All codes › P0340
P0340: Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)
What it means
The bank 1 (or only) camshaft position sensor circuit has a fault.
Severity: High May cause long cranking or no-start.
Common causes
- Failed cam sensor
- Wiring damage
- Connector corrosion
- Timing belt/chain issue
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Often DIY. Cam sensors are usually on top or front of the head, one bolt.
Repair cost
SEEDED ESTIMATE Roughly $60–$390
Most likely repair: crank/cam position sensor. Diagnosis fees, taxes and other causes are not included.
| Line | Low | High | Basis |
|---|---|---|---|
| Crank/cam position sensor | $26 | $227 | Typical listed retail range, source ($445 and $859 outliers excluded) |
| Labor 0.3–1 hr | $30 | $160 | $100–$160/hr, shop survey |
⚠️ This is an editorial placeholder range for this type of repair. It is not based on real invoices or licensed pricing data yet. Real ranges will appear here once enough reader invoices for P0340 are verified.
Verified reader invoices for P0340: 0. Share your repair bill to help build real costs.
Tools that can read P0340
- ScanFixAI: Pro $29.99/mo or $249.99/yr
- OBDAI: Annual PRO bundle $299
- BlueDriver Pro Next-Gen: $119.95 list ($99.95 sale seen)
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