DTC Code | DTC Name |
---|---|
P0340 | Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor) |
DESCRIPTION
The camshaft position sensor (G signal) consists of a magnet, iron core and pickup coil.
The G signal plate (No. 2 camshaft timing sprocket) has one tooth on its outer circumference and is installed on the camshaft timing chain gear. When the timing gear rotates, the protrusion on the signal plate and the air gap on the pickup coil change, causing fluctuations in the magnetic field that generate a voltage in the pickup coil.
The NE signal plate has 34 teeth and is mounted on the No. 1 crankshaft position sensor plate. The NE signal sensor generates 34 signals for every revolution. The ECM detects the camshaft angle based on the G signal, and detects the crankshaft angle based on the NE signal.
DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
---|---|---|
Crank engine for 4 seconds (STA on) | STA on: No camshaft position sensor signal is sent to the ECM while cranking for 4 seconds or more (2 trip detection logic) |
|
Idle engine for 1 second (STA off) | STA off: Either condition is met (1 trip detection logic):
|
Tech Tips
If DTC P0340 is stored, the following symptoms may appear:
Difficulty starting
Misfire
Combustion noise
Black smoke
White smoke
Lack of power
WIRING DIAGRAM
Refer to DTC P0335 Click here.
CAUTION / NOTICE / HINT
Note
After replacing the ECM, the new ECM needs registration (See page ) and initialization Click here.
After replacing the fuel supply pump assembly, the ECM needs initialization Click here.
After replacing an injector assembly, the ECM needs registration Click here.
Tech Tips
After performing the inspection procedure for the crankshaft position sensor, if DTC P0340 is output again, check the following items related to the camshaft position sensor.
Installation condition of the camshaft position sensor
Installation condition of the camshaft
Connection of the camshaft position sensor connector
Read freeze frame data using the GTS. Freeze frame data records the engine condition 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, and other data from the time the malfunction occurred.
PROCEDURE
INSPECT CAMSHAFT POSITION SENSOR
Inspect the camshaft position sensor Click here.
NG |
REPLACE CAMSHAFT POSITION SENSOR Click here |
OK |
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.
Standard Resistance | |||||||||||||||
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Standard Resistance | |||||||||||||||
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Reconnect the camshaft position sensor connector.
Reconnect the ECM connector.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR Click here |
OK |
CHECK CAMSHAFT POSITION SENSOR (SENSOR INSTALLATION)
Check the sensor installation.
OK |
---|
Sensor is installed correctly. |
NG |
SECURELY REINSTALL SENSOR Click here |
OK |
CHECK NO. 2 CAMSHAFT TIMING SPROCKET
Check the condition of the timing sprocket.
OK |
---|
Timing sprocket does not have any cracks or deformation. |
NG |
REPLACE NO. 2 CAMSHAFT TIMING SPROCKET Click here |
OK |
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR CIRCUIT)
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs Click here.
Turn the engine switch off and wait for 30 seconds or more.
Start the engine and idle it for 4 seconds or more.
Turn the GTS on.
Check the engine condition while wiggling the crankshaft position sensor wire harness for 4 seconds or more when idling.
Enter the following menus: Engine and ECT / Trouble Codes.
Read the DTCs.
Result | Proceed to |
---|---|
Except below | A |
There are problem such as rough idle or engine stall when wire harness is wiggled, or DTC is output* | B |
Tech Tips
*: As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector Click here.
B |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here |
A |
REPLACE ECM
Replace the ECM Click here.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here |
REPLACE CAMSHAFT POSITION SENSOR
Replace the camshaft position sensor Click here.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Repair or replace the harness or connector.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here |
SECURELY REINSTALL SENSOR
Securely reinstall the sensor Click here.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here |
REPLACE NO. 2 CAMSHAFT TIMING SPROCKET
Replace the No. 2 camshaft timing sprocket Click here.
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the GTS to the DLC3.
Clear the DTCs Click here.
Turn the engine switch off for 30 seconds or more.
Start the engine and idle it for 4 seconds or more.
Enter the following menus: Engine and ECT / Trouble Codes.
Confirm that the DTC is not output again.
NEXT |
END |