Honda Element. Manual — part 10

fan comes on.

2. Drive the vehicle at a steady speed up to 25 mph (40 km/h), for at least 5 minutes.

3. Then, drive immediately at a steady speed between 26 - 81 mph (41 - 130 km/h) for at least 8 seconds.



If the EVAP monitor runs instead of the HO2S monitor, turn the engine off, then restart it, and the
HO2S monitor will restart.



Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for illuminating the MIL

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM/PCM
memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the
freeze frame data are stored.

Conditions for clearing the MIL

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic
runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear
command or by disconnecting the battery.

DTC P0134 (41): ADVANCED DIAGNOSTICS

DTC P0134: AIR/FUEL RATIO (A/F) SENSOR (SENSOR 1) HEATER SYSTEM MALFUNCTION

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

Fig. 28: Air/Fuel Ratio (A/F) Sensor 1 Malfunction Determination

General Description

The air/fuel ratio (A/F) sensor is activated by warming the element with a heater to maintain it at a steady high
temperature for accurate air/fuel (A/F) ratio calculation. The A/F sensor does not become active when the
element is not properly heated due to a heater malfunction, and the exhaust emissions deteriorate. The engine
control module (ECM)/powertrain control module (PCM) monitors the A/F sensor condition by monitoring the
A/F sensor internal resistance.

1. When the A/F sensor does not activate in a set time after the A/F sensor heater is turned on (with high

A/F sensor internal resistance), a malfunction of the A/F sensor heater is detected, and a DTC is stored.

2. The A/F sensor heater cycles ON and OFF within a set time. The heater's state is detected by monitoring

the internal resistance of the A/F sensor. If the resistance remains high when the heater is ON, a
malfunction in the A/F sensor heater is detected, and a DTC is stored.

Because the degree of effect on engine control differs according to the A/F sensor internal resistance,
there are two malfunction detection threshold levels. When either one is reached, a malfunction is
detected.

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

Monitor Execution, Sequence, Duration, DTC Type, OBD Status

MONITOR DESCRIPTION

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

Malfunction determination 1

The A/F sensor internal resistance value is 50 ohms or more for at least 40 seconds right after the engine starts.

Malfunction determination 2



The A/F sensor internal resistance value is 50 ohms or more for at least 15 seconds.



The A/F sensor internal resistance value is 80 ohms or more for at least 1 second.

Driving Pattern

Start the engine, then let it idle for at least 2 minutes.

Diagnosis Details

Conditions for illuminating the MIL

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM/PCM
memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the
freeze frame data are stored.

Conditions for clearing the MIL

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic
runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear

Execution

Continuous

Sequence

None

Duration

40 seconds or more

DTC Type

Two drive cycles, MIL ON

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Battery voltage

10.5 V

-

Fuel feedback

Other than during fuel cut-off operation

No active DTCs

P0135, P1157, P1172, P2195, P2238, P2252

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

command or by disconnecting the battery.

DTC P0135 (41): ADVANCED DIAGNOSTICS

DTC P0135: AIR/FUEL RATIO (A/F) SENSOR (SENSOR 1) HEATER CIRCUIT MALFUNCTION

Fig. 29: Air/Fuel Ratio (A/F) Sensor 1 Heater Circuit Diagram

General Description

A heater for the sensor element is embedded in the air/fuel ratio (A/F) sensor (sensor 1), and it is controlled by
the engine control module (ECM)/powertrain control module (PCM). It is activated and heats the sensor to
stabilize and speed up the detection of oxygen content when the exhaust gas temperature is cold.

If the A/F sensor (sensor 1) heater current is not a set value, or the heater is overheated, a malfunction is
detected and a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status

MONITOR DESCRIPTION

Enable Conditions

Execution

Continuous

Sequence

None

Duration

4 seconds or more

DTC Type

One drive cycle, MIL ON

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element