DTC Advanced Diagnostics: P0068 (K20C1) - Honda Civic FC/FK 2016-2021

DTC Advanced Diagnostics: P0068

DTC P0068:Throttle Position Correlation

General Description

The powertrain control module (PCM) monitors the input variables for charge detection. The function based on an evaluation of the difference between the measured mass air flow by mass airflow (MAF) sensor and the calculated mass airflow based on the throttle valve system. If the factor of mass airflow by the throttle valve and by the MAF sensor is greater than a specified value, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	0.5 second or more
DTC Type	Two drive cycles, MIL on

Enable Conditions

Condition	Minimum	Maximum
Multiplicative correction of mixture adaptation*	-0.12	–
Multiplicative correction of mixture adaptation**	–	0.12
State of the engine	Running

*: Maximum error
**: Minimum error

Malfunction Threshold

Either of the conditions occurs.

	The factor of mass airflow by the throttle valve and by the MAF sensor is greater than 1.30.
	The factor of mass airflow by the throttle valve and by the MAF sensor is less than 0.70.

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

	Throttle body (throttle valve) polluted
	Air cleaner element polluted
	PCM internal failure (BARO sensor)

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.