99 sportage Engine idles rough, no power, P0343 - Kia Forum
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post #1 of 29 (permalink) Old 03-22-2009, 09:19 PM Thread Starter
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Default 99 sportage Engine idles rough, no power, P0343

Need help.

My 99 sportage bogs down when you apply gas. Idles rough at about 500 rpm. no power at all. The only code I get is P0343, Camshaft position sensor. I checked continuity to the ecu (pin 44) good. ground is good. 12v power to sensor is good. Checked the timing belt. Changed 3 mos ago. timing marks are dead on! So I changed the camshaft position sensor. no change. Cleared the codes and got the P0343 back within a few minutes, the pre cat has been busted out. Could the secondary cat be clogged and is there anyway it would cause a P0343? Damn I hope someone can help!
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post #2 of 29 (permalink) Old 03-22-2009, 11:08 PM
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Need help.

My 99 sportage bogs down when you apply gas. Idles rough at about 500 rpm. no power at all. The only code I get is P0343, Camshaft position sensor. I checked continuity to the ecu (pin 44) good. ground is good. 12v power to sensor is good. Checked the timing belt. Changed 3 mos ago. timing marks are dead on! So I changed the camshaft position sensor. no change. Cleared the codes and got the P0343 back within a few minutes, the pre cat has been busted out. Could the secondary cat be clogged and is there anyway it would cause a P0343? Damn I hope someone can help!
Code P0343 Camshaft position (phase) sensor high input
Threshold Value ~ No signal from camshaft position sensor for >200 crankshaft revolutions
Enable Conditions ~ Engine speed: >600 RPM
Time Requirements ~ Continuous
MIL Illumination ~ 2 driving cycle

Related Items
• Open or short to B+ between Cam Position (Phase) Sensor (CMP)(C118-2) and ECM (C211-44).
• Open between CMP Sensor (C118-3) and GND.
• Open between EGI Main Relay (pin #1) and CMP Sensor (C118-1).
• Missing sensor pin on exhaust cam.
• Faulty CMP Sensor

Have you checked the exhaust cam for a missing sensor pin? There should be a steel dowel pin in the end of the exhaust camshaft.

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post #3 of 29 (permalink) Old 03-22-2009, 11:24 PM Thread Starter
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Yes, I felt the metal rod in the end of the camshaft, before replacing the cam position sensor. A mechanic told me to replace the crankshaft positon sensor, stated that he had the same problem before with a P0343 code and that fixed it. Have you ever heard of this?
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post #4 of 29 (permalink) Old 03-23-2009, 12:03 AM
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It's advised to check for the steel dowel that's used by the CPS, but I've never heard of it being a problem on a running vehicle that starts misbehaving.

You appear to be suitably knowledgeable and have covered everything I could think of, but if it was me, I'd be taking another look at the valve timing.

Have you taken a look at the KiaTech's web site for info - see my sig for the link.

If you needed to clear out the pre-CAT, then it may well be that the second one is clogged, but not sure that this would trigger the code you have, but could sure make it bog down.

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post #5 of 29 (permalink) Old 03-23-2009, 12:05 AM
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Yes, I felt the metal rod in the end of the camshaft, before replacing the cam position sensor. A mechanic told me to replace the crankshaft positon sensor, stated that he had the same problem before with a P0343 code and that fixed it. Have you ever heard of this?
No I haven't heard of that, but I don't work on the older Sportages that much. I would probably take the valve cover off and physically view the dowel on the exhaust cam.

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I checked continuity to the ecu (pin 44) good. ground is good. 12v power to sensor is good.
Per Kiatechinfo.com: Turn ignition on (engine off) and measure voltage at BOB pin 44 (0v).
Is measured voltage 0v?

Appears that you have a short between ECU pin 44 and and cam position sensor pin 2.

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post #6 of 29 (permalink) Old 03-23-2009, 10:05 AM Thread Starter
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The continuity i measured was between pin 2 and pin 44 of the ecu. It should be less than 1 ohm, It was .3, so that is good. I checked voltage KOEO at pin 44 of the ecu and it was 0v. just as Kiatech states it should be. so I do not have a short to power. Advance auto where i bought the new camshaft position sensor thinks I may have gotten a bad part and told me to check the ohms. If i am correct this is a hall effect sensor and can not be tested by merely checking resistance. Is this correct? The sensor appears to be an open circuit, until operating.
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post #7 of 29 (permalink) Old 03-23-2009, 10:53 AM
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The continuity i measured was between pin 2 and pin 44 of the ecu. It should be less than 1 ohm, It was .3, so that is good. I checked voltage KOEO at pin 44 of the ecu and it was 0v. just as Kiatech states it should be. so I do not have a short to power. Advance auto where i bought the new camshaft position sensor thinks I may have gotten a bad part and told me to check the ohms. If i am correct this is a hall effect sensor and can not be tested by merely checking resistance. Is this correct? The sensor appears to be an open circuit, until operating.
You're correct, it is a hall effect sensor and requires a little more than a DC resistance check with a multimeter.

KiaTechInfo don't show the resistance check procedure.

Quality and not quantity counts.

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post #8 of 29 (permalink) Old 03-23-2009, 06:08 PM Thread Starter
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i just tore it down again and rechecked the timing marks, and inspected the crank sprocket and key, everthing is good. timing marks are perfect. At a complete loss on this one. Still getting P0343 code indicating the ecm is not receiving a signal from the cam position sensor. new cam position installed, no difference at all.
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post #9 of 29 (permalink) Old 03-24-2009, 05:00 PM Thread Starter
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i did note that when i replaced the cam position sensor that it was oily. I must have a leaky valve cover gasket. Will that cause the sensor to not work? Is it normal for the sensor to be in contact with oil?
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post #10 of 29 (permalink) Old 03-25-2009, 06:11 PM Thread Starter
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How would i know if the ecm is the problem?
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