Código de avería P0141: 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. This code means that the heated circuit in the oxygen sensor on bank 1 decreases time needed to enter closed loop. Sensor #2 would be the second sensor downstream from the engine. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0141. See also: P0135 (Bank 1, Sensor 1).
codigo-p0141
Código de avería P0142: 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 oxygen sensors are critical to the engine running properly. It basically informs the PCM (Powertrain Control Module) of oxygen content of the exhaust. The PCM then uses this information to regulate fuel injector pulse. Inaccurate or faulty O2 sensors can cause the PCM to add or take away fuel based on the faulty O2 sensor voltage which can cause a host of problems. A P0142 code refers to the Bank 1,3 O2 sensor or the 3rd downstream (post-cat) O2 sensor on Bank 1. It is a four wire sensor. The PCM supplies a ground circuit and a reference voltage circuit of about 0.5 volts. Also for the O2 sensor heater element there is a battery voltage supply wire and another ground circuit for that. The O2 sensor heater allows the O2 sensor to warm up faster, thus achieving closed loop in less time than it would normally take for the exhaust to warm the sensor up to operating temperature. The O2 sensor varies the supplied reference voltage based on oxygen content in the exhaust. It is capable of varying from about 0.1 to 0.9 volts, 0.1v indicating lean exhaust and 0.9v indicating rich exhaust. This P0142 code indicates that the Bank 1,3 O2 sensor is stuck low for too long or isn’t active at all.
codigo-p0142
Código de avería P0143: 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 Catalytic Converter is used to help control emissions. The PCM (Powertrain Control Module) uses the signal from the oxygen sensor to the rear of the catalyst to monitor the catalyst’s efficiency. This is the bank 1,3 sensor. It’s a four wire sensor being supplied a 0.5 volt reference voltage as well as a power and ground circuit for the o2 sensor heater element. There is also a signal wire from the oxygen sensor to the PCM that can vary between about 0.1 volts to about 0.9 volts according to oxygen content of the exhaust. A properly working post-cat sensor will exhibit small changes at a slower rate than front o2 sensors. To over simplify: a post-cat sensor’s main job is to monitor catalyst efficiency, not control fuel management (although they can have a measure of influence over the front o2 sensor’s operation). If the PCM determines that the post-cat o2 sensor signal voltage is below a certain threshold for too long, P0143 will set. PCM detected the HO2S signal was less than 156 mv for 28 seconds.
codigo-p0143
Código de avería P0144: 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 catalytic converter is used to lower harmful emissions. To ensure proper operation, there is an O2 sensor located behind the catalyst that monitors the oxygen content of the exhaust after the cat. The PCM (Powertrain Control Module) then compares the post-cat reading to the pre-cat readings to determine if the catalyst is working properly. A P0144 refers to a fault at the post-cat o2 sensor, indicating that the signal voltage is too high. The o2 sensor is a four wire sensor. Two wires are dedicated to the heating element and two wires are dedicated to the sensor. The heating element should have battery voltage on one wire with key on engine off and ground should be present on the other. The PCM supplies a reference voltage to the o2 sensor which the sensor varies according to oxygen content in the exhaust. It is capable of varying between approximately 0.1 and 0.9 volts. This variance in the voltage is monitored by the PCM. The PCM also supplies a ground to the sensor. P0144 means that the voltage was too high on the signal circuit.
codigo-p0144
Código de avería P0134: 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. This code refers to the front oxygen sensor on Bank 1. Basically the oxygen sensor is inactive. Here’s why: The powertrain control module (PCM) provides a baseline voltage of about 450 mV on the oxygen sensor signal circuit. When cold, the PCM detects the the internal resistance of the sensor is high. As the sensor warms up the resistance is lowered and it starts producing voltage based on the oxygen content in the exhaust. When the PCM determines that the time it took for the sensor to warm up is greater than one minute or that the voltage is inactive (not reading outside 391-491 mV it views the sensor as inactive or open and sets the P0134 code.
