Código de avería P008D: This generic powertrain diagnostic trouble code (DTC) typically applies to diesel engine OBD-II vehicles. That may include but is not limited to vehicles from Ford / Powerstroke, BMW, Dodge / Ram / Cummins, Chevrolet, GMC, etc. Although generic, the specific repair steps may vary depending on make/model. Trouble code P008D is one of several possible codes associated to diesel powered vehicles that indicates that the Powertrain Control Module (PCM) has detected a malfunction and with the operation of the Fuel Cooler Pump Control Circuit that is incorporated to facilitate the proper operation of a diesel engine. The codes that are commonly associated to Fuel Cooler Pump Control Circuit malfunctions are P008C, P008D and P008E. The purpose of the Fuel Cooler Pump Control Circuit is to control the operation of the fuel cooler pump. This feature is specific to diesel powered vehicles to cool the excess fuel prior to returning the fuel back to the fuel supply system. The fuel is cooled by the fuel cooler that operates in a similar manner to a radiator using coolant to remove heat from the fuel. The pump is temperature controlled by the Fuel Cooler Pump Control Circuit that turns the pump on to route fuel through the fuel cooler assembly prior to returning the fuel back to the fuel tank. This process will vary based on the specific diesel powered vehicle and the fuel system configuration. The end result is the same providing optimum performance and protecting fuel system components. Based of the specific diesel powered vehicle involved, various other codes may be activated by the PCM and illuminate the Check Engine Light as well. Code P008D is set by the PCM when the Fuel Cooler Pump Control Circuit has a low voltage condition. In this photo, you can see the fuel cooler, the lines, and the fuel cooler pump (center) connected to the lines:
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Código de avería P009D: This generic powertrain diagnostic trouble code (DTC) typically applies to all OBD-II vehicles. That may include but is not limited to vehicles from Dodge, Ram, Chevy, Ford, GMC, Saturn, etc. Although generic, the specific repair steps may vary depending on make/model. The P009D OBD-II trouble code is one of five possible codes that indicates that the Powertrain Control Module (PCM) has detected a malfunction and with the operation of the Fuel Pressure Relief Control Circuit. The codes that are associated with Fuel Pressure Relief malfunctions are P009B, P009C, P009D, P009E, and P009F. The purpose of the Fuel Pressure Relief Control Circuit is to control the amount and pressure of the fuel delivered to the engine to operate properly. The PCM monitors the fuel pressure regulator and opens the fuel pressure relief valve to return excess fuel back to the fuel supply system. Code P009D is set by the PCM when the Fuel Pressure Relief Control Circuit has a high voltage condition.
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Código de avería P008E: This generic powertrain diagnostic trouble code (DTC) typically applies to diesel engine OBD-II vehicles. That may include but is not limited to vehicles from Ford / Powerstroke, BMW, Dodge / Ram / Cummins, Chevrolet, GMC, etc. Although generic, the specific repair steps may vary depending on make/model. Trouble code P008E is one of several possible codes associated to diesel powered vehicles that indicates that the Powertrain Control Module (PCM) has detected a malfunction and with the operation of the Fuel Cooler Pump Control Circuit that is incorporated to facilitate the proper operation of a diesel engine. The codes that are commonly associated to Fuel Cooler Pump Control Circuit malfunctions are P008C, P008D and P008E. The purpose of the Fuel Cooler Pump Control Circuit is to control the operation of the fuel cooler pump. This feature is specific to diesel powered vehicles to cool the excess fuel prior to returning the fuel back to the fuel supply system. The fuel is cooled by the fuel cooler that operates in a similar manner to a radiator using coolant to remove heat from the fuel. The pump is temperature controlled by the Fuel Cooler Pump Control Circuit that turns the pump on to route fuel through the fuel cooler assembly prior to returning the fuel back to the fuel tank. This process will vary based on the specific diesel powered vehicle and the fuel system configuration. The end result is the same providing optimum performance and protecting fuel system components. Based of the specific diesel powered vehicle involved, various other codes may be activated by the PCM and illuminate the Check Engine Light as well. Code P008E is set by the PCM when the Fuel Cooler Pump Control Circuit has higher than normal voltage. In this photo, you can see the fuel cooler, the lines, and the fuel cooler pump (center) connected to the lines:
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Código de avería P009E: This generic powertrain diagnostic trouble code (DTC) typically applies to all OBD-II vehicles. That may include but is not limited to vehicles from Dodge, Ram, Chevy, Ford, GMC, Saturn, etc. Although generic, the specific repair steps may vary depending on make/model. The P009E OBD-II trouble code is one of five possible codes that indicates that the Powertrain Control Module (PCM) has detected a malfunction and with the operation of the Fuel Pressure Relief Control Circuit. The codes that are associated with Fuel Pressure Relief malfunctions are P009B, P009C, P009D, P009E, and P009F. The purpose of the Fuel Pressure Relief Control Circuit is to control the amount and pressure of the fuel delivered to the engine to operate properly. The PCM monitors the fuel pressure regulator and opens the fuel pressure relief valve to return excess fuel back to the fuel supply system. Code P009E is set by the PCM when the Fuel Pressure Relief Control Circuit stuck in the off position or has a performance condition.
