5 Simple Steps to Fix P0135 Engine Code

How to fix the engine code P0135

P0135 is a common OBD-II code that indicates that the oxygen sensor heater circuit for bank 1 sensor 1 has a malfunction. This can be caused by a number of things, including a bad oxygen sensor, a wiring problem, or a problem with the engine control module.

To fix the code, you will need to diagnose the problem and replace the faulty component. This may require a professional mechanic, as it can be difficult to track down the source of the problem.

So How Do I Fix The Engine Code P0135

1. Check the oxygen sensor voltage.
2. Check the oxygen sensor wiring.
3. Replace the oxygen sensor.
4. Clear the P0135 code from the computer.
5. Test drive the vehicle to see if the code returns.

How to Fix Engine Code P0135

What is Engine Code P0135?

Engine Code P0135 is a generic OBD-II code that indicates that the oxygen sensor heater circuit for Bank 1 Sensor 1 is malfunctioning. This means that the oxygen sensor is not heating up to its proper operating temperature, which can affect the vehicle’s fuel economy and emissions.

What Causes Engine Code P0135?

There are a number of things that can cause Engine Code P0135, including:

A faulty oxygen sensor
A damaged wiring harness
A bad connection between the oxygen sensor and the PCM
A problem with the PCM itself

How to Fix Engine Code P0135

The first step in fixing Engine Code P0135 is to diagnose the problem. This can be done by using a scan tool to read the codes and check the oxygen sensor voltage. If the oxygen sensor is reading a voltage that is too low or too high, it will need to be replaced. If the wiring harness or the connection between the oxygen sensor and the PCM is damaged, it will need to be repaired or replaced. If the PCM itself is the problem, it will need to be reprogrammed or replaced.

How to Prevent Engine Code P0135

There are a few things you can do to help prevent Engine Code P0135, including:

Keeping your vehicle well-maintained
Replacing your oxygen sensor according to the manufacturer’s recommendations
Avoiding driving through deep water
Avoiding driving on rough terrain

Conclusion

Engine Code P0135 can be a frustrating problem, but it can usually be fixed by diagnosing and repairing the underlying cause. By following the steps in this article, you can help keep your vehicle running smoothly and avoid costly repairs.

FAQs: How Do I Fix the Engine Code P0135?

What does the P0135 code mean?

The P0135 code is a generic OBD-II code that indicates that the oxygen sensor heater circuit for the downstream oxygen sensor (sensor 2) is malfunctioning. This means that the heater circuit is not providing enough heat to the oxygen sensor, which can cause the sensor to provide inaccurate readings.

What causes the P0135 code?

There are a few different things that can cause the P0135 code, including:

A faulty oxygen sensor heater
A damaged wiring harness for the oxygen sensor heater
A loose or corroded connection between the oxygen sensor heater and the wiring harness
A problem with the PCM (powertrain control module)

How can I fix the P0135 code?

The first step in fixing the P0135 code is to diagnose the problem. This can be done by:

Checking the resistance of the oxygen sensor heater
Checking for damaged wiring harnesses
Checking for loose or corroded connections
Inspecting the PCM for any problems

Once the problem has been diagnosed, the next step is to fix it. This may involve replacing the oxygen sensor heater, repairing the wiring harness, or replacing the PCM.

What are the symptoms of the P0135 code?

The symptoms of the P0135 code may include:

A check engine light
A decrease in fuel economy
A rough idle
A loss of power

Is the P0135 code serious?

The P0135 code is not a critical code, but it can lead to decreased fuel economy and performance. It is important to have the code diagnosed and fixed as soon as possible.