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p0340
Moderate
BMW · SUVs
Camshaft Position Sensor A Circuit Malfunction Bank 1
Quick Answer
Error code P0340 on your BMW SUVs means: Camshaft Position Sensor A Circuit Malfunction Bank 1. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
X1 M35i 2024X1 xDrive28i 2024X3 M 2024X3 M40i 2024X3 xDrive30i 2024X5 M 2024X5 M60i 2024X5 xDrive40i 2024X5 xDrive50e 2024X6 M 2024X6 M60i 2024X6 xDrive40i 2024X7 M60i 2024X7 xDrive40i 2024iX M60 2024iX xDrive50 2024X1X3 MX3X5 MX5X6X7iX
Likely Causes
  1. Failed camshaft position sensor
  2. Damaged or corroded sensor wiring
  3. Timing chain stretch affecting sensor signal
  4. VANOS solenoid failure disrupting cam position
  5. Loose or improperly installed sensor
How to Fix It
1
Inspect the camshaft position sensor connector and wiring for damage
2
Test sensor signal output with a scan tool or oscilloscope
3
Check timing chain alignment and tension
4
Replace the camshaft position sensor
5
Clear codes and verify proper engine timing with a test drive
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Camshaft position sensor
Sensor connector
Timing chain kit
Related Error Codes
P0171P0174P0300P0301P0335
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