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P0340 — Camshaft Position Sensor Circuit — Bank 1

High Severity  ·  Engine

OBD-II code P0340 means your vehicle's ECU detected: Camshaft Position Sensor Circuit — Bank 1. Below: causes, step-by-step fixes, and repair cost — free, no signup needed.

High severity — do not ignore. Get a diagnosis promptly to avoid further engine damage.
Typical Repair Cost
$100–$400
Parts + labor, national average
Severity
High
Address as soon as possible
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Common Causes of P0340

  • Failed cam sensor
  • Wiring damage
  • Tone wheel damage
  • Timing belt/chain issue
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How to Fix Code P0340

1
Replace camshaft position sensor ($30–$200 parts+labor)
2
Inspect sensor wiring
3
Check timing if symptoms persist

FAQ — Code P0340

What does OBD-II code P0340 mean?
P0340 means your vehicle's onboard computer detected: Camshaft Position Sensor Circuit — Bank 1. This is a high-severity code in the Engine category.
How much does it cost to fix code P0340?
Typical repair cost for P0340 is $100–$400 including parts and labor. Costs vary by vehicle make, model, and location. A free scan at AutoZone or O'Reilly is a good first step.
Can I drive my car with code P0340?
Code P0340 is high severity. Avoid long drives until diagnosed — continued driving can cause additional engine damage.
What are the most common causes of P0340?
The most common causes are: Failed cam sensor, Wiring damage, Tone wheel damage, Timing belt/chain issue. Always start with the cheapest diagnosis step before replacing parts.
Will code P0340 clear itself?
Code P0340 will clear itself after the underlying issue is fixed and the ECU completes several successful drive cycles. Clearing it without fixing the root cause only masks the problem temporarily.

Is P0340 showing on your car?

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OBD-II code data is based on SAE J2012 standards and general repair industry data. Repair costs are national averages and vary by vehicle, location, and shop. Always consult a qualified mechanic for a diagnosis specific to your vehicle.