DTC P0068:00 [MZI-3.7]

id0102d2311400

DTC P0068:00 | MAP/MAF-throttle position correlation
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DETECTION CONDITION | • The PCM monitors a vehicle operation rationality check by comparing sensed throttle position to mass air flow readings. If during a KOER self-test, the comparison of the TP sensor and MAF sensor readings are not consistent with the calibrated load values, test fails and a DTC is stored in continuous memory.
POSSIBLE CAUSE | • Air leak between MAF sensor and throttle body • TP sensor or MAF sensor malfunction • TP sensor not seated correctly

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | VERIFY RELATED PENDING CODE OR STORED DTC • Verify the related PENDING CODE or stored DTCs. • Are other DTCs present? | Yes | Go to appropriate DTC inspection. (See DTC TABLE [MZI-3.7].)
No | Go to the next step.
4 | INSPECT FOR INLET AIR LEAKS • Listen for air noise around the MAF sensor and throttle body while the engine is running. • Is a concern present? | Yes | Repair as necessary, then go to Step 8.
No | Go to the next step.
5 | INSPECT FOR TP2 SIGNAL HIGH VERSUS LOAD WHILE DRIVING THE VEHICLE • Turn the ignition switch to the ON position (Engine running). • Access the TP2 and LOAD PIDs using the M-MDS. • Is the TP2 PID more than 2.44 V and the LOAD PID less than 30%? | Yes | Replace the malfunctioning part, then go to Step 8.
No | Go to the next step.
6 | INSPECT FOR TP2 SIGNAL LOW VERSUS LOAD WHILE DRIVING THE VEHICLE • Turn the ignition switch to the ON position (Engine running). • Access the PCM and monitor the TP2 and LOAD PIDs • Is the TP2 PID less than 0.24 V and the LOAD PID more than 55%? | Yes | Repair or replace the malfunctioning part, then go to Step 8.
No | Go to the next step.
7 | INSPECT FOR SELF-TEST DTCS • Turn the ignition switch to the ON position (Engine running). • Clear DTC from memory using M-MDS. • Drive the vehicle while exercising the throttle. • Retrieve the continuous memory DTCs. • Are any DTCs present? | Yes | Replace the malfunctioning part, then go to the next step.
No | Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”. Then go to the next step.
8 | VERIFY TROUBLESHOOTING OF DTC P0068:00 HAS BEEN COMPLETED • Verify that all disconnected connectors reconnected. • Clear DTC from memory using M-MDS. • Start engine. • Perform the KOEO or KOER self-test. (See KOEO/KOER SELF TEST [MZI-3.7].) • Is same DTC present? | Yes | Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZI-3.7].) Go to the next step.
No | Go to the next step.
9 | VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZI-3.7].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7].)
No | Troubleshooting completed.