Honda Element. Manual — part 11

ENABLE CONDITIONS

Malfunction Threshold

One of these conditions must be met.



The heater current is 0.8 A or more for at least 4 seconds while the heater is activated, and the heater
current is 0.8 A or less for at least 4 seconds while the heater is not activated.



. The heater current is 15.2 A or more for at least 0.6 second.

Driving Pattern

Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan
comes on, then let it idle.

Diagnosis Details

Conditions for illuminating the MIL

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the
ECM/PCM memory.

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

DTC P0137 (63): ADVANCED DIAGNOSTICS

DTC P0137: SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S (SENSOR 2))
CIRCUIT LOW VOLTAGE

Condition

Minimum

Maximum

Engine coolant temperature

68 °F (20 °C)

-

Battery voltage

10.5 V

-

State of the engine

Running

No active DTCs

P0117, P0118, P0134, P1157, P2195, P2238, P2252

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

Fig. 30: Secondary Heated Oxygen Sensor 2 Heater Circuit Diagram

Fig. 31: Secondary Heated Oxygen Sensor Output Voltage - Graph

General Description

The secondary heated oxygen sensor (HO2S) (sensor 2) detects the oxygen content in the exhaust gas
downstream of the three way catalytic converter (TWC) during stoichiometric air/fuel ratio feedback control
based on the air/fuel ratio (A/F) sensor (sensor 1) output voltage. The secondary HO2S controls the air/fuel ratio
from the A/F sensor output voltage so that the

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

TWC efficiency is optimized.

After current is applied to the secondary HO2S heater, if the secondary HO2S output continues low (lean)
during feedback control, a malfunction is detected and a DTC is stored.

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

MONITOR DESCRIPTION

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The secondary HO2S output voltage is 0.05 V or less for at least 30 seconds.

Driving Pattern

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator

fan comes on.

2. Then, drive immediately at a steady engine speed between 1,500 - 3,000 rpm for at least 1 minute.



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

Execution

Continuous

Sequence

None

Duration

30 seconds or more

DTC Type

Two drive cycles, MIL ON

OBD Status

PASSED/FAILED/EXECUTING/OUT OF (TEST) CONDITION

Condition

Minimum

Maximum

Elapsed time that
secondary HO2S activity
is not monitored after
starting the engine

15 seconds

-

Engine coolant
temperature

156 °F (69 °C)

-

Intake air temperature

-13 °F (-25 °C)

-

Fuel trim

0.69

1.47

Fuel feedback

Closed loop

No active DTCs

P0010, P0011, P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117,
P0118, P0133, P0134, P0135, P0141, P0171, P0172, P0300, P0301, P0302,
P0303, P0304, P0340, P0341, P0344, P0443, P0496, P0497, P1009, P1128,
P1129, P1157, P1172, P145C, P2195, P2238, P2252, P2646, P2647, P2648,
P2649, P2A00

Other

Other than at idle

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

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 P0138 (63): ADVANCED DIAGNOSTICS

DTC P0138: SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S (SENSOR 2))
CIRCUIT HIGH VOLTAGE

Fig. 32: Secondary Heated Oxygen Sensor 2 Heater Circuit Diagram

2007 Honda Element EX

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element