P0340

Q: What does OBD2 code P0340 mean?

P0340 means: Camshaft Position Sensor A Circuit Malfunction Bank 1. The camshaft position sensor (CMP) on Bank 1 has a circuit fault. This sensor is critical for engine timing.

Camshaft Position Sensor A Circuit Malfunction Bank 1

The camshaft position sensor (CMP) on Bank 1 has a circuit fault. This sensor is critical for engine timing.

SeverityCritical

CategoryIgnition

Est. Repair Cost$100–$400

Code TypePowertrain

DIY RepairYes

⚡ Common Causes

›Faulty camshaft position sensor
›Damaged wiring or connector
›Reluctor wheel damage
›Timing chain jumped a tooth

⚠️ Symptoms

›Engine cranks but will not start
›Rough running
›Stalling
›Check engine light
›Hard start

✅ How to Fix — Step by Step

Step 1:Check sensor wiring and connector
Step 2:Test sensor with multimeter
Step 3:Replace camshaft position sensor
Step 4:Check reluctor wheel for damage
Step 5:Check timing chain

💡 Pro Tip: P0340 can prevent the engine from starting entirely — check sensor connector first before expensive tests.

Repair Cost Estimate

Full Repair Estimate

$100–$400

DIY Possible?

YES

Severity

Critical

Frequently Asked Questions

What does OBD2 code P0340 mean?+

P0340 stands for Camshaft Position Sensor A Circuit Malfunction Bank 1. The camshaft position sensor (CMP) on Bank 1 has a circuit fault. This sensor is critical for engine timing.

What causes code P0340?+

Faulty camshaft position sensor; Damaged wiring or connector; Reluctor wheel damage; Timing chain jumped a tooth

How do I fix code P0340?+

Check sensor wiring and connector; Test sensor with multimeter; Replace camshaft position sensor; Check reluctor wheel for damage; Check timing chain

How much does it cost to fix P0340?+

Estimated repair cost for P0340 is $100–$400.

Is P0340 DIY-friendly?+

Yes — P0340 is generally DIY-friendly with basic tools.