Código de avería P0117: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to all 1996-newer vehicles (Honda, Toyota, Volkswagen VW, Mazda, Dodge, Ford, BW, etc.). Although generic, the specific repair steps may vary depending on make/model. The ECT (Engine coolant temperature) sensor is a thermistor located in the engine block or other coolant passage. It changes resistance with changes in temperature of the coolant that it’s in contact with. It’s usually a two wire sensor. One wire is a 5 volt reference from PCM (Powertrain Control Module) and the other is a ground supplied from PCM. As the temperature of the coolant changes, the resistance of the sensor changes. When the engine is cold, the resistance is high. When the engine is warm, the resistance is low. If the PCM detects a signal voltage lower than the normal operating range of the sensor then P0117 code will set. An example of an Engine Coolant Temperature ECT sensor
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Código de avería P0108: 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 MAP (Manifold Absolute Pressure) sensor measures engine manifold negative air pressure. It’s usually a three wire sensor: a ground wire, a 5 volt reference wire from the PCM (Powertrain Control Module) to the MAP sensor, and a signal wire that informs the PCM of the MAP sensor voltage reading as it changes. The higher the engine vacuum, the lower the voltage reading. The voltage should range between about 1 volt (at idle) to about 5 volts (WOT wide open throttle). If the PCM sees the voltage reading from the MAP sensor is greater than 5 Volts, or if the voltage reading is higher than what the PCM considers normal under certain circumstances, a P0108 DTC will set. A typical MAP sensor
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Código de avería P0118: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to all 1996-newer vehicles (Honda, Toyota, Volkswagen VW, Mazda, Dodge, Ford, BW, etc.). Although generic, the specific repair steps may vary depending on make/model. The engine coolant temperature (ECT) sensor is a thermistor screwed into a coolant passage in the cylinder head. Sensor resistance is high when coolant temperature is low and resistance drops when coolant temperature increases. The powertrain control module (PCM) provides a 5 volt reference and a ground to the sensor. The PCM monitors voltage drop to determine coolant temperature. If the ECT reads less than freezing temp. when engine has been running for more than a few minutes, the PCM determines a circuit fault and sets this code. Or if the PCM determines the sensor resistance is out of specs, this code is set. An example of an Engine Coolant Temperature ECT sensor
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Código de avería P0109: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to all 1996-newer vehicles (Ford, Hyundai, Kia, Mazda, Mercedes Benz, etc.). Although generic, the specific repair steps may vary depending on make/model. When I discover that a P0109 code has been stored, I know that it means that the powertrain control module (PCM) has detected an intermittent manifold absolute pressure/barometric pressure reading from the manifold absolute pressure sensor (MAP) or the barometric pressure sensor (BPS). The MAP sensor is designed to enable the PCM to monitor variations in atmospheric pressure using absolute intake manifold pressure. Atmospheric pressure is directly related to the particular degree of altitude, as it applies to your vehicle. The MAP sensor is usually supplied with a reference voltage (5-volt) signal, a battery ground, and one (or more) output signal circuit/s. MAP sensor resistance levels react to changes in absolute manifold pressure. Changing resistance levels in the MAP sensor create variations in sensor output voltage to the PCM. These varying voltage signals are not only used by the PCM to calaculate fuel delivery and ignition timing, but also compared with programmed specifications. If input voltage fails to comply with programmed specifications, under certain circumstances for a set period of time, a P0109 will be stored and a malfunction indicator lamp (MIL) may be illuminated. There are several different system of monitoring manifold absolute/barometric pressure. Consult your vehicle service manual or All Data (DIY) to determine the exact MAP sensor design of your vehicle. An example of a MAP sensor Several manufacturers use a MAP sensor and a separate barometric pressure sensor. In this case, the MAP sensor is mounted away from the engine and has a vacuum hose connected to it. The degree of engine intake vacuum is gathered by the sensor and input to the PCM, where it is compared with the input signal from the barometric pressure sensor, intake air temperature, and other factors to determine actual altitude (elevation above sea level). If the MAP sensor and BPS input signals vary by more than the specified degree, a P0109 will be stored and a MIL illuminated. Most automakers integrate the MAP sensor with the BPS. In this type of system, the sensor is mounted to the engine intake manifold. The scanner data stream may reflect only manifold absolute pressure instead of MAP and barometric pressure for this type of system.
