DTC P0128: Mal funcionamiento del sistema de refrigeración - Honda Accord 2012-2017
DIY Honda Garage Español
[{'start': '5.000', 'end': '9.501', 'text': "Welcome to today's diagnostic presentation"}, {'start': '9.501', 'end': '14.002', 'text': 'focusing on DTC P0128, which indicates a'}, {'start': '14.002', 'end': '18.502', 'text': 'cooling system malfunction on'}, {'start': '18.502', 'end': '23.003', 'text': '2012 to 2017 Honda Accord models. This specific error code points to'}, {'start': '23.003', 'end': '27.504', 'text': 'issues related to the thermostat and'}, {'start': '27.504', 'end': '32.005', 'text': 'engine coolant temperature sensors.  The thermostat controls the flow of'}, {'start': '32.005', 'end': '36.506', 'text': 'engine coolant, affecting how quickly the engine reaches'}, {'start': '36.506', 'end': '41.006', 'text': 'optimal operating temperature.  When the thermostat is stuck'}, {'start': '41.006', 'end': '45.507', 'text': 'open, it causes delayed engine warm-up and increased'}, {'start': '45.507', 'end': '50.008', 'text': 'exhaust emissions.  It is essential to understand that the'}, {'start': '50.008', 'end': '54.509', 'text': 'affected engine type is K24W1, and the'}, {'start': '54.509', 'end': '59.010', 'text': 'Powertrain Control Module (PCM) monitors coolant temperatures'}, {'start': '59.010', 'end': '63.510', 'text': 'to evaluate thermostat functionality.  Accurately diagnosing this problem'}, {'start': '63.510', 'end': '68.011', 'text': 'is vital to ensuring efficient'}, {'start': '68.011', 'end': '72.512', 'text': 'engine performance and compliance with emissions regulations.'}, {'start': '72.512', 'end': '77.475', 'text': 'DTC P0128 signifies a malfunction within the'}, {'start': '77.475', 'end': '82.438', 'text': 'cooling system, specifically related to the operation of the thermostat.  The'}, {'start': '82.438', 'end': '87.402', 'text': 'thermostat remains closed when the engine coolant temperature'}, {'start': '87.402', 'end': '92.365', 'text': 'is low, preventing coolant circulation.  Once'}, {'start': '92.365', 'end': '97.328', 'text': 'the coolant temperature increases, it opens to regulate'}, {'start': '97.328', 'end': '102.291', 'text': 'cooling effectively.  If stuck open, the'}, {'start': '102.291', 'end': '107.254', 'text': 'vehicle experiences prolonged warm-up times and increased'}, {'start': '107.254', 'end': '112.218', 'text': 'exhaust emissions.  The PCM, located in the'}, {'start': '112.218', 'end': '117.181', 'text': 'engine compartment, uses engine coolant temperature'}, {'start': '117.181', 'end': '122.144', 'text': '(ECT) sensors in both the engine block and'}, {'start': '122.144', 'end': '127.107', 'text': 'radiator to continuously monitor temperatures.  Understanding the role of the'}, {'start': '127.107', 'end': '132.070', 'text': 'PCM is vital, as it uses these readings to perform'}, {'start': '132.070', 'end': '137.034', 'text': 'additional calculations about coolant dynamics based on'}, {'start': '137.034', 'end': '141.997', 'text': 'driving conditions, directly impacting engine performance and'}, {'start': '141.997', 'end': '146.960', 'text': 'emissions control.  There'}, {'start': '146.960', 'end': '151.494', 'text': 'are several potential causes for DTC P0128,'}, {'start': '151.494', 'end': '156.029', 'text': 'making a thorough diagnosis crucial.  First among them'}, {'start': '156.029', 'end': '160.564', 'text': 'is thermostat failure, which occurs if the component'}, {'start': '160.564', 'end': '165.098', 'text': 'gets stuck open, hindering coolant circulation.'}, {'start': '165.098', 'end': '169.633', 'text': 'Next, the engine coolant temperature (ECT) sensor'}, {'start': '169.633', 'end': '174.167', 'text': 'may fail, either providing incorrect readings or failing completely,'}, {'start': '174.167', 'end': '178.702', 'text': 'leading to erroneous PCM calculations.  The'}, {'start': '178.702', 'end': '183.236', 'text': 'intake air temperature (IAT) sensor may also be at'}, {'start': '183.236', 'end': '187.771', 'text': 'fault, as it plays a critical role in determining how much'}, {'start': '187.771', 'end': '192.305', 'text': 'air is entering the engine.  Problems can also arise with the'}, {'start': '192.305', 'end': '196.840', 'text': 'manifold absolute pressure (MAP) sensor or the'}, {'start': '196.840', 'end': '201.374', 'text': 'crankshaft position (CKP) sensor, both of which impact'}, {'start': '201.374', 'end': '205.909', 'text': 'performance.  