DTC P0172: Rear Bank (Bank 1) Fuel System Too Rich - Honda Accord 2012-2017
DIY Honda Garage
[{'start': '1.120', 'end': '9.559', 'text': 'Welcome to the DIY Honda Garage channel.'}, {'start': '5.040', 'end': '12.080', 'text': 'In this presentation, we will cover DTC'}, {'start': '9.559', 'end': '14.799', 'text': 'P0172, which indicates that the rear'}, {'start': '12.080', 'end': '19.920', 'text': 'bank fuel system is too rich for the'}, {'start': '14.799', 'end': '22.400', 'text': 'Honda Accord models from 2012 to 2017.'}, {'start': '19.920', 'end': '24.800', 'text': 'This error code is significant as it'}, {'start': '22.400', 'end': '28.160', 'text': 'informs the mechanic that the powertrain'}, {'start': '24.800', 'end': '31.519', 'text': 'control module or PCM has detected an'}, {'start': '28.160', 'end': '34.800', 'text': 'abnormality in the air fuel ratio sensed'}, {'start': '31.519', 'end': '38.960', 'text': 'by the rear air fuel ratio sensor also'}, {'start': '34.800', 'end': '41.520', 'text': 'known as AF sensor bank one sensor one.'}, {'start': '38.960', 'end': '43.760', 'text': 'The fuel system being too rich means'}, {'start': '41.520', 'end': '46.160', 'text': 'that there is an excess of fuel in the'}, {'start': '43.760', 'end': '48.680', 'text': 'air fuel mixture which can lead to'}, {'start': '46.160', 'end': '51.920', 'text': 'engine malfunctions and increased'}, {'start': '48.680', 'end': '55.039', 'text': 'emissions. The role of the PCM is to'}, {'start': '51.920', 'end': '58.399', 'text': 'maintain an optimal air fuel ratio by'}, {'start': '55.039', 'end': '61.440', 'text': 'varying the short-term fuel trim. If the'}, {'start': '58.399', 'end': '63.680', 'text': 'PCM senses that the long-term fuel trim'}, {'start': '61.440', 'end': '67.360', 'text': 'deviates significantly from the normal'}, {'start': '63.680', 'end': '69.840', 'text': 'range, it stores this DTC to alert the'}, {'start': '67.360', 'end': '72.320', 'text': 'technician for further diagnosis and'}, {'start': '69.840', 'end': '74.479', 'text': 'repairs. It is crucial to tackle this'}, {'start': '72.320', 'end': '77.960', 'text': 'issue promptly to ensure vehicle'}, {'start': '74.479', 'end': '80.720', 'text': 'efficiency and compliance with emissions'}, {'start': '77.960', 'end': '82.759', 'text': 'regulations. The key component affected'}, {'start': '80.720', 'end': '86.159', 'text': 'by'}, {'start': '82.759', 'end': '89.520', 'text': 'DTCP0172 is the rear air fuel ratio'}, {'start': '86.159', 'end': '92.720', 'text': 'sensor. Specifically, the AF sensor'}, {'start': '89.520', 'end': '95.759', 'text': "located on bank one. This sensor's"}, {'start': '92.720', 'end': '98.880', 'text': 'primary role is to measure the oxygen'}, {'start': '95.759', 'end': '101.920', 'text': 'content in the exhaust gases, providing'}, {'start': '98.880', 'end': '104.880', 'text': 'feedback to the PCM. Based on this'}, {'start': '101.920', 'end': '108.079', 'text': 'feedback, the PCM can adjust the fuel'}, {'start': '104.880', 'end': '111.759', 'text': 'injection to maintain the ideal air fuel'}, {'start': '108.079', 'end': '114.640', 'text': 'mixture known as the stoometric ratio.'}, {'start': '111.759', 'end': '117.360', 'text': 'Short-term fuel trim allows the PCM to'}, {'start': '114.640', 'end': '119.920', 'text': 'make rapid adjustments in fuel delivery'}, {'start': '117.360', 'end': '122.479', 'text': 'based on current driving conditions,'}, {'start': '119.920', 'end': '125.119', 'text': 'while long-term fuel trim is used to'}, {'start': '122.479', 'end': '127.840', 'text': 'assess the average fuel delivery over'}, {'start': '125.119', 'end': '130.640', 'text': 'time to accommodate component wear or'}, {'start': '127.840', 'end': '133.440', 'text': 'system changes. If the long-term fuel'}, {'start': '130.640', 'end': '136.319', 'text': 'trim exceeds certain values, indicating'}, {'start': '133.440', 'end': '139.840', 'text': 'a too rich condition, the PCM will'}, {'start': '136.319', 'end': '142.239', 'text': 'trigger DTC P0172.'