codigo-p0134
Código de avería P0145: This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to all 1996-newer vehicles (Mitsubishi, Nissan, Volkswagen, Inifiniti, etc.). Although generic, the specific repair steps may vary depending on make/model. If your OBD-II equipped vehicle has a stored P0145 code, it means that the powertrain control module (PCM) has detected a slow response time from a downstream (or post catalytic converter) oxygen (O2) sensor or circuit. Bank 1 denotes the bank of the engine that contains the number one cylinder and Sensor 3 indicates that the malfunction is related to the downstream sensor in a system equipped with only three sensors (as opposed to a four-sensor system). O2 sensors are constructed using a zirconium dioxide sensing element which is protected by a vented steel housing. The sensing element is connected to wire leads in the O2 sensor wiring harness using platinum electrodes. The PCM is connected to the O2 sensor wiring harness using the controller area network (CAN). The PCM is supplied with data, pertaining to the percentage of oxygen particles in the engine exhaust as compared to the oxygen content of ambient air, by the O2 sensor. Exhaust gases are pushed into the exhaust pipe and through the catalytic converter; afterward, they pass over the downstream O2 sensor. As exhaust flows through vent holes (in the steel housing) and across the sensing element, ambient air is drawn through the wire lead cavities and into a small chamber in the middle of the sensor. The ambient air (in the chamber) is heated by the exhaust, forcing the oxygen ions to produce (energy) voltage. Deviations between the number of oxygen molecules in ambient air (drawn into the O2 sensor) and the concentration of oxygen ions in the spent exhaust gases cause the voltage to change. These changes cause the oxygen ions inside the O2 sensor to jump between platinum layers very rapidly and repetitiously. Voltage variations occur as the rushing oxygen ions jump between platinum layers. The PCM identifies these variations in voltage as changes in exhaust oxygen concentration. These changes indicate that the engine is either running lean (too little fuel) or rich (too much fuel). The voltage signal from the O2 sensor is low when more oxygen is present in the exhaust (lean condition) and high when less oxygen is present in the exhaust (rich condition). This data is used by the PCM primarily to monitor catalytic converter efficiency. If the downstream O2 sensor circuit fails to cycle as expected, over a set period of time and under certain programmed circumstances, a P0145 code will be stored and a malfunction indicator lamp may be illuminated.
codigo-p0145
Código de avería P0135: 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. This code refers to the front oxygen sensor on Bank 1. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0135.
codigo-p0135
Código de avería P0146: 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 catalytic converter is used to control emissions. The o2 sensor on Bank 1, position 3 is aft of the converter and monitors the catalyst efficiency. The PCM (Powertrain Control Module) does this by comparing the post-cat o2 sensor to the pre-cat o2 sensors. The o2 sensor is a four wire sensor. The PCM supplies a reference to the sensor of about half a volt and also supplies a sensor ground and 12 volts for the heater element. The fourth wire is a ground for the heater element (the heater in the sensor helps the sensor to warm up faster which allows the engine to reach closed loop sooner). The sensor varies the supplied reference voltage based on oxygen content of the exhaust. Oxygen sensors are capable of varying between 0.1 volts to 0.9 volts. Lean exhaust produces low voltage and causes the supplied 0.45 volts to drop. Rich exhaust produces high voltage and causes the supplied 0.45 voltage to increase. Pre-catalyst o2 sensors switch between low and high voltage rapidly. However a post-cat o2 sensor may switch much slower & not vary as much (this is normal). If the sensor doesn’t respond as it should or there are too few switches in a given time period, P0146 may set.
codigo-p0146
Código de avería P0136: 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. Essentially the same as P0137, a P0136 code refers to the second oxygen sensor on Bank 1. The O2 oxygen sensor produces a voltage between 0.1 V and 0.9 V. The ECM monitors O2 sensor voltage and determines if exhaust is lean or rich. O2 sensor voltage is high when exhaust is rich and low when exhaust is lean. The ECM monitors this voltage and increases or decreases fuel injector pulsewidth according to engine fuel/air ratio. If the ECM detects low HO2Sensor voltage for an extended period, it will set P0136 Conditions required to set: HO2 sensor voltage is low for longer than 2 minutes (minutes depend on model of vehicle. Could be up to 4 minutes)
codigo-p0136
Código de avería P0147: 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. O2 (Oxygen) sensors contain a heating element that allows the sensor to reach operating temperature quickly. This lowers emissions since it allows the engine to reach closed loop faster and also allows the engine to stay in closed loop at idle. The heater circuit is supplied a 12 V battery feed from the PCM or ignition circuit (depending on model) and a ground. The PCM (powertrain control module) monitors how long it takes for the sensors to become active after engine start-up. If it takes too long for the o2 sensors to reach operating temperature, this P0147 can set.
codigo-p0147