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Código de avería P008F: This generic powertrain diagnostic trouble code (DTC) typically applies to many OBD-II vehicles. That may include but is not limited to vehicles from Mercedes-Benz, Chevrolet, Sprinter, GMC, Ford, etc. When your OBD-II equipped vehicle exhibits a service engine soon lamp and a code P008F is stored, it means that the powertrain control module (PCM) has detected a discrepancy in the correlating signals between perceived engine coolant temperature (ECT) and fuel temperature. Engine coolant temperature and fuel temperature are typically monitored in comparison only when the engine is at ambient temperature. ECT sensors are composed of a thermal resistor that is dipped in a hard resin and sealed in a metal or plastic housing. Brass is the most common metal used as ECT sensor housing material. The ECT housing is designed so that it may be threaded into a coolant passage in the engine intake manifold, cylinder head, or block. As warm coolant passes through the passages and across the ECT sensor, the level of thermal resistance in the ECT decreases. When engine coolants decreases in temperature, resistance increases and ECT sensor circuit voltage is reduced as a result. These fluctuations in resistance (which result in voltage variations) are interpreted by the PCM as changes in engine coolant temperature. ECT sensor input data is critical in calculating fuel delivery and ignition timing strategy. The fuel temperature sensor also uses a thermal resistor but it is of the low voltage variety. It is most often integrated into the fuel level sending unit and provides the PCM with a voltage signal that reflects fuel temperature whenever the ignition is in the ON position. Fuel temperature can be especially crucial to drivability in vehicle applications which utilize a diesel engine. Fuel temperature is also more of a concern in extremely cold climates. A code P008F will be stored and a malfunction indicator lamp (MIL) may be illuminated if the PCM detects a discrepancy (between the ECT sensor and the fuel temperature sensor) which varies by more than the maximum allowable parameters over a set period of time and under a certain set of circumstances. An example of a MAF sensor:
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Código de avería P009F: This generic powertrain diagnostic trouble code (DTC) typically applies to all OBD-II vehicles. That may include but is not limited to vehicles from Dodge, Ram, Chevy, Ford, GMC, Saturn, etc. Although generic, the specific repair steps may vary depending on make/model. The P009F OBD-II trouble code is one of five possible codes that indicates that the Powertrain Control Module (PCM) has detected a malfunction and with the operation of the Fuel Pressure Relief Control Circuit. The codes that are associated with Fuel Pressure Relief malfunctions are P009B, P009C, P009D, P009E, and P009F. The purpose of the Fuel Pressure Relief Control Circuit is to control the amount and pressure of the fuel delivered to the engine to operate properly. The PCM monitors the fuel pressure regulator and opens the fuel pressure relief valve to return excess fuel back to the fuel supply system. Code P009F is set by the PCM when the Fuel Pressure Relief Control Circuit stuck in the on position.
