Honda Element. Manual - part 14

 

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Honda Element. Manual - part 14

 

 

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 P0172 (45): ADVANCED DIAGNOSTICS 

DTC P0172: FUEL SYSTEM TOO RICH 

Fig. 38: Air/Fuel Ratio - Graph 

General Description 

The engine control module (ECM)/powertrain control module (PCM) detects the oxygen content in the exhaust 
gas from the air/fuel ratio (A/F) sensor (sensor 1) signal voltage, and it uses fuel feedback control to maintain 
the optimal air/fuel ratio. The air/fuel ratio coefficient for correcting the amount of injected fuel is the short term
fuel trim. The ECM/PCM varies short term fuel trim continuously to keep the air/fuel ratio close to the 
stoichiometric ratio for all driving conditions. Long term fuel trim is computed from short term fuel trim and is 
used to regulate long term deviation from the stoichiometric air/fuel ratio, which occurs when fuel metering 
components deteriorate with age or system failures occur. In addition, long term fuel trim is stored in the 
ECM/PCM memory and is used to determine when fuel metering components malfunction. When long term 
fuel trim is higher than normal, which is about 1.0 (0 %), the amount of injected fuel must be increased, and 
when lower than normal, it must be decreased. If long term fuel trim is lower than normal (too rich), a 
malfunction in the fuel metering components is detected and a DTC is stored. 

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

MONITOR DESCRIPTION 

Enable Conditions 

Execution

Once per driving cycle

(1)

Sequence

None

Duration

11.2 seconds

DTC Type

Two drive cycles, MIL ON

OBD Status

N/A

(1)

The malfunction judgment is cleared when it is judged as normal under the same driving conditions 
in which the malfunction is detected.

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

ENABLE CONDITIONS 

Malfunction Threshold 

Long term fuel trim is lower than 0.81 (-19 %). 

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 at a steady speed between 15 - 75 mph (24 - 120 km/h) for at least 15 minutes, and watch the 

long term fuel trim. If the long term fuel trim stays at about 1.0, the vehicle is OK or it is a very minor 
problem. If a significant fault is still present, the long term fuel trim will move up or down while driving. 

When freeze frame data is stored, drive the vehicle under those conditions instead of Driving 
Pattern 2.  

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

After clearing the DTC by disconnecting the battery or using the scan tool, extend Driving Pattern 
2 to 40 minutes or longer to allow time for long term fuel trim to recover.  

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 

Condition

Minimum

Maximum

Engine coolant 
temperature

156 °F (69 °C)

-

Intake air 
temperature

19 °F (-7 °C)

-

Engine 
speed

A/T

550 rpm

4,000 rpm

M/T

4,100 rpm

MAP value

20 kPa (6.0 in.Hg, 150 mmHg)

-

Fuel feedback Closed loop
Monitoring 
priority

P0420, P0456, P0457, P0497

No active 
DTCs

P0107, P0108, P0112, P0113, P0117, P0118, P0134, P0135, P0137, P0138, P0300, 
P0301, P0302, P0303, P0304, P0335, P0339, P0341, P0443, P0496, P0497, P1009, 
P1128, P1129, P1157, P1172, P145C, P2195, P2227, P2228, P2229, P2238, P2252, 
P2270, P2271, P2646, P2646, P2647, P2647, P2648, P2649

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

The MIL will be cleared if the malfunction does not recur during three consecutive drive cycles in which the 
engine conditions are similar to the first time the malfunction was detected. 

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 P0222 (7): ADVANCED DIAGNOSTICS 

DTC P0222: THROTTLE POSITION (TP) SENSOR B CIRCUIT LOW VOLTAGE 

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

Fig. 39: Throttle Position (TP) Sensor Circuit Diagram 

General Description 

Throttle position (TP) sensor B is a semiconductor type, and it is attached to the throttle body and shaft to 
determine throttle valve position. 

The throttle valve position signal from TP sensor B is transmitted to the throttle actuator control module for 
target position feedback control, then to the engine control module (ECM)/powertrain control module (PCM) as 

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

 

 

 

 

 

 

 

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