| DTC Code | DTC Name |
|---|---|
| P0340 | Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor) |
DESCRIPTION
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 3 teeth on the camshaft passes 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 |
|---|---|---|
| P0340 | Deviation in camshaft position sensor signal and crankshaft position sensor signal (3 trip detection logic) |
|
DTC P0340 is detected when the engine cranks 12 revolutions or more.
CAUTION / NOTICE / HINT
Perform electronic throttle learning after replacing the ECM (Click here).
Read freeze frame data using the intelligent tester. 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, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
Troubleshoot DTCs P0341, P0342 and P0343 first. If no trouble is found, troubleshoot the following mechanical systems.
PROCEDURE
CHECK VALVE TIMING
Check for looseness or a jumped tooth in the timing chain (Click here).
| OK |
|---|
| The matchmarks of the crankshaft pulley and camshaft pulley align. |
REPLACE ECM (Click here)
ADJUST VALVE TIMING (Click here)