What does trouble code p0446 on Chevy Silverado mean?

P0446 -What Does It Mean? (1999-2006 V8 Chevrolet Silverado, GMC Sierra) A trouble code P0446: Evaporative Control System Vent Valve Performance usually points to a blocked EVAP vent solenoid that isn’t able to draw fresh air into the EVAP carbon canister. In this tutorial I’ll explain what this trouble code means.

What does p0455 mean on a Chevy Impala?

P0455 Indicates that there is a large leak in the evaporative emission control system. It often appears with, or is related other codes, such as P0420, P0441, and very often P0440.

What does the OBDII code on a Chevy Silverado mean?

This trouble code references a number that is given to you when you plug your Silverado into a OBDII scanner. P0446 Indicates that there is a fault in the evaporative emission control system. It often appears with other codes, such as P0420, P0441, or P0440.

What causes the p0455 code on a Ford Expedition?

Evap System Hose – The hose that carries the fuel vapor from the fuel tank to the intake manifold can begin to leak. This will cause the P0455 code. Look for either a tear or hole in it. This is one of the most common issues that causes the code

What does the code p0455 mean?

P0455 is a diagnostic trouble code (DTC) for “System Gross Leak Evaporative Emission”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.

What does this code mean p0455?

P0440 is the general code for a problem with the Fuel Evaporative Emission System. The P0455 code specifically indicates a large leak in the system, not a fuel leak, but one in the vapor recovery system.

What does a DTC pending code of p0455 mean?

As stated elsewhere, code P0455 can also indicate a condition in which no fuel vapors flow through the system. In these cases on Ford applications, the most common cause is a defective charcoal canister vent valve that is stuck in the closed position, thus preventing engine vacuum from evacuating the EVAP system.

What causes an EVAP system code p0446?

Here are the most common causes of an EVAP System Malfunction or code P0446: 1 Malfunctioning vent control valve 2 Clogged vent valve 3 Control circuit issues (e.g., loose or damaged wiring) 4 Powertrain control module hardware or software issues (rather uncommon)

What is the trouble code on my Chevy Silverado?

P0446 Chevy Silverado. March 6, 2019August 7, 2018. One of the most common trouble codes with the Chevy Silverado is the P0446 code. This trouble code references a number that is given to you when you plug your Silverado into a OBDII scanner. P0446 Indicates that there is a fault in the evaporative emission control system.

What does the EVAP system on a Chevy Silverado do?

The purpose of the evaporative emission control (EVAP) system is to capture the fuel tank vapors and prevent them from escaping into the ambient air (the atmosphere). The EVAP system, on the 1999-2006 V8 Chevrolet Silverado (GMC Sierra), consists of following basic components: Gas cap.

Is there a P0420 code on my GMC Yukon?

P0420 is another common trouble code that accompanies P0446. P0446 code will typically not be accompanied by any noticeable symptoms. The service engine soon light will come on, but that is usually about it. You might (not very likely) notice a slight decrease in fuel economy. P0446 may also cause a slight gas smell.

How does the p0446 Chevrolet evaporative emission vent system work?

P0446 Chevrolet Meaning. The Powertrain Control Module (PCM) monitors the performance of the Evaporative Emission (EVAP) system by applying a predetermined level of vacuum to the EVAP system then monitors the vacuum decay rate.

What happens when the ECM detects code p0446?

When P0446 is triggered, the ECM has detected a short in the circuitry to activate the vent control valve, or the EVAP system failed to maintain the proper pressure during the active EVAP leak test. What Are The Symptoms Of P0446? What Is The Cause Of P0446? How Serious is Code P0446? – Low

Can a p0446 code cause a gas smell?

P0446 code will typically not be accompanied by any noticeable symptoms. The service engine soon light will come on, but that is usually about it. You might (not very likely) notice a slight decrease in fuel economy. P0446 may also cause a slight gas smell.

What causes the p0446 trouble code on a Chevy Silverado?

When the EVAP control system vent control circuit no longer responds to the ECU, it will throw the P0446 OBDII Code. There are many things that can cause the P0446 trouble code to trigger in your Chevy Silverado.

What does p0446 mean on a fuel pump?

