MAP/MAF – Throttle Position Correlation
Table of contents
P0068 PONTIAC Possible Causes
- Air leak between the MAF sensor and throttle body
- Dirty Throttle body or Mass Air Flow (MAF) sensor
- Throttle Position (TP) sensor not seated properly
- Faulty Throttle Position (TP) sensor
- Faulty Mass Air Flow (MAF) sensor
How do I fix code P0068 PONTIAC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0068 PONTIAC code
The cost of diagnosing the P0068 PONTIAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
If the PCM detects that the difference between the actual air flow (MAF) and the speed density calculated air flow is greater than expected, DTC P0068 sets.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of power
- Engine rough idle
P0068 PONTIAC Description
The Powertrain Control Module (PCM) uses the Throttle Position (TP), Barometric Pressure (BARO), Intake Air Temperature (IAT), and engine RPM in order to calculate the predicted mass airflow rate. The PCM compares the predicted Mass Air Flow (MAF) value to the actual mass airflow value and the speed density calculation in order to verify the proper throttle operation.