Finally, a failure in the'}, {'start': '205.909', 'end': '210.443', 'text': 'barometric pressure sensor could affect overall engine function, emphasizing'}, {'start': '210.443', 'end': '214.978', 'text': 'the need for thorough diagnostic testing to identify the root'}, {'start': '214.978', 'end': '219.512', 'text': 'of the problem.'}, {'start': '219.512', 'end': '224.309', 'text': 'When diagnosing DTC P0128, you may notice several key symptoms'}, {'start': '224.309', 'end': '229.105', 'text': 'that indicate an underlying problem.  A primary symptom is'}, {'start': '229.105', 'end': '233.902', 'text': 'poor engine warm-up, as the failure of the thermostat'}, {'start': '233.902', 'end': '238.698', 'text': 'to close properly prolongs the time it takes for'}, {'start': '238.698', 'end': '243.495', 'text': 'the engine to reach optimal operating temperature.  This inefficiency'}, {'start': '243.495', 'end': '248.291', 'text': 'can also lead to increased emissions, compromising'}, {'start': '248.291', 'end': '253.088', 'text': 'environmental standards and potentially triggering emissions-related alerts.'}, {'start': '253.088', 'end': '257.885', 'text': 'Engine performance problems are also common, with'}, {'start': '257.885', 'end': '262.681', 'text': 'the vehicle experiencing rough idling or difficulty maintaining'}, {'start': '262.681', 'end': '267.478', 'text': 'speed.  Drivers may notice fluctuating temperature gauges,'}, {'start': '267.478', 'end': '272.274', 'text': 'providing visual clues that something is wrong with'}, {'start': '272.274', 'end': '277.071', 'text': 'the engine cooling system.  The combination of these'}, {'start': '277.071', 'end': '281.867', 'text': 'symptoms suggests that the thermostat, ECT sensor, or'}, {'start': '281.867', 'end': '286.664', 'text': 'related components are not functioning properly.'}, {'start': '286.664', 'end': '291.407', 'text': 'In the first step of diagnosing DTC P0128, begin by'}, {'start': '291.407', 'end': '296.150', 'text': 'starting the engine under the specified enabled conditions.'}, {'start': '296.150', 'end': '300.892', 'text': 'Effective monitoring requires engine off time of'}, {'start': '300.892', 'end': '305.635', 'text': 'at least 6 hours, along with an intake air temperature'}, {'start': '305.635', 'end': '310.378', 'text': 'that falls within the operating range described in'}, {'start': '310.378', 'end': '315.121', 'text': 'the diagnostic data.  After confirming these conditions, drive'}, {'start': '315.121', 'end': '319.863', 'text': 'the vehicle at speeds between 15 and 75 mph for'}, {'start': '319.863', 'end': '324.606', 'text': 'at least 30 minutes, as this allows the'}, {'start': '324.606', 'end': '329.349', 'text': 'PCM to evaluate whether normal coolant temperatures are being reached.  It'}, {'start': '329.349', 'end': '334.092', 'text': 'is crucial that environmental conditions allow such driving to'}, {'start': '334.092', 'end': '338.834', 'text': 'ensure reliable readings.  Following this procedure helps determine whether'}, {'start': '338.834', 'end': '343.577', 'text': 'the problem persists due to misdiagnosis or will be'}, {'start': '343.577', 'end': '348.320', 'text': 'resolved through normal operations.'}, {'start': '348.320', 'end': '353.204', 'text': 'In the second diagnostic step for DTC P0128,'}, {'start': '353.204', 'end': '358.088', 'text': 'using the Honda diagnostic system is key to checking for'}, {'start': '358.088', 'end': '362.972', 'text': 'any potential diagnostic trouble codes that may illuminate'}, {'start': '362.972', 'end': '367.856', 'text': 'additional problems with the cooling system.  Confirm that'}, {'start': '367.856', 'end': '372.740', 'text': 'the conditions described for effective monitoring have been met.  This'}, {'start': '372.740', 'end': '377.624', 'text': 'confirmation procedure helps verify that the PCM has'}, {'start': '377.624', 'end': '382.508', 'text': 'correctly recorded engine temperatures and that there are no'}, {'start': '382.508', 'end': '387.392', 'text': 'other active DTCs that could affect performance.  Addressing'}, {'start': '387.392', 'end': '392.276', 'text': 'any accompanying faults is vital, as the presence of'}, {'start': '392.276', 'end': '397.160', 'text': 'multiple DTCs can skew diagnostic results.  