P0340 on Toyota Corolla E140: Camshaft Position Sensor Circuit Malfunction

Short answer: P0340 means “Camshaft Position Sensor Circuit Malfunction”. The car’s computer has found a fault in the Engine system and turns on the Check engine light (MIL). First check: read the code and freeze-frame data with an OBD-II scanner.

Standard OBD-II code Same meaning on all cars (SAE J2012). Not checked against this car’s factory manual.

Code

P0340

System

Engine

Dashboard light

Check engine light (MIL)

Applies to

Generic OBD-II meaning. Not every code is used by this car.

Confidence

medium (generic OBD-II definition, not checked against the factory manual for this car)

Source

obd-codes.com

Symptoms and when it is set

1. Check engine light on
2. Symptoms can include
3. Hard starting or no start
4. Rough running / misfiring
5. Loss of engine power

Likely causes

1. A wire or connector in the circuit could be grounded/shorted/broken
2. The camshaft position sensor may have failed
3. The PCM may have failed
4. There exists an open circuit
5. The crankshaft position sensor may have failed

What to check, in order

1. Read the code and freeze-frame data with an OBD-II scanner
2. Check the connector and wiring of the part named in the code
3. Test the part with scanner live data or a multimeter, using the values in the repair manual
4. Fix the cause, clear the code and test-drive

Related on this car

• 1.3 needs throttle to start when cold
• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

Same code on other cars

• P0340 · Toyota Passo (1st gen)
• P0340 · Toyota Vitz (1st gen)
• P0340 · Toyota Corolla (9th gen, E120)
• P0340 · Toyota Corolla (11th gen, E170)
• P0340 · Honda City (5th gen, GM2)
• P0340 · Honda Civic (10th gen, FC)
• P0340 · Suzuki Wagon R (Pakistan, K10B)
• P0340 on all cars compared

← P0336 P0341 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.