}, {'start': '139.840', 'end': '144.640', 'text': 'This condition can result from various'}, {'start': '142.239', 'end': '147.440', 'text': 'component failures or malfunctions in'}, {'start': '144.640', 'end': '150.440', 'text': 'the fuel delivery system. Several'}, {'start': '147.440', 'end': '155.040', 'text': 'potential causes can lead to the'}, {'start': '150.440', 'end': '157.760', 'text': 'P0172 DTC code. First, a failure of the'}, {'start': '155.040', 'end': '160.959', 'text': 'fuel pump might restrict fuel delivery'}, {'start': '157.760', 'end': '163.760', 'text': 'to the engine. Next, a malfunctioning'}, {'start': '160.959', 'end': '166.319', 'text': 'fuel injector can cause an imbalance in'}, {'start': '163.760', 'end': '169.280', 'text': 'the air fuel mixture, contributing to'}, {'start': '166.319', 'end': '171.879', 'text': 'excessive fuel delivery. Another common'}, {'start': '169.280', 'end': '175.040', 'text': 'issue is related to the fuel pressure'}, {'start': '171.879', 'end': '177.680', 'text': 'regulator. If it fails, it may not'}, {'start': '175.040', 'end': '181.200', 'text': 'properly regulate fuel pressure leading'}, {'start': '177.680', 'end': '184.879', 'text': 'to a rich mixture. Additionally, issues'}, {'start': '181.200', 'end': '187.200', 'text': 'with the mass air flow MAF sensor can'}, {'start': '184.879', 'end': '190.000', 'text': 'significantly impact air intake'}, {'start': '187.200', 'end': '193.280', 'text': 'measurements, which in turn affects fuel'}, {'start': '190.000', 'end': '195.599', 'text': 'mixture calculations. Furthermore, any'}, {'start': '193.280', 'end': '198.560', 'text': 'leaks in the intake manifold can'}, {'start': '195.599', 'end': '202.319', 'text': 'introduce unregulated air causing a'}, {'start': '198.560', 'end': '205.120', 'text': 'variance in the air fuel ratio. Lastly,'}, {'start': '202.319', 'end': '207.879', 'text': 'fuel supply system failures or valve'}, {'start': '205.120', 'end': '210.560', 'text': 'timing issues may contribute to this'}, {'start': '207.879', 'end': '213.360', 'text': 'DTC, indicating the importance of a'}, {'start': '210.560', 'end': '216.280', 'text': 'thorough diagnostic process. Recognizing'}, {'start': '213.360', 'end': '219.760', 'text': 'the symptoms related to'}, {'start': '216.280', 'end': '222.159', 'text': 'DTCP0172 is essential for prompt action.'}, {'start': '219.760', 'end': '224.239', 'text': 'One of the most noticeable signs is a'}, {'start': '222.159', 'end': '226.760', 'text': 'rough engine idle which can be'}, {'start': '224.239', 'end': '229.040', 'text': 'disruptive during normal driving.'}, {'start': '226.760', 'end': '231.760', 'text': 'Additionally, drivers may experience'}, {'start': '229.040', 'end': '234.319', 'text': 'poor fuel economy as the excess fuel'}, {'start': '231.760', 'end': '236.879', 'text': 'leads to inefficient combustion.'