P0343 code no spark at plug /motor stalled

Tiny
01SATURN
  • MEMBER
  • 2001 SATURN L300
  • 3.0L
  • V6
  • FWD
  • AUTOMATIC
  • 182,000 MILES
I have replaced the timing belt it's in time new cam and crank sensors new ECM new starter new tcm I can't get spark at the plugs replace both coil packs nothing still have a 343 code and no spark any help would be great
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Thursday, November 19th, 2015 AT 7:08 AM

2 Replies

Tiny
ASEMASTER6371
  • EXPERT
I attached a description of the code. You will need a scan tool to verify. It sounds like you have a wiring harness issue.

Roy

The Camshaft Position (CMP) sensor produces an AC voltage of different amplitude and frequency depending on the velocity of the camshaft in order for the ECM to determine the camshaft position. The CMP sensor detects a single tooth on the reluctor wheel. The ECM expects the signal wire to be near 5 volts when the reluctor wheel tooth passes the sensor and near 0 volts during the remainder of the reluctor wheel revolution. The ECM constantly monitors the CMP signal and expects to see a switch from low to high once every two crankshaft revolutions. The Camshaft Position (CMP) sensor is used to determine which of the two cylinders is on the firing stroke. With the CKP sensor and CMP sensor inputs the ECM can properly synchronize the ignition timing, fuel delivery and engine knock control. DTC P0343 will set if the ECM detects the CMP sensor signal voltage remains high for a calibrated number of camshaft revolutions.

DTC PARAMETERS
DTC P0343 will set if the ECM detects the CMP sensor signal voltage remains high for a 8 camshaft revolutions when:
Engine is cranking for at least 3 seconds
OR

Engine is running
Condition exists 2 or more times
Condition exists 1 or more seconds
DTC P0343 diagnostic runs continuously once the above conditions have been met.

P0343 is a (type B) DTC

DIAGNOSTIC AIDS
To locate an intermittent problem use the Scan tool to monitor CMP RESYNC COUNTER with engine cranking/running. If the counter toggles between 85 and 170, the crankshaft pulses correctly are being received.

If the CMP RESYNC COUNTER reads 0 counts, there is a low voltage condition present. If the CMP RESYNC COUNTER reads 255 counts, there is a high voltage condition present.

DTC P0343 can set due to an intermittent open or short to voltage in the CMP circuits.

Make sure the crankshaft position sensor circuit wires are clear of voltage interfering wires. Electromagnetic Interference (EMI) waves can alter the amplitude and frequency of the CMP signal and create invalid CMP pulses.

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Sunday, November 22nd, 2015 AT 9:02 AM
Tiny
01SATURN
  • MEMBER
I did what you said. I now have spark at all 6 plugs but car still will not start. It is pushing flames fuel and smoke out the in take checked fuel pressure 46 psi rechecked the timing belt all marks line up pulled it to a shop gave 2 hours cost $183 car has ate my lunch and still will not run any help that makes my car run I will not forget who helped. I'm lost on this car
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Monday, November 23rd, 2015 AT 4:22 PM

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