Codes P0302, p018, PO108 and PO113?

Tiny
ANN SENN
  • MEMBER
  • 2013 HYUNDAI VELOSTER
  • 1.6L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 75,000 MILES
Okay, pulling codes p0302, p018 PO108 PO113. I have replaced all four ignition coils and spark plugs with OEM parts. I have also replaced the crankshaft and camshaft sensors, the MAP sensor. I've done a leak down test which came back fine had a little bit of oil consumption and some on the tips of the spark plugs but not much. I had just done an oil change 5 to 800 miles ago, so the oil is fine. I did do a spark test on each cylinder also and they were all fine parts that were replaced maybe two years ago include both of the fuel pumps the fuel filter the fuel injectors the purge valve I think that's it so not real sure where else to go. I'm going to put a new connector and wiring to the MAP sensor and the ECM was recently replaced as well, but the misfire is like a continuous misfire almost, so I'm not understanding why that's the way it is. There's new connectors on all four of the ignition coils as well and I checked and made sure they were all getting power and continuity was going to each one and the resistance is fine as well on all components I also cleaned out the throttle body and the inside of the intake manifold and it really didn't have much carbon build up in it I expected there to be more. There is a second camshaft sensor I'm also going to check that one today that one I did not replace I actually didn't realize there was a second one until I'd already ordered the other one which had quite a bit of oil on it as well I believe it should have been kind of see-through where the meshy part is and it was dark.
Friday, May 10th, 2024 AT 3:49 AM

36 Replies

Tiny
ANN SENN
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Codes were P0302, P0108 and P0113.
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Friday, May 10th, 2024 AT 3:53 AM
Tiny
AL514
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Hello, the codes setting, p0108 and p0113 are both related, I'll post a wiring diagram for you, but the cylinder 2 misfire code may not be related, where did you buy your parts from when trying to get rid of this misfire?
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Saturday, May 11th, 2024 AT 11:09 AM
Tiny
AL514
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Is your check engine light blinking when it sets the misfire code? The other 2 codes are for the MAP sensor and intake air temp sensor which are combined into one sensor, so the sensor may have a bad ground, since the MAP sensor part is indicating a "Signal High" and the IAT part of the sensor is indicating a "Signal Low".
This is the OEM for the MAP/IAT sensor, with it unplugged, key On, engine Off. You should read 5volts across pins 2 and 4 with a multimeter set on DC volts. Thats the first check I would do.