}, {'start': '234.319', 'end': '238.799', 'text': 'Increased emissions are another critical'}, {'start': '236.879', 'end': '240.799', 'text': 'indication that the engine is running'}, {'start': '238.799', 'end': '243.120', 'text': 'rich which can draw the eyeire of'}, {'start': '240.799', 'end': '245.920', 'text': 'environmental regulations and cause the'}, {'start': '243.120', 'end': '249.200', 'text': 'vehicle to fail emissions tests. The'}, {'start': '245.920', 'end': '251.599', 'text': 'malfunction indicator light or MIL will'}, {'start': '249.200', 'end': '254.040', 'text': 'also illuminate on the dashboard,'}, {'start': '251.599', 'end': '257.120', 'text': 'signaling the driver to seek immediate'}, {'start': '254.040', 'end': '259.680', 'text': 'attention. Finally, overall performance'}, {'start': '257.120', 'end': '262.000', 'text': 'loss may become evident as the engine'}, {'start': '259.680', 'end': '264.800', 'text': 'operates inefficiently. If these'}, {'start': '262.000', 'end': '267.240', 'text': 'symptoms arise, further diagnostic steps'}, {'start': '264.800', 'end': '270.080', 'text': 'to investigate'}, {'start': '267.240', 'end': '272.800', 'text': 'DTCP0172 should be undertaken as soon as'}, {'start': '270.080', 'end': '275.440', 'text': 'possible. The first troubleshooting step'}, {'start': '272.800', 'end': '277.479', 'text': 'involves a series of precise actions to'}, {'start': '275.440', 'end': '281.120', 'text': 'diagnose the'}, {'start': '277.479', 'end': '283.520', 'text': 'P0172 code. Start by initiating the'}, {'start': '281.120', 'end': '286.960', 'text': 'engine and carefully hold the engine'}, {'start': '283.520', 'end': '290.560', 'text': 'speed at about 3,000 RPM without'}, {'start': '286.960', 'end': '292.960', 'text': 'applying any load. It is crucial to do'}, {'start': '290.560', 'end': '295.280', 'text': 'this with the automatic transmission in'}, {'start': '292.960', 'end': '296.960', 'text': 'park or neutral for manual'}, {'start': '295.280', 'end': '300.360', 'text': 'transmissions.'}, {'start': '296.960', 'end': '303.120', 'text': 'Maintain this RPM until the radiator fan'}, {'start': '300.360', 'end': '306.080', 'text': 'activates, indicating that the engine is'}, {'start': '303.120', 'end': '308.960', 'text': 'sufficiently warmed up. Once the fan'}, {'start': '306.080', 'end': '312.240', 'text': 'comes on, allow the engine to idle and'}, {'start': '308.960', 'end': '315.919', 'text': 'monitor the long-term fuel trim. If the'}, {'start': '312.240', 'end': '318.160', 'text': 'long-term fuel trim remains around 1.0,'}, {'start': '315.919', 'end': '320.800', 'text': 'this suggests that there may not be a'}, {'start': '318.160', 'end': '324.000', 'text': 'significant issue or that it is a minor'}, {'start': '320.800', 'end': '326.560', 'text': 'problem. Conversely, if a fault is'}, {'start': '324.000', 'end': '328.400', 'text': 'indeed present, expect to see'}, {'start': '326.560', 'end': '331.199', 'text': 'significant fluctuations in the'}, {'start': '328.400', 'end': '333.600', 'text': 'long-term fuel trim value during this'}, {'start': '331.199', 'end': '335.680', 'text': 'observation period. For the second'}, {'start': '333.600', 'end': '338.240', 'text': 'troubleshooting step, you will need to'}, {'start': '335.680', 'end': '342.520', 'text': 'conduct a road test. Drive the vehicle'}, {'start': '338.240', 'end': '345.840', 'text': 'at a consistent speed between 15 and 75'}, {'start': '342.520', 'end': '348.560', 'text': 'mph, maintaining this for at least 15'}, {'start': '345.840', 'end': '351.520', 'text': 'minutes while closely monitoring the'}, {'start': '348.560', 'end': '354.400', 'text': 'long-term fuel trim parameter.'