Question about 2002 Jeep Grand Cherokee

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Fuel cap code

Replaced cap but still getting code

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Large EVAP leaks are Many times the EVAP NVLD PUMP. It should be on the side of the charcoal canister. it can also be a EVAP hose that is not properly installed or cracked really bad. So it is important to inspect to entire system first. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

Posted on Feb 12, 2012

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Posted on Jan 02, 2017

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Computer code 455


Possible causes - Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking The P0455 it's a very common code, because the code is set if the gas cap is loose or missing. Start by tighten the gas cap and clearing the code. In most cases the code can be clear by disconnecting the car battery for about 30 minutes.

When is the code detected? EVAP control system has a very large leak such as fuel filler cap fell off, EVAP control system does not operate properly. Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors P0455 Buick Description This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition. The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.
if tightening the cap or replacing the cap does not help take your car to a shop to have it diagnosed as it requires special tools/equipment to test this and get an accurate results to find what needs replacing.

Oct 10, 2014 | 2004 Buick LeSabre

1 Answer

Code # PO446


P0446 Nissan - Evaporative System Canister Vent Control Valve Circuit
Possible causes - Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Vent control valve harness is open or shorted
- Vent control valve circuit poor electrical connection
- Faulty vent control valve

Tech notes Before replacing any parts, try re-tighten the gas cap and clearing the code. If the cap or cap seal is damage replaced cap and clear the code.


Apr 12, 2014 | Nissan Pathfinder Cars & Trucks

2 Answers

Fuel smell by driver side rear wheel


Very possible. The code for the fuel cap is probably one of the codes for a pressure leak in the gas tank vent system.
If it was not smelling before the brake repair, I would take it back to the shop that did the work.

Oct 15, 2012 | 1999 Cadillac DeVille

1 Answer

The check engine light came on & I went to autozone & they said the code was P0441 - EVAP emission control system purge flow fault, the woman said she had never seen that & that I should call...


This code does cause any dangerous condition, read what it means below plus possiable solutions.

P0441 - Evaporative Emission Control System Incorrect Purge Flow


Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors Possible causes - Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve
- Leak is in vacuum line between intake manifold and purge control valve. Possible solution - Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

Mar 22, 2011 | 2004 Dodge Intrepid

1 Answer

P0441 code


Toyota P0441 - Evaporative Emission Control System Incorrect Purge Flow

Possible Causes:
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve

Possible Solution:
- Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

Jan 14, 2011 | 2003 Toyota Corolla

1 Answer

I have no gears forward or reverse. My Vehicle is a 2003 Dodge Ram 1500 4x4 Hemi with 170,000 on the clock. Fluid is clean and full with no leaks. I have the following trouble codes:...


Your scanner will give you the code but it will not tell you how to fix your vehicle. Scanners basically tell you what systems to check or what systems are failing.

These are what your codes mean:

P0700: Transmission Control Module
- Shorted or open circuit within transmission control module (TCM)
- Failure of transaxle control module. This is just a informative code.

P0734: Gear ratio error in 4th gear
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0732: Gear ratio error in 2nd gear
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0731: Gear ratio error in 1st gear
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0871: Transmission Fluid Pressure Sensor Switch C

P0876: Transmission Fluid Pressure Sensor Switch D

Emissions Codes:

P0400: Exhaust Gas Recirculation Flow Malfunction
- Harness or connectors (EGR volume control valve circuit is open or shorted.)
- EGR volume control valve stuck closed
- EGR volume control solenoid valve
- Dead (Weak) battery
- EGR temperature sensor and circuit
- EGR Valve

How to fix :
- Clean EGR Valve
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve

P0440: EVAP Emission Control System Malfunction
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve

How to fix:
- Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

P0456: EVAP Control System Leak Detected (Very Small Leak)
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve

How to fix:
- Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

P0441: EVAP Emission Control System Incorrect Purge
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve

How to fix:
- Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

Based on the info check your EVAP system. I would check for leaks and maybe replace the EGR and the canister.

For the transmission check the TCM also you may need to take it to a mechanic though.

Hope this helps a little.

- Tech 101 (ASE CERTIFIED MASTER TECHNICIAN)
- Larson's Mobile Auto Repair
- 209-845-7620
- Oakdale, CA

Dec 31, 2010 | Dodge Pickup Cars & Trucks

1 Answer

For code#po442


evap system leak small most of the time this code comes from forgetting or properly replace their gas cap--others are gas cap not sealing replace cap-or a small leak in the fuel vapor lines -check cap and reset code if comes back check seal arund cap repair or replace if damaged -if good inspect the fuel lines and hoses for small cracks or damage repair or replace if necessary

Jan 20, 2010 | 1999 Volvo S80

1 Answer

Code 17 on a mazda 626 1992 lx what does it mean


The OBD-1 two digits trouble codes listed 'code-17' as:
Oxygen sensor.

This means that the fuel and ignition systems performance are in need of attention.

1.Distributor Cap: remove the 3-bolts holding the distriboutr to its body.
2. Inspect the distributor cap for cracks, and the roror-button is not worn or broken.
3. Inspect the distributor-cap terminals are not corroded or charred. Replace if charred. Clean them out if corroded.
4. Check the distributor-rotor for cracks or corrosion on its tip, and lesser spring tension.
Replace as necessary.
5. Reverse steps 1-4 to re-install distributor cap. Be sure to remove and replace the plug wires from the old distributor-cap to the new distributor-cap one-by-one. If not, the engine would not run.

Fuel-Filter:
1. Undo the top clips holding the fuel-filter hose, and undo the lower clips also.
2. Take out the fuel-filter from its mount.
3. Replace the fuel filter as necessary.(please not the way it was mounted) Reverse removal for installation.

Dec 11, 2009 | 1992 Mazda 626

2 Answers

Car codes


When you have P0440, P0441 and P0446, it is a very good bet that the fuel cap was loose, or the fuel cap rubber seal is compromised. You will get all three of those codes every time that the cap is loose. Always make sure that the fuel cap is as tight as you can get it after you refuel.

Nov 05, 2008 | 2001 Lexus RX 300

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