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Código de avería P0119: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to all 1996-newer vehicles (Ford, Hyundai, Kia, Mazda, Mercedes-Benz, etc.). Although generic, the specific repair steps may vary depending on make/model. When I connect my code reader to a vehicle and find a stored P0119, I know that the powertrain control module (PCM) has detected an intermittent signal from the engine coolant temperature (ECT) sensor. The PCM monitors ECT using a reference circuit (typically five-volts) that is completed by the ECT sensor. If separate ECT sensors are used (one for the PCM and another for the temperature gauge), the sensor itself is usually of a two-wire design. The first wire carries the five-volt reference and the second wire is the ground wire. The ECT sensor is usually a negative coefficient sensor, which means that as sensor temperature is increased, resistance decreases. The variation in sensor resistance translates into fluctuations in circuit voltage that are recognized by the PCM as changes in ECT. If the PCM and the temperature gauge use the same ECT sensor, then the sensor will be of a three-wire design. It reacts to temperature the same way as the two-wire sensor but one wire feeds an input signal to the gauge and one wire feeds an input signal to the PCM. Simple, huh? Although ECT location will differ between manufacturers, it will always be threaded directly into an engine coolant passage. Many automakers place the ECT sensor in the cylinder block or cylinder head, others thread it into one of the intake manifold coolant passages, and some locate it in the thermostat housing. With the ECT sensor threaded into the engine, the tip of the sensor, which contains the thermistor, protrudes into the coolant passage. With the engine running, coolant should constantly flow across the tip. As engine coolant increases in temperature, so does the thermistor inside of the ECT sensor. The PCM uses engine temperature to help calculate fuel delivery, idle speed, and ignition timing. The ECT sensor input is critical because the engine control system must function differently as engine temperature changes from ambient temperature to more than 220-degrees Fahrenheit. The PCM also uses the ECT sensor input to initiate electric cooling fan operation. If the PCM receives input signals from the ECT sensor that are erratic or intermittent, during a set period of time and under certain circumstances, a code P0119 will be stored and a malfunction indicator lamp (MIL) may be illuminated. An example of an Engine Coolant Temperature ECT sensor
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Código de avería P010A: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles that have a mass airflow sensor. Brands include but are not limited to Toyota, Infiniti, Nissan, Jaguar, Audi, Mercedes, Dodge, Hyundai, Chevy, Ford, etc. Although generic, the specific repair steps may vary depending on make/model. The MAF (mass air flow) sensor is a sensor mounted in a vehicle’s engine air intake tract downstream from the air filter, and is used to measure the volume and density of air being drawn into the engine. The MAF sensor itself only measures a portion of the air entering and that value is used to calculate the total volume and density of air being ingested. The powertrain control module (PCM) uses that reading along with other sensor parameters to ensure proper fuel delivery at any given time for optimum power and fuel efficiency. This P010A diagnostic trouble code (DTC) means that there is a detected problem with the Mass Air Flow (MAF) sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not performing within the normal expected range of the calculated MAF value. Refer to a vehicle specific repair manual to determine which is the B circuit in your application. Note: Some MAF sensors also incorporate an air temperature sensor, which is another value used by the PCM for optimal engine operation. Closely related MAF circuit trouble codes include P010B, P010C, P010D, and P010E. Photo of a MAF sensor:
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Código de avería P011A: This generic powertrain diagnostic trouble code (DTC) typically applies to all OBD-II vehicles. That may include but is not limited to vehicles from Mazda, Land Rover, GMC, Chevy, Ford, Dodge, Chrysler, Toyota, Honda, etc. Although generic, the specific repair steps may vary depending on make/model. On the rare occasion that a code P011A is stored in an OBD-II vehicle, it means that the powertrain control module (PCM) has detected a problem with the correlating signals between two separate engine coolant temperature (ECT) sensors. These sensors have been designated as A and B but could also be called primary and secondary. Obviously, this code is used only in vehicles with multiple ECT sensors. Typically, ECT sensors are composed of a thermal resistor that is surrounded by a durable resin in a brass, aluminum, or plastic housing. The housing is designed to thread into the engine block, radiator, intake manifold (coolant passage), or cylinder head. The ECT sensor is shaped and positioned so that, once the thermostat has opened, engine coolant may flow across the tip. The exposed resistor is in the tip of the sensor. As the flowing engine coolant temperature increases, the level of resistance in the ECT resistor decreases. This allows circuit voltage to increase. The PCM recognizes these variations in ECT voltage as changes in engine coolant temperature. The ECT sensor/s provides data to the PCM, for drivability strategy and electronic cooling fan operation, but may also serve to provide a signal to the temperature gauge in the instrument cluster. If the PCM detects independent voltage signals from the separate ECT sensors which differ by more than a preprogrammed degree, a code P011A will be stored and a malfunction indicator lamp (MIL) may be illuminated. Multiple failure cycles may be required for MIL illumination on certain models.
