Chevy Silverado P015D: Meaning, Causes, Symptoms, & Diagnosis

Whenever my Chevy Silverado’s engine malfunctions, I can swiftly detect the problem using an OBD-II scanner. Here I want to discuss a specific code. What if my scanner displays a P015D error code. This error is a generic trouble code that applies to all cars, including the Chevy Silverado.

The p015d 2013 Chevy Silverado code means that the PCM has identified a delayed reaction time from the upstream oxygen sensor. My O2 sensor has undoubtedly failed in this case, but it might also be due to defective wiring, a broken or clogged catalytic converter, or other exhaust difficulties.

If my catalytic converter hasn’t already broken, it’s likely to fail soon; that is why I must evaluate my Silverado as quickly as possible because a defective oxygen sensor can swiftly cause other, exponentially more expensive repair problems. And if anything like this happens, the diagnostic trouble code (DTC) P015D  will most likely appear on my scanner. Here is a complete breakdown of this code’s meaning, causes, symptoms, and solutions.

p015d 2013 chevy silverado

What Does the p015d 2013 Chevy Silverado Code Mean?

The P015D means that there is a delayed reaction in the oxygen sensor. When the oxygen sensor in the car fails to provide the expected feedback to the PCM, the code is activated. The powertrain control module (PCM) expects the oxygen sensor to relay data at predetermined intervals.

It requires this information from the oxygen sensors to operate the engine properly. Therefore, it will be unable to calculate the needed air-fuel ratio and ignition timing settings if the oxygen sensor fails. This code is related to oxygen sensor 1, which examines the exhaust emissions of engine bank 2.

Causes of the Chevy Silverado P015D Code

Despite being labeled as an oxygen sensor defect, various other issues can cause the P015D code. They include:

  • Leaking exhaust
  • Oxygen sensor malfunction
  • The PCM is defeated.
  • Problems with the wiring.
  • Catalytic converter failure (not to be mistaken for one of the 2014 Silverado transmission problems)

Identifying the p015d Code

The most common symptoms of this code are:

  • The efficiency of fuel has dropped
  • The engine’s performance is subpar
  • The check engine light comes on
  • Other oxygen sensor-related engine fault codes may be an early sign

Decoding Code P015D

The requirement to investigate multiple components may make determining the root cause of the P015D code challenging. Accessing and testing features like the oxygen sensor and the PCM may require specialized knowledge or equipment.

What should I Do?

To diagnose a P015D code, I would need a diagnostic scanner (available on Amazon), a digital volt/ohmmeter (DVOM), and a trusted vehicle information source.

Before diagnosing code P015D, I analyze and repair engine codes like the sensor codes for mass airflow(a p0102 Chevy Silverado code ). My engine will record multiple error codes when it fails to start. So here is what I do:

  1. I start by visually evaluating the system’s wire harnesses and connectors. I pay special attention to harnesses near hot exhaust pipes, manifolds, and sharp edges like those found on exhaust shields.
  • Check my vehicle’s information source. If I discover one that matches the symptoms or error codes displayed by my Chevy Silverado, it will help me diagnose the issue.
  • I then connect the scanner to the vehicle’s diagnostic port, retrieve all recorded error codes, and freeze frame information. I must save this information because it may be helpful if the P015D is intermittent.
  • Next, I clear the error codes and make sure that my engine has reset the P015D code. If my engine has cleared the code, I will start it and let it reach the average operating temperature before allowing it to idle (with the transmission in neutral or park).
  • Examine the oxygen sensor input data using the scanner’s data stream. Once I limit the data stream display to only relevant data, I should notice a faster and more exact data response. The signal from the upstream oxygen sensor should oscillate between 1 and 9 millivolts (.100 and.9 volts) if the engine is usually working (.900-volts). A P015D is stored if voltage variations are slower than expected.
  • Connecting the DVOM (price available on Amazon) test leads to the O2 sensor’s ground and signal wires to view live sensor data. I can also use it to test the oxygen sensor’s resistance, voltage, and ground signals. I will have to disconnect the relevant controllers before testing system circuit resistance with a DVOM to avoid damage to the control module.

What Should I be Cautious About

Since I choose to perform a self-diagnosis, I must be cautious for the following reasons.

  • The oxygen sensors should not cycle as frequently as those upstream after the PCM enters closed-loop operation.
  • I will avoid replacing my catalytic converters with refurbished ones.

However, I may have to seek professional assistance to diagnose the P015D error code on my Chevy Silverado correctly.

How to Fix the P015D Code

Deciphering a P015D code can be a frustrating and complicated procedure without the necessary materials and knowledge. Nonetheless, there is no one-size-fits-all solution for each OBD-II error code. If unsure of my DIY talents, I always hire a professional since it would be the best approach.

But since I believe I have the automotive knowledge to do the repairs, I would just study my vehicle’s manual first. These are the steps I take to repair the DTC.

  1. Like a skilled professional, I will use my scan tool to check for the p015d code.
  • Next, I will look for any freeze frame data associated with the p015d code.
  • I should then decode the freeze frame data using my car’s manual.
  • Finally, my Chevy Silverado engine should remove the problem once I decode the data.


I have included some other related questions that people ask concerning the p015d code. They include the following:

How serious is the P015D code?

The p015d code is serious because it implies that the oxygen sensor was unresponsive or slow for an extended period. It is preferable to diagnose and fix the problem as soon as possible.

How much does it cost to diagnose a P015D code?

The diagnosis of the P015D Chevrolet code costs one hour of labor. Auto repair firms often charge between $75 and $150 per hour.

Can I drive if my oxygen sensor is faulty?

Even if it has a faulty oxygen sensor, I can still drive my vehicle. It will reduce the vehicle’s performance until I make repairs.

How often should I replace my oxygen sensors?

Oxygen sensors in any vehicle built after 1996 can endure for at least 100,000 miles before needing to be replaced.

Final Thoughts

When there is a delayed reaction from my oxygen sensor, a p015d 2013 Chevy Silverado code will appear. This code is quite severe, so I should not delay fixing it. Scanning my oxygen sensors should give me access to its freeze frame data which I can decode by following the manual. Once I decode the data, the delayed reaction in my oxygen sensor should stop.

Hi, this is Johnny Norris grew up in a car-oriented family. I love helping people by solving different problems they face in their Chevy car. Following my suggestions, how-to guides, you can save up on a lot of money that would have been spent on paying a professional.