P0470 Purge Flow Sensor Circuit Intermittent

Everything You Need to Know About P0470 Purge Flow Sensor Circuit Intermittent

If you’re a car owner, there’s a good chance you’ve encountered the dreaded check engine light at some point. It’s a sign that something’s not quite right with your vehicle, and it can be a source of stress and anxiety.

One of the potential causes of a check engine light is the P0470 code, which refers to an issue with the purge flow sensor circuit. In this article, we’ll take a closer look at what the P0470 code means, what causes it, and what you can do to fix it.

What is the P0470 Code?

The P0470 code is a diagnostic trouble code (DTC) that indicates that there’s an issue with the purge flow sensor circuit. The purge flow sensor is a component of the evaporative emissions system, which is responsible for controlling the release of fuel vapors into the atmosphere.

The purge flow sensor measures the flow of vapors from the fuel tank to the engine, and if it detects a problem, it will trigger the P0470 code and illuminate the check engine light.

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What Causes the P0470 Code?

There are several potential causes of the P0470 code. One common cause is a faulty purge flow sensor. Over time, the sensor can wear out or become damaged, leading to inaccurate readings. Another possible cause is a clogged or blocked fuel vapor hose. If the hose is blocked, the flow of vapors will be restricted, which can cause the sensor to trigger the P0470 code.

Other potential causes of the P0470 code include a faulty purge solenoid, a damaged or corroded wiring harness, or a problem with the powertrain control module (PCM). In some cases, the code may be triggered by a software issue, which can be resolved by resetting the PCM.

How Do You Fix the P0470 Code?

If you’ve been hit with the P0470 code, the first step is to diagnose the problem. This typically involves using a diagnostic scanner to read the code and determine the cause of the issue. Once you’ve identified the problem, you can take steps to fix it.

One common fix for the P0470 code is to replace the purge flow sensor. This is a relatively simple and straightforward repair that can be done by a qualified mechanic. If the fuel vapor hose is clogged, it will need to be cleaned or replaced. In some cases, the purge solenoid may need to be replaced as well.

If the wiring harness is damaged or corroded, it may need to be repaired or replaced. This can be a more complex repair, as it may require tracing the wiring through the vehicle and identifying the source of the problem. Similarly, if the PCM is at fault, it may need to be replaced or reprogrammed.


The P0470 code can be a frustrating issue for car owners, but it’s important to remember that it’s not the end of the world. With a little bit of diagnosis and some basic repairs, you can get your vehicle back on the road and running smoothly. If you’re not comfortable making the repairs yourself, don’t hesitate to take your car to a qualified mechanic. They’ll be able to diagnose the problem and recommend the best course of action.


  1. What does the P0470 code mean?
    The P0470 code refers to an issue with the purge flow sensor circuit in the evaporative emissions system.
  2. What causes the P0470 code?
    The P0470 code can be caused by a faulty purge flow sensor, a clogged fuel vapor hose, a faulty purge solenoid, a damaged wiring harness, or a problem with the PCM.
  3. How do you fix the P0470 code?
    The P0470 code can be fixed by replacing the purge flow sensor, cleaning or replacing the fuel vapor hose, replacing the purge solenoid, repairing or replacing the wiring harness, or replacing the PCM.
  4. Is the P0470 code serious?
    While the P0470 code isn’t an immediate threat to your vehicle, it’s still important to address the issue as soon as possible to prevent further damage.
  5. Can I drive with the P0470 code?
    While you can technically drive with the P0470 code, it’s not recommended. The issue can cause decreased fuel efficiency and potentially more serious problems down the line.