Honda Element. Manual - part 82

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

The BARO sensor output voltage value is 4.49 V or more for at least 2 seconds. 

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 P2238 (48): ADVANCED DIAGNOSTICS 

DTC P2238: AIR/FUEL RATIO (A/F) SENSOR (SENSOR 1) AFS+ CIRCUIT LOW VOLTAGE 

OBD Status

N/A

Condition

 

Ignition switch

ON

No active DTCs

P1109, P2228

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

Fig. 237: Air/Fuel Ratio (A/F) Sensor 1 Circuit Diagram 

General Description 

The air/fuel ratio (A/F) sensor (sensor 1) is installed in the exhaust system and detects oxygen content in the 
exhaust gas. The A/F sensor transmits a signal to the engine control module (ECM)/powertrain control module 
(PCM). A heater for the sensor element is embedded in the A/F sensor (sensor 1). It heats the sensor to stabilize 
and speed up the detection of oxygen content. The increase in current through the heater levels off as the 
voltage applied to the electrode reaches a certain range because the amount of oxygen that goes through the 
diffusion layer is limited. The current is proportional to oxygen content in the exhaust gas, so the air/fuel ratio is 
detected by the measurement of the current. The ECM/PCM compares a set target air/fuel ratio with the 
detected air/fuel ratio and controls the fuel injection duration. 

If the A/F sensor (sensor 1) voltage is low, the air/fuel ratio is lean, and the ECM/PCM uses A/F feedback 
control to issue a Rich command. If the A/F sensor (sensor 1) voltage is high, the air/fuel ratio is rich, and the 
ECM/PCM uses A/F feedback control to issue a Lean command. 

If the element is not activated or the ECM/PCM terminal voltage is a set value or less for a set time when power 
is applied to the A/F sensor (sensor 1) heater, a malfunction is detected and a DTC is stored. 

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

MONITOR DESCRIPTION 

Execution

Continuous

Sequence

None

Duration

5 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

  

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

The AFS+ terminal voltage is 0.4 V or less for at least 5 seconds. 

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 for 2 minutes. 

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 P2252 (48): ADVANCED DIAGNOSTICS 

DTC P2252: AIR/FUEL RATIO (A/F) SENSOR (SENSOR 1) AFS-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, P0135, P1157, P2195, P2252

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

Fig. 238: Air/Fuel Ratio (A/F) Sensor 1 Circuit Diagram 

General Description 

The air/fuel ratio (A/F) sensor (sensor 1) is installed in the exhaust system and detects oxygen content in the 
exhaust gas. The A/F sensor transmits a signal to the engine control module (ECM)/powertrain control module 
(PCM). A heater for the sensor element is embedded in the A/F sensor (sensor 1). It heats the sensor to stabilize 
and speed up the detection of oxygen content. The increase in current through the heater levels off as the 
voltage applied to the electrode reaches a certain range because the amount of oxygen that goes through the 
diffusion layer is limited. The current is proportional to oxygen content in the exhaust gas, so the air/fuel ratio is 
detected by the measurement of the current. The ECM/PCM compares a set target air/fuel ratio with the 
detected air/fuel ratio and controls the fuel injection duration. 

If the A/F sensor (sensor 1) voltage is low, the air/fuel ratio is lean, and the ECM/PCM uses A/F feedback 
control to issue a Rich command. If the A/F sensor (sensor 1) voltage is high, the air/fuel ratio is rich, and the 
ECM/PCM uses A/F feedback control to issue a Lean command. 

If the element is not activated or the ECM/PCM terminal voltage is a set value or less for a set time when power 
is applied to the A/F sensor (sensor 1) heater, a malfunction is detected and a DTC is stored. 

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

MONITOR DESCRIPTION 

Execution

Continuous

Sequence

None

Duration

5 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