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Código de avería P0090: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles (GMC, Chevy, Chrsyler, Dodge, Jeep, Mitsubishi, VW, Toyota, etc.). Although generic, the specific repair steps may vary depending on make/model. A stored code P0090 means that the powertrain control module (PCM) has detected an open control circuit in the electronic fuel pressure regulator (designated 1). This designation is used in systems that incorporate multiple electronic fuel pressure regulators. This type of designation may refer to the engine bank but not exclusively. Also, the word open could be substituted for disconnected or broken. The electronic fuel pressure regulator is typically controlled by the PCM. A battery voltage signal and a ground signal are used to control a servo motor which positions a valve so that the desired level of fuel pressure can be achieved for any given set of circumstance. As voltage is applied to the electronic fuel pressure regulator servo motor, the valve is opened in small increments and fuel pressure is increased. When voltage is decreased, the servo retracts and a strong spring forces the valve to close; fuel pressure is decreased. The fuel pressure sensor (usually located in the fuel injector rail) allows the PCM to monitor fuel pressure and adjust fuel pressure regulator voltage accordingly. The fuel pressure regulator and fuel pressure sensor may be separate components but are most often integrated into a single housing which has one electrical connector. If actual fuel pressure fails to comply with desired fuel pressure, as calculated by the PCM, a P0090 may be stored and a malfunction indicator lamp (MIL) illuminated. Related fuel pressure regulator engine codes: P0089 Fuel Pressure Regulator 1 Performance P0091 Fuel Pressure Regulator 1 Control Circuit Low P0092 Fuel Pressure Regulator 1 Control Circuit High
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Código de avería P0091: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles (Isuzu, Mazda, Dodge, Chrysler, Ford, GMC, Chevy, Toyota, Honda, etc.). Although generic, the specific repair steps may vary depending on make/model. When a code P0091 is stored, it means that the powertrain control module (PCM) has detected a low voltage signal from the control circuit of the electronic fuel pressure regulator designated 1. The numeral designation 1 is used in systems which have multiple electronic fuel pressure regulators. It may refer to a particular engine bank but not always. Typically, the electronic fuel pressure regulator is controlled by the PCM. Battery voltage and ground signals are used to control a servo motor which positions the regulator valve so that the desired level of fuel pressure is achieved for any given situation. The fuel pressure sensor is located in the fuel injector rail and allows the PCM to monitor fuel pressure so that it can adjust fuel pressure regulator voltage as necessary. As voltage is increased at the electronic fuel pressure regulator servo motor, the valve is opened and fuel pressure is increased. Decreased voltage at the servo causes it to retract and fuel pressure decreases. Most often, the fuel pressure regulator and fuel pressure sensor are integrated into a single housing (with one electrical connector) but may be separate components. If actual fuel pressure regulator control circuit voltage is less than a desired level, as calculated by the PCM, a P0091 will be stored and a malfunction indicator lamp (MIL) may be illuminated. Related fuel pressure regulator engine codes: P0089 Fuel Pressure Regulator 1 Performance P0090 Fuel Pressure Regulator 1 Control Circuit P0092 Fuel Pressure Regulator 1 Control Circuit High
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Código de avería P0092: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles (Isuzu, Mazda, Dodge, Chrysler, Ford, GMC, Chevy, Toyota, Honda, etc.). Although generic, the specific repair steps may vary depending on make/model. In my experience with diagnosing a code P0092, it has meant that the powertrain control module (PCM) has detected a high voltage signal from the control circuit of the electronic fuel pressure regulator designated with a 1. Systems which have multiple electronic fuel pressure regulators use a numerical designation. It may refer to a certain engine bank but not always. The PCM typically controls the electronic fuel pressure regulator. Battery voltage and ground signals are used to control a servo motor (in the fuel pressure regulator) which positions a valve so that the desired level of fuel pressure may be achieved for any given situation. In order to adjust fuel pressure regulator voltage, when necessary, the PCM monitors the fuel pressure sensor which is located in the fuel injector rail. When voltage is increased at the electronic fuel pressure regulator servo motor, a valve is opened and fuel pressure is increased. Decreased voltage at the servo causes the valve to close and fuel pressure decreases. The fuel pressure regulator and fuel pressure sensor are most frequently integrated into a single housing (with one electrical connector) but may be separate components. If actual fuel pressure regulator control circuit voltage is less than an expected degree, as computed by the PCM, a P0092 will be stored and a malfunction indicator lamp (MIL) may be illuminated. Related fuel pressure regulator engine codes: P0089 Fuel Pressure Regulator 1 Performance P0090 Fuel Pressure Regulator 1 Control Circuit P0091 Fuel Pressure Regulator 1 Control Circuit Low
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Código de avería P0093: This diagnostic trouble code (DTC) is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model. When the computer sets this code it senses a large fuel leak in the high pressure section of the engine. The ECM in a diesel always monitors and controls the fuel pressure from the fuel injector pump to the injectors as long as the engine is running. To set a code P0093 the ECM must sense a sudden large drop in fuel pressure within the system. This drop in fuel pressure can be internal, external or caused by a faulty sensor signal to the ECM. When this happens, the ECM sets the code, goes into fail-safe mode which will suspend the fuel injector pump operation and allow one minute to pull over before it shuts the engine down. It will remain in fail-safe mode until the key is off. The engine may run again but investigate the problem first. This problem will not correct itself or go away. The engine could shut down at any time or speed. Unlike gasoline engines with fuel injection pressures of 30 to 50 PSI, diesel engine fuel pressure runs up in the Megapascal range, from 4,500 to 30,000 PSI. It takes very high fuel pressure to force fuel into the high compression cylinder of a diesel. As you progress in diagnosing the problem be always mindful of the fuel pressure when the engine is running. It is ridiculously high! You have a code P0093 stating there is a large fuel leak in the system. Use caution when sticking your nose under the hood of a running engine with this code, or wrenching on the fuel system.
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