DTC P0068: Manifold Absolute Pressure (Map)/Mass Air Flow (MAF) - Throttle Position Correlation

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.

P0068 - MANIFOLD ABSOLUTE PRESSURE (MAP)/MASS AIR FLOW (MAF) - THROTTLE POSITION CORRELATION

For Vehicles With An Idle Air Control (IAC) Valve
Description:	The powertrain control module (PCM) monitors a vehicle operation rationality check by comparing sensed throttle position to mass airflow readings. If during a key ON, engine running (KOER) self-test, the comparison of the throttle position (TP) sensor and MAF sensor readings are not consistent with the calibrated load values, the test fails and a DTC is stored in continuous memory.
Possible Causes:	Air leak between MAF sensor and throttle body Damaged MAF sensor TP sensor not seated correctly Damaged TP sensor
Diagnostic Aids:	Diagnose any MAF or TP circuit DTCs first. Drive the vehicle and exercise the throttle and the TP sensor in all gears. A TP PID less than 4.82% (0.24 volt) with a LOAD PID greater than 55%, or a TP PID greater than 49.05% (2.44 volts) with a LOAD PID less than 30% indicates a concern is present.
For All Others
Description:	The powertrain control module (PCM) monitors a vehicle operation rationality check by comparing sensed throttle position to mass airflow readings. If during a key ON, engine running (KOER) self-test, the comparison of the throttle position (TP) sensor and MAF sensor readings are not consistent with the calibrated load values, the test fails and a DTC is stored in continuous memory.
Possible Causes:	Air leak between MAF sensor and throttle body. Damaged MAF sensor TP sensor not seated correctly Damaged TP sensor
Diagnostic Aids:	Diagnose any MAF or TP DTCs first. For Fiesta, if the throttle plate is closed and the LOAD PID is greater than 35%, or with the TP_REL PID at 28% with the LOAD PID less than 30% indicates a concern is present. For all others, if the throttle plate is closed and the LOAD PID is greater than 55%, or with the throttle plate at wide open throttle (WOT) with the LOAD PID less than 30% indicates a concern is present.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
Ranger	GO to PINPOINT TEST DH .
All others	GO to PINPOINT TEST DV .