2000 Kia Sephia Check Engine Light - Kia Forum
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#1 (permalink) Old 04-27-2006, 02:20 PM
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I have a problem...My engine light was on Monday and I took it to Valvoline on that same day for an oil change and they checked it and told me I had code 0455 which was some sort of leak. They told me a mechanic would have to fix it and they reset it so the light was not on anymore. I had problems starting it yesterday.

I took it to a mechanic today for a diagnostic and he just called me and said he couldn't find anything wrong with it. Has anyone else had code 0455 or some type of exhaust gross leak. Please help me!!
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#2 (permalink) Old 04-27-2006, 02:37 PM
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I'm going to assume its P0455 which is this. Probably a loose gas cap. Start with this info and let us know if you can track anything down....
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#3 (permalink) Old 04-27-2006, 03:37 PM
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Thanks, I hope its just a loose gas cap.
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#4 (permalink) Old 04-27-2006, 03:39 PM
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P0455 Evaporative emissions gross leak detected

1) Fuel filler cap missing or loose.
2) Fuel filler cap o-ring damaged or missing.
3) Faulty or damaged fuel filler pipe.
4) Leaking fuel vapor lines.
5) Improperly installed or leaking Purge Solenoid Valve (PSV).
6) Leaking canister or catch tank.
7) Leak Detection Pump (LDP) body leaking.

1 Check fuel filler cap for being tightly installed, has o-ring seal installed and is in good condition. Verify cap releases pressure/vacuum at specified values (approximately 2 psi pressure and approximately 1.5 inches of mercury vacuum).
Are cap, o-ring and release pressures okay?

YES Go to step 2.
NO Replace fuel filler cap.

2 Check fuel filler pipe for cracks, pinholes, damage and o-ring seat for deformation.
Is fuel filler pipe okay?

YES Go to step 3.
NO Replace fuel filler pipe.

3 Per diagram "A", thoroughly check all fuel vapor hoses and hose clamps between:

1) Canister and rollover / ORVR valve.
2) Canister and LDP.
3) Canister and PSV.
4) 4-way Distribution Manifold and fuel filler pipe.
5) PSV and intake manifold. (Continued on next page)



(At this point, verify arrow on PSV is pointing towards intake manifold. If it is not, reverse installation.)
Are vapor hoses and clamps okay?

YES Go to step 4.
NO Replace ALL cracked / damaged hoses or loose clamps.

4 Turn ignition off, disconnect C254 from ECM and install adapter cable K99U-2106-G17 to BOB. Connect adapter cable C254 to ECM and harness C254 to adapter cable. Disconnect hose leading from PSV to intake manifold at PSV. Per diagram "B", draw a vacuum at nipple "B" with a mityvac (do not exceed 20" of vacuum) and verify PSV holds vacuum. Turn ignition on and jumper a wire from BOB pin 36 to GND (should hear a faint click from PSV). Vacuum should bleed off. Repeat this procedure 4 or 5 times to ensure PSV reliability.



Is PSV working properly?

YES Go to step 5.
NO Replace PSV and then go to step 5.

5 Return PSV hose to original condition. Disconnect C154 from PSV and prepare multimeter for current draw using 300 milliamp scale. Attach negative probe to chassis ground and positive probe to BOB pin 20.
1) Turn ignition on (engine off) and record LDP current draw (allow 5-10 seconds for current to stabilize). Minimum 17mA, maximum 36mA.
2) Jumper BOB pin 18 to chassis ground and observe current draw of LDP. Within 5 minutes, current draw should be greater than or equal to reference draw recorded in step 5a.

Was LDP current draw in step 5b greater or equal to current draw in step 5a?
YES Go to step 6.
NO Using appropriate evaporative emissions leak testing equipment, (or redo step 5 using an R-134A sniffer or exhaust gas analyzer) locate source of leak and repair as necessary.

6 Clear codes and return vehicle to original condition. Verify any repairs by driving vehicle with KIA Data Pro connected to OBD-II connector and monitoring for pending codes (refer to section 3 of the KIA Data Pro Generic OBD-II Program Card reference manual).

**I know this may be overkill...but I thought it might be helpful.

Elwood: It's 106 miles to Chicago, we got a full tank of gas, half a pack of cigarettes, it's dark and we're wearing sunglasses
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#5 (permalink) Old 07-14-2008, 05:54 PM
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Carlos, welcome to the forum.

The codes indicate that there's a problem with the O2 sensor.
When you say you put new "air sensors" in, do you mean the MAF (air flow sensor) ?

I would change the O2 sensor, and check that the spark plugs are the correct type and their gap set to 0.75mm (0.03").

Quality and not quantity counts.

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#6 (permalink) Old 07-28-2008, 02:39 PM
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I have a '98 Kia and the light has been on for years. I have put over 100,000 miles on it with the light on so it does not affect the performance.

I have replaced O2 sensors, etc. but light is still on. I can reset it but it comes back on.
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#7 (permalink) Old 07-28-2008, 08:00 PM
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Quote:
Originally Posted by jlo75142 View Post
I have a '98 Kia and the light has been on for years. I have put over 100,000 miles on it with the light on so it does not affect the performance.

I have replaced O2 sensors, etc. but light is still on. I can reset it but it comes back on.
Welcome to the forum.

It depends on what's causing the light to come on - there's many cases where the light is on and the ECU uses a 'limp home' value in place of a faulty sensors value, which in the case of the first O2 sensor being bad will result in a richer than normal mixture which does effect performance.

Quality and not quantity counts.

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#8 (permalink) Old 07-30-2008, 12:13 AM
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also don't forget some in some states that require emissions inspections the CEL being on is an automatic failure. if you're in a state or county in a state that doesn't require emissions testing consider yourself lucky that you don't have to fight with a CEL.

"One who is slack in his work is brother to one who destroys."
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#9 (permalink) Old 01-03-2010, 10:49 PM
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Quote:
Originally Posted by jlo75142 View Post
I have a '98 Kia and the light has been on for years. I have put over 100,000 miles on it with the light on so it does not affect the performance.

I have replaced O2 sensors, etc. but light is still on. I can reset it but it comes back on.
check the cat converter. if your ever so "lucky" like me, you may have 2 converters. i replaced both to find that the most expensive one, which was the second one i reaplaced, was the culprit
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#10 (permalink) Old 03-08-2010, 11:41 AM
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Cool Car Engine LIghts Blazin

With regards to Code P0455 - looking over many of the note on this subject, I couldn't help droping in my 2 cents . . for what it's worth, I came across a 'Fuel Filter LDP' in a diagram of the engine specs..... This turns out to be more of a PUMP.... LDP = Leak Detection PuMP.... again, not a real genius here, but could this be some element malfuntioning or needing some replacement? It sits right above the PVC hose on the Spectra 2000. I just thought this to be somewhat helpful to those frustrated with undistinguishable codes and the insane mazes left for mechanic to figure out on their own... Good Luck to all......

or

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