P0340 on MERCEDES-BENZ C-CLASS
What P0340 Means on Your MERCEDES-BENZ C-CLASS
Real MERCEDES-BENZ C-CLASS Owner Reports (Source: NHTSA Complaints Database)
"My check engine light came on while driving and i had it checked by a mechanic, the obc code was p0340 camshaft adjuster. my vehicle has less than 100,000 miles the camshaft adjuster should not need to be replace until around 250.000 miles."
"Check engine light code, p0340, camshaft position sensor. problem includes difficulty starting car, engine knock upon start, and misfires accelerating to pass at highway speeds."
"My car has 47k mileage and the check engine light was on a few weeks ago. the error code was p0340 camshaft position sensor circuit malfunction. the mercedes benz dealer technicians checked the check and found that the issue was caused by timing chain and they had to replace it."
Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.
Common Causes of P0340 on MERCEDES-BENZ C-CLASS
Percentages based on NHTSA complaint component analysis for this vehicle.
Complaint Trend by Year
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50-$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.