1. Check sensor, wiring, connectors, and ECM for issues.
Common causes of OBD code P0135 include a faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, open/shorted harness, poor electrical connection, or faulty ECM.
Diagnose and fix OBD code P0135 by checking Bank 1 Sensor 1 H2OS and related wiring for faults. Inspect connectors and wiring for damage or corrosion.
Wrap Up
If your check engine light is on and you’re experiencing poor fuel economy with OBDII code P0135, it may be caused by a faulty oxygen sensor heater circuit.
This could be due to a bad oxygen sensor, damaged wiring, or a blown fuse affecting the sensor’s heater element.
To address P0135, start by checking the oxygen sensor’s wiring and connector for any signs of damage or corrosion.
Test the sensor’s heater circuit resistance and replace the oxygen sensor if necessary.
Ensure all connections are secure and the fuse related to the sensor’s heater is intact.
