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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Código de avería P0094: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to all 1996-newer vehicles (Ford, GMC, Chevrolet, VW, Dodge, etc.). Although generic, the specific repair steps may vary depending on make/model. When I come across a stored code P0094, it generally means that the powertrain control module (PCM) has detected a substantial decrease in fuel pressure. Fuel pressure specifications vary from one manufacturer to another and the PCM is programmed to monitor fuel pressure according to these specifications. This code is primarily used in diesel powered vehicles. Diesel fuel systems are monitored (by the PCM) using one or more fuel pressure sensors. Low pressure fuel is pumped from the storage tank to the high pressure injector pump via a supply (or transfer) pump that is usually either attached to the frame rail or inside the fuel tank. Once the fuel exits the injector pump, it can reach levels as high as 2,500 psi. Use caution when testing fuel pressure. These extreme fuel pressure conditions can be very hazardous. Although diesel fuel is not as combustible as gasoline, it is highly flammable especially under high pressure. Additionally, diesel fuel under these levels of pressure can penetrate the skin and enter the bloodstream. This can be harmful or even fatal under certain circumstances. Fuel pressure sensors are placed at strategic locations in the fuel delivery system. Typically, there will be at least one fuel pressure sensor for each segment of the fuel system; a sensor for the low pressure supply end and another for the high pressure delivery end. The fuel pressure sensors are normally of a three-wire design. Some manufacturers use battery voltage and others use a lesser degree of voltage (usually five-volts) as a reference for the PCM. Reference voltage and a ground signal are supplied to the sensor. The sensor provides the PCM with a voltage input signal. As fuel system pressure increases, the resistance level of the fuel pressure sensor decreases, allowing the voltage signal that is input to the PCM to increase accordingly. When fuel pressure decreases, resistance levels in the fuel pressure sensor increase, causing the voltage input signal to the PCM to decrease. If the fuel pressure sensor/s is operating normally, this cycle takes effect with each ignition cycle. If the PCM detects fuel system pressure that does not coincide with programmed specifications, during a set period of time and under certain circumstances, a code P0094 will be stored and a malfunction indicator lamp may be illuminated.
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Código de avería P0095: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model. The IAT (Intake Air Temperature) sensor is a thermistor, which basically means it measures air temperature by detecting resistance in the air. It’s usually located somewhere in the intake air ductwork, but can be located in the intake manifold on some applications. It is usually a two wire sensor supplied with a 5 volt reference wire (which also acts as a signal wire) from the PCM (Powertrain Control Module) and a ground wire. As air passes over the sensor the resistance changes. This change in resistance affects the 5 Volts supplied to the sensor accordingly. Colder air causes higher resistance and higher signal voltage & warmer air lower resistance and lower signal voltage. The PCM monitors this change in the 5 Volts and calculates air temperature. If the PCM detects a voltage that is out of normal operating range for the #2 sensor, P0095 will set.
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Código de avería P0096: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model. The IAT (Intake Air Temperature) sensor is a thermistor that varies resistance based upon the temperature of the engine intake air. Usually a two wire sensor. One wire is supplied 5 Volt from the PCM (Powertrain Control Module) and the other is a ground. The PCM monitors the change in the 5 Volt supplied to determine air temperature. When the intake air is cold, the resistance is high, resulting in a high signal voltage. When the intake air is warm, the reistance is low, resulting in a low signal voltage. This code means that the PCM saw a larger-than-normal change in a shorter-than-expected time on the #2 IAT signal circuit.
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