What is the P0135 fault number? What is the Oxygen O2 Sensor Circuit Malfunction (Bank 1 Sensor 1).? How can you fix P0135 fault codes? What are the symptoms and causes for the P0135 fault code
What is the P0135 fault code?
The engine control module (PCM/ECM/ECU) checks the oxygen sensor heater for short circuits, overcurrent and open circuit during engine start-up. If the PCM detects an issue with the O2 sensor circuit bank 1, it will emit a code P0135.
Your vehicle’s O2 sensor monitors the ratio of air and fuel. The sensor information is used by your car’s computer to control the fuel mixture and reduce emissions. However, the sensor must be sufficiently hot to allow this to occur. The O2 sensor is equipped with an integrated heater circuit that can reach the desired temperature as soon as the engine is cold. Fault code P0135 will be generated if this circuit fails to work properly.
What are the symptoms of P0135 Fault code?
- – Check Engine malfunction light illuminates
- Until the O2 sensors transmit a signal, there won’t be any O2 sensor feedback from ECM.
- – The engine may run irregularly until the exhaust heats up sufficiently to activate the O2 sensor.
- Engine misfire
What is the P0135 Fault Code and Why Does It Happen?
- – Very high resistance in O2 heater elements or O2 circuit wires
- – O2 heater: Short circuit or open circuit
- – Damage to or short circuit in wiring harness
- – Defective oxygen sensor
The engine control module (PCM/ECM/ECU) checks the O2 sensor heater circuit when you start the engine. If there are any malfunctions or delays detected by the PCM, it will issue malfunction code P0135.
How do I fix the P0135 fault code?
You can either fix the problem by replacing the wiring or troubleshooting the O2 circuit wiring. The problem can be solved by resolving short-circuit or open-circuit issues. This part must be replaced if the oxygen sensor is damaged or opens. Failing O2 sensors can cause engine problems, increased emissions, and permanent damage.
- – You should visually inspect the wiring harness and electrical connections to bank 1 sensor 1O2 sensor.
- To check if the heater circuit works, you should monitor O2 sensor data.
- For proper input voltage from the PCM, O2 sensor connector must be tested.
- – You should test the resistance of your O2 sensor heater circuit.
- – Once the short circuit has been rectified, you should change the fuse in your heater circuit.
- – Repair or replacement of the O2 sensor cable or O2 sensor connections.
- – The O2 sensor needs to be replaced.
What is the significance of P0135 Fault code?
O2 sensors play a crucial role in the proper air/fuel mixture for an engine to run. The O2 sensors directly affect the PCM’s ability adjust the fuel mixture. The O2 sensors will cause the PCM to remain in an open loop until it is fixed. This will cause your engine to run extra rich, consume more fuel and create carbon.
