Skip the auto shop - Our mechanics make house calls

Q: Does camshaft position sensor affect in any way the fuel consumption?! 2003 Mercedes ML350

asked by on

replaced cam sensor and it seems that rpm are a bit higher than before at cruising speed.

My car has 95000 miles.
My car has an automatic transmission.

Hello - yes, a failed camshaft sensor can negatively affect fuel economy. With a failed cam sensor, engine management reverts to a "fail safe" engine timing scheme which is less efficient than when all sensors are working properly. The symptom you describe however - "RPMs seem higher at cruising speed" should NOT be related to the cam sensor. Perhaps you have accidentally invoked "Sport" mode, which may not include torque converter lockup, or select Overdrive? Doing so would have the effect you believe you are noticing.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  • Home
  • Questions
  • Does camshaft position sensor affect in any way the fuel consumption?! 2003 Mercedes ML350

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How do I use ECOn mode?

ECOn mode adjusts the engine and transmission performance, as well as the air conditioning and the cruise control, to help your vehicle achieve maximum fuel economy. To turn on ECOn mode, press the ECOn button, which is located on the...

Q: Possible timing chain replacement.

The code P0015 could be coming up for the following issues. ____________________________ The camshaft(s) have incorrect timing intake timing control valve control solenoid system has wiring problems Continuous oil flow to the VCT piston chamber The timing valve control...

Q: Violent jerking at stop lights

Hello There, It sounds like you may have a dirty or faulty idle air control valve. The idle air control valve is a small valve on the engine's intake system that reads the air intake as it comes into the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.