}, {'start': '351.520', 'end': '357.120', 'text': 'This observation is crucial because if'}, {'start': '354.400', 'end': '360.240', 'text': 'the long-term fuel trim remains at about'}, {'start': '357.120', 'end': '362.800', 'text': '1.0 during this testing, it indicates'}, {'start': '360.240', 'end': '365.840', 'text': 'that the problem is either resolved or'}, {'start': '362.800', 'end': '368.560', 'text': 'very minor. However, if you note that'}, {'start': '365.840', 'end': '371.199', 'text': 'the value varies significantly, it'}, {'start': '368.560', 'end': '373.960', 'text': 'suggests there is a likely fault. In'}, {'start': '371.199', 'end': '377.039', 'text': 'cases where freeze data is stored in the'}, {'start': '373.960', 'end': '379.440', 'text': 'PCM, it may be essential to replicate'}, {'start': '377.039', 'end': '381.400', 'text': 'the conditions that caused it to gather'}, {'start': '379.440', 'end': '384.800', 'text': 'relevant evidence for'}, {'start': '381.400', 'end': '387.039', 'text': 'diagnosis. After clearing the DTC by'}, {'start': '384.800', 'end': '390.000', 'text': 'disconnecting the battery or using the'}, {'start': '387.039', 'end': '394.560', 'text': 'scan tool, drive the vehicle at a steady'}, {'start': '390.000', 'end': '397.680', 'text': 'speed ranging from 15 to 55 mph for at'}, {'start': '394.560', 'end': '400.560', 'text': 'least 40 minutes to facilitate recovery'}, {'start': '397.680', 'end': '403.039', 'text': 'of the long-term fuel trim for accurate'}, {'start': '400.560', 'end': '406.039', 'text': 'readings. After completing repairs'}, {'start': '403.039', 'end': '408.720', 'text': 'associated with'}, {'start': '406.039', 'end': '411.840', 'text': 'DTCP0172, it is crucial to conduct a'}, {'start': '408.720', 'end': '414.880', 'text': 'final verification process. Start by'}, {'start': '411.840', 'end': '417.319', 'text': 'utilizing the scan tool to clear the DTC'}, {'start': '414.880', 'end': '420.240', 'text': "from the powertrain control module's"}, {'start': '417.319', 'end': '422.400', 'text': "memory. Following this, it's essential"}, {'start': '420.240', 'end': '425.360', 'text': 'to monitor the vehicle for any'}, {'start': '422.400', 'end': '428.400', 'text': 'recurrence of the DTC during subsequent'}, {'start': '425.360', 'end': '430.880', 'text': 'driving cycles. Confirm that the vehicle'}, {'start': '428.400', 'end': '432.880', 'text': 'operates correctly without the presence'}, {'start': '430.880', 'end': '435.360', 'text': 'of any further check engine light'}, {'start': '432.880', 'end': '437.840', 'text': 'illumination. A thorough test drive'}, {'start': '435.360', 'end': '440.080', 'text': 'should be undertaken to simulate regular'}, {'start': '437.840', 'end': '442.400', 'text': 'driving conditions, providing an'}, {'start': '440.080', 'end': '445.759', 'text': 'opportunity to observe the long-term'}, {'start': '442.400', 'end': '448.280', 'text': 'fuel trims behavior. Once again, pay'}, {'start': '445.759', 'end': '450.720', 'text': 'close attention to whether the value'}, {'start': '448.280', 'end': '453.520', 'text': 'stabilizes, indicating successful'}, {'start': '450.720', 'end': '456.319', 'text': 'resolution of the rich fuel condition.'}, {'start': '453.520', 'end': '458.560', 'text': 'Verifying all these factors ensures an'}, {'start': '456.319', 'end': '461.560', 'text': 'effective and lasting repair. To'}, {'start': '458.560', 'end': '464.560', 'text': 'effectively prevent'}, {'start': '461.560', 'end': '466.400', 'text': 'DTCP0172 from recurring, implement'}, {'start': '464.560', 'end': '469.120', 'text': 'regular maintenance procedures'}, {'start': '466.400', 'end': '470.759', 'text': 'specifically focusing on the fuel system'}, {'start': '469.120', 'end': '473.840', 'text': 'and air intake'}, {'start': '470.759', 'end': '477.039', 'text': 'components. Schedule periodic checks to'}, {'start': '473.840', 'end': '480.000', 'text': 'monitor fuel trim values as this will'}, {'start': '477.039', 'end': '482.080', 'text': 'help identify any emerging issues before'}, {'start': '480.000', 'end': '485.280', 