https://www.2carpros.com/articles/how-to-use-a-voltmeter
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Saturday, May 11th, 2024 AT 11:27 AM
Tiny
AL514
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The MAP sensor is on the Throttle Body, just behind the throttle plates, since it measures intake manifold pressure. It's a 4-wire sensor. As for the misfire, if you have replaced the ignition coil, plug and fuel injector, that pretty much leaves, either there is a control problem with one of those components such as wiring. Or there is a compression issue. And a static, only cranking compression test may not always reveal the issue. If there is a valve sticking partially open at certain times, it can be difficult to catch. You can try pulling the spark plug out and putting a bore scope down the spark plug hole to take a look into the cylinder, to see if you notice anything that looks odd.
I would also like to see if your scan tool is counting misfires at a certain time, or under a certain engine load.
Also check if the engine oil smells like gas, if it's been misfiring for a while the oil will be diluted with gas, especially on a GDI system. The top of the intake valves also develop carbon build up excessively on these systems with the GDI injectors spraying directly into the cylinders and not into the intake which helps to clean the valves.
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Saturday, May 11th, 2024 AT 12:43 PM
Tiny
ANN SENN
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I removed the intake manifold and also the spark plugs and looked down in there they are really was not much carbon buildup I was surprised in the cylinders base or the intake valves.
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Saturday, May 11th, 2024 AT 10:27 PM
Tiny
ANN SENN
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I didn't mean to send that yet. I did however clean that that was in there. As far as map sensor it almost has to be something in the wiring, I'm going to check that also today I've checked the resistance and the continuity going to the ECM, but I'll check for a bad ground and the voltage. I'm going to switch around a couple of the injectors because I had an issue with cylinder two a year or so ago as well when I had my connectors changed, he switched one of them and it was melting the coils in cylinder two. Obviously that it's been fixed but I'm wondering if it could have caused damage or build up in the fuel injectors since it's just in the one cylinder.
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Saturday, May 11th, 2024 AT 10:30 PM
Tiny
AL514
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That's unfortunate, you can swap the injector, or a quick test is to see if the control wire on the number 2 coil has a direct path to ground when the vehicle is off. Just disconnect the coil plug and do a continuity check to battery negative. With the 2 wire coils, when they short out, sometimes they burn the coil driver inside the ECM. I have seen that many times, and that's what happens, the new coils get really hot because they are on all the time, not being pulsed by the ECM under proper control. With that code setting, the ECM may be deactivating the fuel injector for the #2 to prevent Catalyst damage. But when the coil driver MOSFET (transistor) burns out, they will go straight to ground or open circuit inside the ECM. Most of time I see them just burn the transistor and it's a straight path to ground. I'm surprised these coils don't have a transistor inside them, you would expect by 2013 they would have gone over to a more advanced coil set up to prevent ECM damage.
Let me know if you need any other wiring diagrams.
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Sunday, May 12th, 2024 AT 9:39 AM
Tiny
ANN SENN
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I took injectors out and cleaned and tested them #2 was bad so had an extra one and replaced it along with a new gasket on the manifold. I'm going to check the MAP sensor wiring this morning.
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Monday, May 13th, 2024 AT 6:09 AM
Tiny
ANN SENN
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Yikes, I'll check to coil continuity just to make sure, but I hope not. Just replaced the ECM.
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Monday, May 13th, 2024 AT 6:12 AM
Tiny
AL514
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Well, it sounds like your #2 injector was bad, does it still set the p0302 with a different injector in there?
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Monday, May 13th, 2024 AT 12:48 PM
Tiny
ANN SENN
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It's not throwing a code but I'm thinking the replacement may be stuck open. I'm getting white smoke, and the car barely accelerates. Do you have the specs that I can compare to the live data? Maybe help pinpoint the issue don't think it's a blown head gasket not losing coolant but will check oil and check for bubbles with radiator cap off.
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Wednesday, May 15th, 2024 AT 7:27 AM
Tiny
AL514
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If you think a fuel injector is stuck open, pull up live engine data on your scan tool, and monitor the Fuel Rail Pressure data PID, it has to have one, this being a GDI system. If you can graph that data PID it would be best, then shut the vehicle off but turn the key back on, engine off so you can still see the live data and watch for the Fuel Rail pressure to drop off fast. That's a sign an injector is staying open mechanically. Now if the injector driver in the PCM is burned, and the injector control is constantly grounded, the injector will stay on constantly but only when the engine is running.
Here is the GDI injector operations diagram, you'll notice it states "Also the feed for 2 injectors comes from the same driver set" So power for the high side powers up 2 injectors, and most GDI injectors are Peak and Hold type, meaning they open the injector with a high voltage, and then pulse them with a lower voltage to keep them open. But you should be able to see the Fuel Rail data PID drop off quickly if one is staying open, check that first. Since you can't tap into these fuel rails due to the very high pressure, watching the data PID should help you figure out what's going on, a ton of white smoke sounds like one is staying open. The resistance spec for each injector is 1.5 Ohms. I'm looking for a fuel pressure spec, but it will be high, usually 500 to 2000psi for a GDI rail.
Are there any other specs you want me to look for?
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Wednesday, May 15th, 2024 AT 11:34 AM
Tiny
AL514
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Are the MAP sensor codes coming back? Also look for the Long-Term and Short-Term Fuel Trims, (LTFT and STFT) see what those numbers are, they will be negative if there is an injector staying open. I would expect some sort of fuel trim code to set as well, did the white smoke start after replacing the one injector?
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Wednesday, May 15th, 2024 AT 11:35 AM
Tiny
AL514
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Here is the Fuel Rail pressure sensor voltage over pressure graph, so 4.5volts is 2,900 PSI. Very high pressure.
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Wednesday, May 15th, 2024 AT 11:42 AM
Tiny
ANN SENN
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It is definitely leaking or stuck open in under 1min gas went from 140 miles till empty to 127 plus strong shell of gas and thick smoke.
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Thursday, May 16th, 2024 AT 6:12 AM
Tiny
ANN SENN
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Ordered new injectors should be in today. The pics are with the car running. The spark adv. Jumped up to 25 could that be from injectors because those and coils were replaced.
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Thursday, May 16th, 2024 AT 6:15 AM
Tiny
ANN SENN
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I made a collage because it would only let me upload one picture at a time and then I'd have to send them one by one.
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Thursday, May 16th, 2024 AT 6:16 AM
Tiny
ANN SENN
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Had no reading for short and long fuel trim?
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Thursday, May 16th, 2024 AT 6:17 AM
Tiny
ANN SENN
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Codes were 0302, 0300, 0108
Mf in 2, random mf, and map sensor one- which I'll address today while waiting for injectors.
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Thursday, May 16th, 2024 AT 6:27 AM
Tiny
AL514
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There's no fuel trim data because the vehicle has a fuel system fault, see where it says OL-Fault, that's the fuel system staying in Open Loop operations due to the faults. This is a very basic scan tool and is only giving you global OBD2 data, it's not going to be much help. Your front Air/Fuel ratio sensor reading is extremely rich at -2.938ma. That should be close to 0 and the EQ_RATII should be close to 1. Being in OL (open loop) operation the PCM is only taking input data from a couple sensors, you need to know what the Fuel Rail pressure is. And you need to check the MAP sensor to determine what that fault is.
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Thursday, May 16th, 2024 AT 9:32 AM

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