StopOrDrive

Enter a 5-character code such as P0420, P0301, or P0457.

We don't have that code yet

Codes starting with P are engine and transmission, B are body, C are chassis, and U are network communication. A 0 as the second character means a generic code shared by all makes; a 1 means a manufacturer-specific code, so its meaning depends on your brand.

A steady check engine light usually means get it checked soon. A flashing check engine light means an active misfire: reduce speed and stop driving as soon as it is safe.

That doesn't look like an OBD-II code

A valid code is one letter (P, B, C, or U) followed by four characters, for example P0420.

P0340 Camshaft position sensor A circuit (Bank 1)

Can I drive with P0340?

Drive with caution

Stop if the engine stalls, hesitates or won't restart.

Can cause hard starting, stalling, or a no-start.

What does P0340 mean?

The engine computer is not getting a usable signal from the bank 1 camshaft position sensor.

What causes P0340?

  1. Failed camshaft position sensor
  2. Damaged wiring or connector
  3. Timing chain or belt problem
  4. Engine computer fault (rare)

How much does it cost to fix P0340?

$100 – $350

Sensor replacement: $100–$300.

Confirm the code yourself

A low-cost scanner lets you read the code, clear it, and see if it comes back before paying for a diagnosis.

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