Scan your vehicle to verify P0446 is the only code present. If other codes are present regarding fuel pressure or the fuel system, repair and diagnose those first. If it is paired with P0441, P0440, and/or P0446 there is most likely a solenoid failure, leaking charcoal canister, or a more complex EVAP leak.

When to repair a check engine light p0446?

The driver will likely not notice any symptoms associated with P0446 other than the check engine light being on. However, as with all check engine light diagnostic trouble codes, you should repair it as soon as possible to return the vehicle to normal operation. Scan your vehicle to verify P0446 is the only code present.

What is the code for the EVAP vent solenoid?

This feature is not available right now. Please try again later. Let’s have a look at this Chevrolet Cobalt that came with a code P0446 for the EVAP Vent Solenoid Performance. I have notice that most people will get sucked into the trap of changing parts based on code definition instead of code setting criteria.

What’s the trouble code on a Chevy Silverado?

What does diagnostic trouble code ( DTC ) mean?

Evaporative Emission Control System Vent Control Circuit Malfunction What does that mean? This diagnostic trouble code (DTC) is a generic OBD-II powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may vary depending on the model.

When is the p0446 Chevrolet code detected?

The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour. When is the P0446 CHEVROLET code detected? The Powertrain Control Module (PCM) sets the P0446 code if the vacuum decay rate is greater than a predetermined value.

What does p0446 do to the EVAP system?

During the leak test, the ECM closes the vent control valve to create a sealed EVAP system. When P0446 is triggered, the ECM has detected a short in the circuitry to activate the vent control valve, or the EVAP system failed to maintain the proper pressure during the active EVAP leak test. What Are The Symptoms Of P0446?

What does the p0446 code on a canister mean?

The vent valve will remain mechanically open in those cases, which will vent the canister all the time – setting a different code, such as a P0455. The P0446 is more likely to be a mechanically stuck closed vent valve or a mud dobber nest in the vent.

When is the p0506 Chevrolet code detected?

When is the P0506 CHEVROLET code detected? The P0506 code is sets when the Powertrain Control Module (PCM) detects an engine speed outside of the Idle Air Control (IAC) range of control. Engine Light ON (or Service Engine Soon Warning Light)

What causes a fuel injection code of p0449?

The following EVAP system faults can also cause a P0449 trouble code: 1 EVAP vent solenoid is not getting 12 Volts. 2 EVAP vent solenoid control circuit has an open-circuit or a short-circuit problem between the solenoid’s connector and the fuel injection computer’s connector. 3 EVAP vent solenoid’s electrical connector is damaged.

What are the common causes of DTC p0446?

DTC P0446 is defined as “Evaporative Emission (EVAP) Vent Control Circuit Malfunction.” What are the common causes of code P0446 ? Depending on year, make, and model, DTC P0446 may have number of causes. Here are some of the most common.

Why does p0446 cause fuel tank to crack?

Building their nests in the vent line blocks the flow, some of them so bad that they cause EVAP DTCs to be set, including P0446, and some so bad that they’ve caused canisters and fuel tanks to crack.

What does the p0442 code on a GMC Sierra mean?

The EVAP system captures all fuel vapor from the fuel tank and sends them to the engine’s intake in order to be ignited in the normal combustion process. When the GMC Sierra’s computer detects that the EVAP systemic not holding any pressure, it will throw the P0442 code.

Why does my GMC Silverado have a p0446 code?

Here’s a series of steps that worked for me to eliminate the P0446 code on my 2006 Silverado 2500HD 6.0. This code most often refers to a blockage in the EVAP vent system. This code is not associated with a bad gas cap or faulty EVAP Purge solenoid (on top of the intake manifold).

Are there any problems with the GM p0440 EVAP code?

Shops report problems with P0440, P0441, P0442, P0446 EVAP codes on GM vehicles. In order to troubleshoot any of the GM EVAP codes, it’s important to understand how the system works. The evaporative emissions system is designed to prevent raw gas vapors from entering the atmosphere.

What are the problems with the GM EVAP codes?

Diagnostics > By Trouble Code > P0440, P0441, P0442, P0446… Shops report problems with P0440, P0441, P0442, P0446 EVAP codes on GM vehicles. In order to troubleshoot any of the GM EVAP codes, it’s important to understand how the system works. The evaporative emissions system is designed to prevent raw gas vapors from entering the atmosphere.

What does trouble code p0446 on Chevy Silverado mean?