99 sportage Engine idles rough, no power, P0343

dnb20653 · 03-22-2009, 09:19 PM

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!

Pacosworld · 03-22-2009, 11:08 PM

Quote:

Originally Posted by dnb20653

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.

dnb20653 · 03-22-2009, 11:24 PM

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?

ron1004 · 03-23-2009, 12:03 AM

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.

Pacosworld · 03-23-2009, 12:05 AM

Quote:

Originally Posted by dnb20653

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.

Quote:

Originally Posted by dnb20653

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.

dnb20653 · 03-23-2009, 10:05 AM

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.

ron1004 · 03-23-2009, 10:53 AM

Quote:

Originally Posted by dnb20653

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.

dnb20653 · 03-23-2009, 06:08 PM

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.

dnb20653 · 03-24-2009, 05:00 PM

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?

dnb20653 · 03-25-2009, 06:11 PM

How would i know if the ecm is the problem?