Q: Carbon canister making a loud hissing noise.

asked by on November 07, 2016

check engine light was on ( bank 1 system too lean p0171 )and someone suggest to change the carbon canister and now it's making a loud hissing noise. The old one made a low level hissing noise. How can I fix this? The canister is OEM purchased new.

Thx Shawn

My car has an automatic transmission.

Hi there. The loud hissing noise could be caused by a split vacuum hose or a loose hose. Follow the hiss to make sure it is the canister and not a separate hose. The code stored for the Check Engine Light would not be affected by a leak at the canister because it would have leaked to bank 1 and bank 2 setting a code for each. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. YourMechanic has several available technicians that can assist you with a Check Engine Light inspection and can conduct a diagnostic on the hissing noise so that this can be addressed appropriately.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

engine has been overheating.

If you suspect a head gasket leak, the only way to confirm that is an on-site diagnostic. If you want to rule the head(s) in or out as the site of a cooling system leak, the recommended service is an...

When I take off from a stop I hear a banging noise 2013 Jeep Wrangler V6

Hello - there are a couple of possibilities for the noise you hear upon acceleration: a broken torque converter (internal failure), engine shifting due to broken motor mounts and fan hitting something, transmission shifting due to broken mounts, allowing the...

Will a u140e trans from a 99 Lexus es300 interchange with a 99 Lexus RX 300? Fwd?

Although the transmission type is the same (U140-E), the two vehicles have different Tag ID numbers on the transmissions and thus the two referenced transmission are NOT listed in the catalog as "interchangeable". Different Tag ID's reflect differences in electrical...

Check Engine Light is on

Your check engine light may come on for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter, bad spark plugs or wires and many other reasons. Unfortunately due to the...

What else can it be besides the fuel pump, relay, and fuel filter if my tahoe putts

The check engine light means the ECM has stored a code in memory. The code may be indicating the problem causing the problem you are having. The problem sounds like you are having an issue with the fuel control, such...

MY 1998 ford escort coupe will not move in drive but will move in reverse and low. Put transmission fluid in it it still does not

Hi Patricia. Thanks for the additional information. An issue like this is often an indication of either an internal seal that is leaking inside the transmission, a damaged torque converter or a damaged shift solenoid. Sometimes it just a problem...

My car's gas pedal goes out and the car won't drive anymore if my RPM reaches the number 3 on the gauge.

Hello, I would start by extracting the problem codes from engine management and the transmission as well. You don't mention it, but surely the Check Engine light is on at this point. These codes will help determine a strategy for...

Passing gear

You should have the computer scanned and transmission linkage checked to see if the system has codes stored for transmission and shift linkage is not damaged and adjusted properly.

Dying when idling too long and whining noise while revving

Hey there. In many cases, whistling or whining noises can come from the belt drive system or a vacuum leak under the hood. Is your vehicle maintenance and tune-up schedule up to date? You may want to check the idle...

Related articles

P0925 OBD-II Trouble Code: Gear Shift Reverse Actuator Circuit Range/Performance
P0925 means there was an abnormal voltage reading from the gear shift reverse actuator circuit due to faulty reverse gear guide rail or shift shaft.
P0323 OBD-II Trouble Code: Ignition/Distributor Engine Speed Input Circuit Intermittent
Trouble code P0323 means the powertrain control module (PCM) detects an erratic signal from the crankshaft position sensor or the distributor.
P2729 OBD-II Trouble Code: Pressure Control Solenoid E Control Circuit Low
P2729 means a solenoid has malfunctioned due to a failing transmission, faulty sensors or solenoids, low fluid levels or electrical issues