'text': 'they escalate into more significant'}, {'start': '482.080', 'end': '488.160', 'text': 'faults. It is also advisable to clean'}, {'start': '485.280', 'end': '490.400', 'text': 'fuel injectors regularly as clogged'}, {'start': '488.160', 'end': '492.879', 'text': 'injectors can lead to improper fuel'}, {'start': '490.400', 'end': '495.520', 'text': 'delivery and richness in the fuel'}, {'start': '492.879', 'end': '498.479', 'text': 'mixture. Ensure that the air filter is'}, {'start': '495.520', 'end': '500.879', 'text': 'checked and replaced if necessary as a'}, {'start': '498.479', 'end': '504.240', 'text': 'blocked air intake could adversely'}, {'start': '500.879', 'end': '506.879', 'text': 'affect the air fuel ratio.'}, {'start': '504.240', 'end': '509.840', 'text': 'Lastly, routine inspections of sensor'}, {'start': '506.879', 'end': '512.399', 'text': 'functions, including the air fuel ratio'}, {'start': '509.840', 'end': '515.440', 'text': 'sensors and the manifold absolute'}, {'start': '512.399', 'end': '517.919', 'text': 'pressure sensors, can be instrumental in'}, {'start': '515.440', 'end': '520.399', 'text': 'catching issues early and ensuring'}, {'start': '517.919', 'end': '524.279', 'text': 'optimal engine performance. In'}, {'start': '520.399', 'end': '526.959', 'text': 'conclusion, the understanding of'}, {'start': '524.279', 'end': '529.760', 'text': 'DTCP0172 is essential not only for'}, {'start': '526.959', 'end': '532.000', 'text': 'addressing current issues, but also for'}, {'start': '529.760', 'end': '534.399', 'text': "maintaining the vehicle's overall"}, {'start': '532.000', 'end': '537.040', 'text': 'health. Recognizing the role the'}, {'start': '534.399', 'end': '538.959', 'text': 'powertrain control module plays along'}, {'start': '537.040', 'end': '542.000', 'text': 'with the importance of the sensors in'}, {'start': '538.959', 'end': '543.480', 'text': 'managing air fuel mixtures is crucial'}, {'start': '542.000', 'end': '546.080', 'text': 'for effective'}, {'start': '543.480', 'end': '548.560', 'text': 'diagnosis. Regular monitoring of fuel'}, {'start': '546.080', 'end': '550.959', 'text': 'trim values can serve as an early'}, {'start': '548.560', 'end': '553.440', 'text': 'detection method for malfunctions,'}, {'start': '550.959', 'end': '555.800', 'text': 'allowing for proactive repairs. The'}, {'start': '553.440', 'end': '558.080', 'text': 'troubleshooting steps outlined in this'}, {'start': '555.800', 'end': '560.640', 'text': 'presentation provide a structured'}, {'start': '558.080', 'end': '563.440', 'text': 'approach that technicians can follow to'}, {'start': '560.640', 'end': '566.399', 'text': 'ensure accuracy and thorowness in'}, {'start': '563.440', 'end': '569.120', 'text': 'diagnosing the issue. Finally,'}, {'start': '566.399', 'end': '571.279', 'text': 'emphasizing preventive maintenance can'}, {'start': '569.120', 'end': '573.600', 'text': 'extend the life of the vehicle while'}, {'start': '571.279', 'end': '575.279', 'text': 'reducing the likelihood of DTC'}, {'start': '573.600', 'end': '576.680', 'text': 'reoccurrence.'}, {'start': '575.279', 'end': '579.680', 'text': 'Addressing'}, {'start': '576.680', 'end': '582.160', 'text': 'P0172 efficiently and effectively'}, {'start': '579.680', 'end': '584.880', 'text': 'ensures that the Honda Accord operates'}, {'start': '582.160', 'end': '587.720', 'text': 'at optimal performance, reducing'}, {'start': '584.880', 'end': '590.240', 'text': 'emissions and enhancing fuel'}, {'start': '587.720', 'end': '594.399', 'text': 'economy. Please like and subscribe to'}, {'start': '590.240', 'end': '594.399', 'text': 'the channel. See you next time.'}]