2000 Elantra trouble code p0343 camshaft position sensor repair?

Tidied up the question a bit.
Question moved to sub category

Did the inability to start happen right after you put the new battery on? Did you reset the security system?

P0343 HYUNDAI Code Camshaft Position Sensor 'A' Circuit ...

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Repair Information for P0343 Hyundai code. Learn what Camshaft Position Sensor 'A' Circuit Range/Performance means, location and how to repair?

Dirty connections and grounds!

P0626 OBD-II Trouble Code: Generator Field/F Terminal ...

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P0626 means there's a fault on the generator field circuit due to a faulty alternator, battery, wiring, or poor communication between control module.

P0342 HYUNDAI Code Camshaft Position Sensor 'A' Circuit ...

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Repair Information for P0342 Hyundai code. Learn what Camshaft Position Sensor 'A' Circuit Low Input Bank 1 Or Single Sensor means, location and how to ...

Inspect the reluctor wheel for signs of damage or looseness. Refer to Diagnostic Aids. If you find damage or looseness to the reluctor wheel, refer to Camshaft Replacement - Left Side in Engine Mechanical.
Did you find and correct the condition?

Diagnostic Aids
• The following conditions may cause this DTC to set:
- Camshaft reluctor wheel damage
- Incorrect sensor installation
- The sensor coming in contact with the reluctor wheel
- Excessive air gap between the reluctor wheel and the sensor magnet
- A cracked or damaged sensor
- Foreign material passing between the sensor and the reluctor wheel
• This DTC will set with an intermittent failure on the ignition 1 voltage circuit, the CMP sensor signal circuit, or the low reference circuit. A hard failure of any one of these circuits should set DTC P0342 or P0343.
• The CMP sensor low reference circuit is shared with the mass air flow (MAF) sensor, and the engine coolant temperature (ECT) sensor.

The camshaft position (CMP) sensor is a hall effect switching device that works in conjunction with a single tooth reluctor wheel used to determine the position of the bank 2 exhaust camshaft. The engine control module (ECM) expects the CMP sensor signal to be low, 0 volts, as the single tooth in the reluctor wheel passes the sensor, and high, 12 volts, during the remainder of the reluctor wheel rotation. The ECM supplies a 12-volt pull up voltage on the CMP sensor signal circuit. The ECM expects to see one transition from high to low every two crankshaft revolutions. This signal, when combined with the crankshaft position (CKP) sensor signal, enables the ECM to properly synchronize ignition timing, fuel delivery and knock control. As long as the CKP signal is available, the engine can start and run. The ECM will default to a non-sequential fuel injector operation even if there is no CMP sensor signal. If the ECM detects extra or missing CMP sensor signal transitions within a certain number of crankshaft revolutions, DTC P0341 sets.
The CMP sensor has the following circuits:
• Ignition 1 voltage circuit
• Low Reference circuit
• CMP sensor signal circuit

- Camshaft Position Sensor harness is open or shorted
P0343 - Camshaft Position Sensor 'A' Circuit High Input
WHEN A CODE DISCIRIPTION HAS CIRCUIT IN IT , IT HAS A WIRING PROBLEM



Read more: http://www.engine-codes.com/P0343.html

Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine Stall
P0343 Chevrolet Description
The Camshaft Position (CMP) Sensor sensor works in conjunction with a 1X reluctor wheel on the camshaft. The Powertrain Control Module (PCM) provides a 12 volt power supply to the CMP sensor as well as a ground and a signal circuit.
The CMP sensor determines whether a cylinder is on a firing stroke or on an exhaust stroke. As the camshaft rotates, the reluctor wheel interrupts a magnetic field produced by a magnet within the sensor. The sensors internal circuitry detects this and produces a signal which the PCM reads. The PCM uses this 1X signal in combination with the Crankshaft Position sensor 24X signal in order to determine crankshaft position and stroke. This diagnostic for the Camshaft Position sensor tests for a loss of Camshaft Position sensor signal.
Observe that as long as the Crankshaft Position sensor 24X signal is available, the engine will start. The PCM can determine top dead center for all cylinders by using the Crankshaft Position sensor 24X signal alone. The Camshaft Position sensor 1X signal is used by the PCM to determine if the cylinder at top dead center is on the firing stroke, or the exhaust stroke. The system attempts synchronization and looks for an increase in engine speed indicating the engine started. If the PCM does not detect an increase in engine speed, the PCM incorrectly synchronized to the exhaust stroke and will re-sync to the opposite cam position. A slightly longer cranking time may be a symptom of this condition.

Read more: http://engine-codes.com/p0343_chevrolet.html#ixzz31FPYjyRM

P0343 - Camshaft Position Sensor 'A' Circuit High InputI'm surprised Autozone didn't give you a printout of the possible causes or tell you what they were. These are possible causes but it could also be the wiring in the system too.


- Faulty Camshaft Position Sensor
- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery

All ways, the camshaft position sensor signal sent to the ECM is intermittent

The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Powertrain Control Module (PCM) or Electronic Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.

When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.

When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.

Check thos DTC diagnostic and possible solutions about P0344 - Camshaft Position Sensor Circuit Intermittent

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine Stall

Possible causes
- Harness or connectors (The sensor circuit is open or shorted)
- Camshaft position sensor may be faulty
- Camshaft (Intake) may be damage
- Starter motor may be faulty
- Starting system circuit
- Dead (Weak) battery

Possible solution
- Charge battery
- Repair harness or connector
- Replaced Camshaft Position Sensor.
Tech notes
- Sometimes and in some models, low battery voltage or a weak starter can can trigger a Camshaft Position Sensor code.


Hope this helps.

P0300 is multiple engine misfire detected
P0303 is misfire in cylinder 3
P0305 is misfire in cylinder 5
P0343 is camshaft position sensor A (bank 1)
P0347 is camshaft position sensor A (bank 2)
P0368 is camshaft position sensor B (bank 1)
P0392 is camshaft position sensor B (bank2)
P0496 is EVAP Canister Purge System High Purge Flow

ITS ABOVE THE STARTER.YOU HAVE TO REMOVE STARTER TO GET TO CRANKSHAFT SENSOR.

try cleaning all engine gronds and grounds on battery tray there was an issue with wiring to the mass meter and tps

camshaft position sensor high input,check sensor,if out of spec,replace