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Código de avería P010B: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles (Nissan, Chevrolet, GMC, VW, Toyota, Mazda, Ford, Audi, Honda, etc.). Although generic, the specific repair steps may vary depending on make/model. The MAF (mass air flow) sensor is a sensor mounted in a vehicle’s engine air intake tract downstream from the air filter, and is used to measure the volume and density of air being drawn into the engine. The MAF sensor itself only measures a portion of the air entering and that value is used to calculate the total volume and density of air being ingested. The powertrain control module (PCM) uses that reading along with other sensor parameters to ensure proper fuel delivery at any given time for optimum power and fuel efficiency. Basically this P010B diagnostic trouble code (DTC) means that there is a problem with the Mass Air Flow "B" sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not within a predetermined expected range of the calculated MAF value. Refer to a make/model specific repair manaul to determine which is the "B" circuit for your vehicle. Note: Some MAF sensors also incorporate an air temperature sensor, which is another value used by the PCM for optimal engine operation. Closely related MAF circuit trouble codes include: P010A Mass or Volume Air Flow "A" Circuit Malfunction P010C Mass or Volume Air Flow "A" Circuit Low Input P010D Mass or Volume Air Flow "A" Circuit High Input P010E Mass or Volume Air Flow "A" Circuit Intermittent Photo of a MAF sensor:
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Código de avería P011C: This generic powertrain diagnostic trouble code (DTC) typically applies to all OBD-II vehicles. That may include but is not limited to vehicles from Nissan, Toyota, Chevrolet, GMC, Ford, Dodge, Vauxhall, etc. Although generic, the exact repair steps may vary depending on make/model. A stored code P011C means that the powertrain control module (PCM) has detected a discrepancy in the correlating signals between the charge air temperature (CAT) sensor and the intake air temperature (IAT) sensor for engine bank number one. Bank 1 refers to the engine bank that contains the number one cylinder. As you can probably tell by the code description, this code is used only in vehicles that are equipped with forced air induction devices and multiple intake air inlet sources. Intake air inlet sources are called throttle bodies. Forced air induction devices include turbochargers and superchargers. CAT sensors are normally composed of a thermal resistor that protrudes from the housing on a wire pedestal. The resistor is positioned so that ambient air entering the engine intake, after leaving the intercooler (sometimes called the air charge cooler), may flow across it. The housing is normally designed to thread or bolt into a turbocharger/supercharger inlet pipe, near the intercooler). As charge air temperature increases, the level of resistance in the CAT resistor decreases; causing circuit voltage to move towards the reference maximum. The PCM sees these variations in CAT sensor voltage as changes in charge air temperature. The CAT sensor/s provides data to the PCM for boost pressure solenoid operation and boost pressure release valve operation, as well as certain facets of fuel delivery and ignition timing calculation. The IAT sensor acts in much the same manner as the CAT sensor; in fact, some early (pre OBD-II) computerized vehicle service manuals described the intake air temperature sensor as an air charge temperature sensor. The IAT sensor is positioned so that ambient intake air is drawn across it as it is enters the engine intake. The IAT sensor is located near the air filter housing or air inlet pipe. A code P011C will be stored and a malfunction indicator lamp (MIL) may be illuminated if the PCM detects voltage signals from the CAT sensor and the IAT sensor which differ by more than a preprogrammed degree. Multiple ignition cycles, with a failure, may be required for MIL illumination.
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Código de avería P010C: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles that have a mass airflow sensor. Brands include but are not limited to Toyota, Infiniti, Nissan, Jaguar, Audi, Mercedes, Dodge, Hyundai, Chevy, Ford, etc. Although generic, the specific repair steps may vary depending on make/model. The MAF (mass air flow) sensor is a sensor mounted in a vehicle’s engine air intake tract downstream from the air filter, and is used to measure the volume and density of air being drawn into the engine. The MAF sensor itself only measures a portion of the air entering and that value is used to calculate the total volume and density of air being ingested. The powertrain control module (PCM) uses that reading along with other sensor parameters to ensure proper fuel delivery at any given time for optimum power and fuel efficiency. This P010C diagnostic trouble code (DTC) means that there is a low condition detected in the Mass Air Flow (MAF) B sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not performing within the normal expected range of the calculated MAF value. Refer to a vehicle specific repair manual to determine which is the B circuit in your application. Note: Some MAF sensors also incorporate an air temperature sensor, which is another value used by the PCM for optimal engine operation. Closely related MAF circuit trouble codes include P010A, P010B, P010D, and P010E. Photo of a MAF sensor:
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