What is the problem obd2 codes 9 and p0440 on 2003 pt cruiser
Hi there:
DTC P0440 - Evaporative Emission Control System Malfunction
This is caused by a vapor lean in the fuel system. A loose or not sealing gas cap can cause the problem.
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SOURCE: p0440,p0441,p0446
These codes are all for the Evaporative Emissions System.
P0440- Evaporative emissions system fault- just saying there's something wrong with the system.
P0441- Evaporative emissions system- Incorrect purge flow- saying that the system isn't purging the raw fuel vapors (hydrocarbons- HC) as well as it should.
P0446- Evaporative emissions system- Control valve circuit low- there is a valve, usually located on the charcoal canister at the rear of the vehicle, that opens to allow fresh air to enter the evaporative emissions system as the engine vacuum purges the fuel vapors from the charcoal canister and closes when purge is not needed to prevent leakage of those fuel vapors to the atmosphere (HC is a greenhouse gas and is regulated as such by the fed gov't).
Given that you have the incorrect purge flow code and the control valve code together, my bet is that the vent control valve has failed (causing the P0446) and is not opening to allow fresh air into the system to displace the air from within the system that is being pulled to the engine. Since you have no fresh air entering the system, the engine will pull a vacuum on the system instead of the vapors "flowing" into the engine (causing the P0441).
I hope that this is helpful to you!!!
ASE Master Technician with L1 and X1 Certifications; Nissan Scope Technician; Chrysler Level 3 Silver Technician- 12+ years experience.
SOURCE: engine light on PO441, PO344 and PO440 were the codes that came up. 2003 PT cruiser
P0440 and P0441 are refering to the NVLD pump. It is in the rear on the right side up near the fuel tank. P0344 is your cam position sensor on the rear (drivers side) of the cylinder head. The P0440 and 441 are probably why the check engine light is on and the 344 was stored from a previous event. Either way they are two different and unrelated problems. The NVLD (natural vacuum leak detection) pump is an emission item with no effect of the way it runs however it will keep the engine light on. The cam sensor will keep it from starting or intermittently run bad and not necessarily turn the light on. Both parts are easy to change. I hope this helps.
SOURCE: check engine light on and code po108
PO108 (map circuit high input) MAP is manifold absolute pressure... a sensor normally mounted on the intake. your code is suggesting a problem with this sensor, or its circuitry.
SOURCE: what does this DIAGNOSTIC code P01A4 for pt
The engine management light comes on to inform you that the engine is
not working correctly and it stores a fault code in the ECU with
information on what is wrong. You can only access this information via
a diagnostic device.
If the DME (engine) ECU keeps on
seeing a fault on the engine operation it then goes into limp mode to
protect the engine from damage (low power or stops) when you cycle the
ignition it can reset the ECU and the process starts again (depending
on what the fault is).
I remember something about some codes being in hex or base sixteen so
did a hex to decimal conversion and got 420... Car is not strictly obd compliant as I think 03 onwards for diesel but I think the code is hex so should be p0420. If it is, cat below efficency, check what the lambda after cat is showing in live data.
I advise you to take your car to a
Chrysler main dealership or specialist to have a real time diagnostic
check done so a full diagnose can be given (this will have a set charge
of approx 20 mins labour).
It could be a failed part on the engine system or just a software glitch that will require an ECU programme update.
Hope helped.
Testimonial: "will go to chrysler thanks Drew McNeil"
SOURCE: "Check Engine light"
The issue is that the system randomly checks the loop of the fuel system to confirm that it has no leaks. A missing cap is the easy one to correct. It might also be a slpit in the rubber hose that connects the fuel fill tube (on the chassis) to the one on the tank, or any other hose in the the entire fuel delivery/ fume recovery sysrtem. The solenoid that allows the engine's vacuum to be used to conduct this test can also be sticking so that after the test cycle, it doesn't reclose. Good luck
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