Understanding how to'}, {'start': '397.160', 'end': '402.044', 'text': 'use diagnostics effectively ensures that every aspect'}, {'start': '402.044', 'end': '406.928', 'text': 'of the engine cooling system is properly evaluated.'}, {'start': '406.928', 'end': '411.618', 'text': 'The final repair check for DTC P0128 involves'}, {'start': '411.618', 'end': '416.309', 'text': 'a series of critical checks to ensure effective rectification'}, {'start': '416.309', 'end': '420.999', 'text': 'of the problem.  First, check for any recurrence of the'}, {'start': '420.999', 'end': '425.689', 'text': 'diagnostic trouble code after addressing the initial problem,'}, {'start': '425.689', 'end': '430.379', 'text': 'as this confirms that the repairs performed have'}, {'start': '430.379', 'end': '435.070', 'text': 'resolved the malfunction.  Next, ensure'}, {'start': '435.070', 'end': '439.760', 'text': 'the entire cooling system is functioning properly, including'}, {'start': '439.760', 'end': '444.450', 'text': 'thorough inspections and verifying that the thermostat, sensors, and'}, {'start': '444.450', 'end': '449.141', 'text': 'PCM are working within their designated operating parameters.  After'}, {'start': '449.141', 'end': '453.831', 'text': 'these checks, it is strongly recommended to perform a'}, {'start': '453.831', 'end': '458.521', 'text': 'road test, simulating the same driving conditions as before to'}, {'start': '458.521', 'end': '463.211', 'text': 'assess whether the vehicle maintains its operating efficiency.  Completing this'}, {'start': '463.211', 'end': '467.902', 'text': 'final check ensures both driver safety and'}, {'start': '467.902', 'end': '472.592', 'text': 'vehicle performance.'}, {'start': '472.592', 'end': '477.158', 'text': 'Participating in preventative maintenance can significantly reduce the likelihood'}, {'start': '477.158', 'end': '481.723', 'text': 'of encountering DTC P0128 and similar problems in the'}, {'start': '481.723', 'end': '486.289', 'text': 'future.  First, regularly checking engine coolant levels'}, {'start': '486.289', 'end': '490.854', 'text': 'is crucial, as low coolant levels can'}, {'start': '490.854', 'end': '495.420', 'text': "affect the thermostat's ability to function properly."}, {'start': '495.420', 'end': '499.985', 'text': "Second, periodically inspecting the thermostat's operation ensures that it"}, {'start': '499.985', 'end': '504.551', 'text': 'is not stuck in a closed or open position, allowing for'}, {'start': '504.551', 'end': '509.116', 'text': 'quick repairs before symptoms escalate.  Additionally, monitoring'}, {'start': '509.116', 'end': '513.682', 'text': 'overall engine performance can help identify discrepancies that'}, {'start': '513.682', 'end': '518.247', 'text': 'could lead to bigger problems down the road.  Keeping an eye'}, {'start': '518.247', 'end': '522.813', 'text': 'on unusual temperatures and operating conditions provides insight,'}, {'start': '522.813', 'end': '527.378', 'text': 'enabling proactive action and ensuring the reliability of your Honda'}, {'start': '527.378', 'end': '531.944', 'text': 'Accord.'}, {'start': '531.944', 'end': '536.916', 'text': 'In conclusion, addressing DTC P0128 requires a thorough understanding'}, {'start': '536.916', 'end': '541.888', 'text': 'of the cooling system, specifically the role of the thermostat and'}, {'start': '541.888', 'end': '546.860', 'text': 'ECT sensors.  Recognizing that the thermostat regulates'}, {'start': '546.860', 'end': '551.832', 'text': 'coolant temperature directly impacts engine efficiency and'}, {'start': '551.832', 'end': '556.804', 'text': 'emission levels.  Thorough monitoring'}, {'start': '556.804', 'end': '561.776', 'text': 'of ECT sensor readings should be performed to ensure accurate evaluations'}, {'start': '561.776', 'end': '566.748', 'text': 'by the PCM, leading to effective diagnostic solutions.'}, {'start': '566.748', 'end': '571.720', 'text': 'Following detailed diagnostic steps is crucial to'}, {'start': '571.720', 'end': '576.692', 'text': 'accurately identify the root cause.  Finally, performing preventative maintenance can'}, {'start': '576.692', 'end': '581.664', 'text': 'extend vehicle longevity and improve performance.  By'}, {'start': '581.664', 'end': '586.636', 'text': 'applying these principles, you can ensure your Honda Accord operates'}, {'start': '586.636', 'end': '591.608', 'text': 'at peak efficiency.'}]