p0340
Moderate
Mercedes-Benz · SUVs
Camshaft Position Sensor A Circuit Bank 1
Quick Answer
Error code P0340 on your Mercedes-Benz SUVs means: Camshaft Position Sensor A Circuit Bank 1. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
X243X247X254V167X167AMG GLB35 4MATIC 2024AMG GLC43 4MATIC 2024AMG GLC63 S 2024AMG GLE53 4MATIC+ 2024AMG GLE63 S 2024AMG GLS63 2024EQB 250+ 2024EQB 300 4MATIC 2024EQB 350 4MATIC 2024GLB250 2024GLB250 4MATIC 2024GLC300 2024GLC300 4MATIC 2024GLE350 4MATIC 2024GLE450 4MATIC 2024GLS450 4MATIC 2024GLS580 4MATIC 2024Maybach GLS600 2024
Likely Causes
How to Fix It
1
Inspect the camshaft position sensor connector for corrosion and secure fit
2
Measure sensor resistance and compare to Mercedes specifications
3
Check wiring harness continuity between the sensor and ECM
4
Verify timing chain has not jumped by checking alignment marks
5
Replace the camshaft position sensor if readings are out of range
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 repair kit
Electrical contact cleaner
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