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Re: 2001 hyundai sonata
The evaporative emissions system prevents
hydrocarbon (HC) vapors from the fuel tank from escaping into the
atmosphere where they could form photochemical smog. Gasoline vapors
are collected in the charcoal canister. The Canister Closing Valve
(CCV) closes off the air inlet into the canister for leak detection of
the evaporative emission system. The CCV also prevents fuel vapors from
escaping from the canister. When the engine purges the HC vapors from
the canister, the clean air comes into the canister through the
canister air-filter and the CCV.
1.Ignition "OFF".2.Disconnect CCV
connector.3.Measure resistance between terminals 1 and 2 of the CCV
connector(Component side).Specification : Approx. 23~26Ω at 20°C(68°F) 4.Is resistance within the specification?YES▶ Go to next step as below.NO▶ Check CCV for contamination, deterioration, or damage.
Substitute with a known-good CCV and check for proper operation. If the problem
is corrected, replace CCV and then go to "Verification of Vehicle Repair"
procedure.Terminal and Connector Inspection Many malfunctions in the electrical system are caused by poor
harness(es) and terminals. Faults can also be caused by interference from other
electrical systems, and mechanical or chemical damage. Thoroughly check connectors for looseness, poor
connection, bending, corrosion, contamination, deterioration, or
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Definition of P0420 is catalyst below threshold. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). Catalytic converters are not normally a "wear" type item, that is they are not deisgned to wear out and need replacement. If they have failed, it is likely due to something else that caused it to fail.
P0447 Evaporative Emission Control System Vent Valve/Solenoid Circuit Open. The Powertrain Control Module (PCM) has detected an open within the circuit that controls the vent valve or solenoid for evaporative emission systems vapor.
MIL is your malfunction indicator lamp, (check engine light)
CMD is the computer interface port, or OBDII port indicating a malfunction communicating with your cars computer
check all the fuses, primarily any marked pcm and retest your vehicle
note: your check engine or MIL has to be on in KOEO state (key on engine off), if the bulb is burned out everything will still work and the OBDII test computer will show MIL status ON, and if you don't have a computer to tell you that, you must get that light to light in the koeo state.
You can try disconnecting the battery for a minute then driving about 15-20 miles on the highway while trying to stay at about 55. This will often rebalance the sensors in the emissions system. Note: you must drive the minimum distance required by your ECU, or you'll fail inspection automatically due to lack of adequate feedback from your your OBD.
First the fault codes, U110C is No Fuel Level Bus Message U0155 is No Cluster Bus Message. Unfortunatly you have to be able to communicate with the instrument cluster with your scanner to diagnoise and I do not think an aftermarket scanner can do this.
If you have an EVAP leak, you will get the following codes:
1. P0442 evap emission control system leak (small). 2. P0455 evap emission control system leak (large).
If these codes come up, you need to trace the leak. The most common place for the systems to leak besides the gas cap is at the service port under the hood, the hoses at the purge solenoid, and the hoses around the fuel tank. Check all your EVAP hoses from under the hood , all the way back to the gas tank. You can repair a split hose easily. Buy some 14.5mm EVAP hose at the auto parts store. Just cut the split or cracked section out and attach the new hose. I can only say that u must fix the code issue and light to pass state emission test, if u reset the light they will know, the system will tell the tester that the system is not ready, this will cause a fail.
CA you can take the car to a referree and get a one time waiver if you have spent a minimum of $450 on repairs not including smog fees. Gives you two years to get it fixed.
Smog Referee Call Center Toll Free: 1.800.622.7733
You can also sell the car to the state for "up to" $1,000