|DTC Code||DTC Name|
|P0340||Camshaft Position Sensor Circuit|
|P0341||Camshaft Position Sensor "A" Circuit Range / Performance (Bank 1 or Single Sensor)|
The camshaft position sensor consists of a magnet and an iron core which is wrapped with copper wire, and is installed on the cylinder head. When the camshaft rotates, each of the 3 teeth on the camshaft pass through the camshaft position sensor. This activates the internal magnet in the sensor, generating a voltage in the copper wire. The camshaft rotation is synchronized with the crankshaft rotation. When the crankshaft turns twice, the voltage is generated 3 times in the camshaft position sensor. The generated voltage in the sensor acts as a signal, allowing the ECM to locate the camshaft position. This signal is then used to control ignition timing, fuel injection timing, and the VVT system.
|DTC No.||DTC Detection Condition||Trouble Area|
When one of the following conditions is met:
|P0341||When crankshaft rotates twice, The camshaft position sensor signal input to the ECM 12 times or more (1 trip detection logic).||
Reference: Inspection using an oscilloscope.
G2 stands for the camshaft position sensor signal and NE stands for the crankshaft position sensor signal.
Grounding failure of the shielded wire may cause noise in the waveforms.
|Tester Connection||Tool Setting||Condition||Specified Condition|
|D97-93 (NE+) - D97-117 (NE-)||5 V/DIV, 20 msec./DIV.||Idling||The correct waveform is as shown|
|D97-94 (G2) - D97-118 (G2-)||5 V/DIV, 20 msec./DIV.||Idling||The correct waveform is as shown|
If no signal is transmitted by the camshaft position sensor despite the engine running, or the rotations of the camshaft and crankshaft are not synchronized, the ECM interprets this as a malfunction of the circuit.
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
INSPECT CAMSHAFT POSITION SENSOR (RESISTANCE)
Inspect the camshaft position sensor Click here.
REPLACE CAMSHAFT POSITION SENSOR Click here
CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)
Disconnect the camshaft position sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
REPAIR OR REPLACE HARNESS OR CONNECTOR
CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)
Check the camshaft position sensor.
|Sensor is installed correctly.|
SECURELY REINSTALL SENSOR Click here
INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (TEETH)
Check the teeth of the camshaft timing gear assembly.
|Teeth do not have any cracks or deformation.|
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Click here
REPLACE CAMSHAFT POSITION SENSOR
Replace the camshaft position sensor Click here.
CHECK WHETHER DTC OUTPUT RECURS
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the intelligent tester on.
Clear the DTCs Click here.
Turn the ignition switch off and wait for at least 30 seconds.
Start the engine and idle it for 10 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / DTC.
Read the DTCs.
|No DTC is output||A|
|P0340 is output||B|
If the engine does not start, replace the ECM.
REPLACE ECM Click here