Trouble codes › P0068
P0068 MAP/MAF - Throttle Position Correlation
Fuel and air
P0068 means the airflow the engine measures doesn't match the throttle opening, usually a vacuum leak, a dirty MAF sensor or a dirty throttle body.
The engine computer compares the airflow it measures (MAF or MAP sensor) with the airflow it expects from the throttle position. P0068 means they don't agree, often because air is getting in around the throttle or a sensor is off.
The engine may idle high, hesitate or go into reduced power. Get it checked soon.
Common causes
- A vacuum leak after the throttle body
- A dirty or failing MAF sensor
- A dirty throttle body or a throttle position sensor problem
- A cracked intake boot or loose clamp
Symptoms
- High or unstable idle
- Hesitation or reduced power
- Stalling when coming to a stop
What to check first
- Check the intake boot and vacuum hoses for leaks; a smoke test finds hidden ones.
- Clean the MAF sensor and throttle body, then do the throttle relearn if your vehicle needs one.
- Compare MAF, MAP and throttle position readings at idle and part throttle with a scan tool.
- Check for service bulletins for your engine.
What does P0068 mean on your vehicle?
The likely cause depends on your engine. iRepair researches your exact year, make, model and engine (service bulletins, recalls and owner reports) and tells you what to check first. Your first 3 questions are free.
Ask iRepair about P0068No scanner? Most auto parts stores read check-engine codes for free.
Related codes
General guidance for P0068 on most vehicles. Some makers use the same code a little differently; confirm in the service information for your vehicle, put safety first, and see a professional when in doubt.