DTC Advanced Diagnostics: P006A (3.0L Engine)

DTC P006A: Mass Airflow (MAF) Sensor Circuit Range/Performance Problem

General Description

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

The mass airflow (MAF) sensor directly measures the amount of intake airflow into the engine, and the powertrain control module (PCM) controls the fuel injection based on the measured value. The PCM calculates the estimated mass airflow amount based on the manifold absolute pressure (MAP) sensor value. The MAF sensor value is compared with the estimated mass airflow amount. If the difference between the measured MAF sensor value and the estimated mass airflow value is large, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	10 seconds or more
DTC Type	Two drive cycles, MIL on

Enable Conditions

Condition	Minimum	Maximum
Elapsed time after the vehicle is turned to the ON mode	2 seconds	-

[ ]: HDS Parameter

Condition	Minimum	Maximum
Engine coolant temperature [ECT Sensor 1]	140 deg.F (60 deg.C)	-
MAP sensor change per 100 milliseconds	10 kPa (75 mmHg, 3.0 inHg)	-

[ ]: HDS Parameter

Malfunction Threshold

Measured MAF sensor value - (minus) estimated mass airflow value is less than -40 % or more than +40 % for at least 10 seconds.

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.

MAF sensor failure
MAP sensor failure
Air leak

Confirmation Procedure

Operating Condition

Courtesy of HONDA, U.S.A., INC.

Start the engine. Hold the engine speed [Engine Speed] at 3, 000 rpm without load (in P or N) until the radiator fan comes on.
Let the engine idle for at least 20 seconds.
Drive the vehicle at a vehicle speed between 15 - 75 mph (24 - 120 km/h) for at least 20 seconds.

When freeze data is stored, drive the vehicle under those conditions instead of Driving Pattern step 3.
When you have difficulty duplicating the DTC because of road conditions and traffic situations, repeat the driving pattern several times.
Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

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, the freeze data, and the on-board snapshot 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, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.