The P1388 Auto Shutdown (ASD) Relay Control Circuit is responsible for controlling the power supply to the vehicle’s ignition system. When this circuit has an open or shorted condition, it can cause a variety of problems such as engine stalling, no-start conditions, and erratic performance. The ASD relay control circuit consists of several components including…
P1390 timing belt skipped one tooth or more is a common fault code for most vehicles. It occurs when the engine’s timing belt skips over one or more teeth on its sprocket, resulting in misalignment of the camshaft and crankshaft. This can cause damage to engine components such as valves, pistons, and rings if not…
P1391 is a diagnostic trouble code (DTC) that indicates an intermittent loss of the crankshaft position sensor signal or camshaft position sensor signal. This DTC is common in vehicles with distributor-less ignition systems and can be caused by several factors including a faulty crank/camshaft position sensor, bad wiring, or dirty connections. It’s important to diagnose…
P1398 PCM is unable to learn the crankshaft position sensor’s signal due to various reasons. One of the most common causes for this error code is a faulty or malfunctioning crankshaft position sensor (CPS). The CPS sends a signal to the powertrain control module (PCM) indicating the exact location of each cylinder in its firing…
If the P1399 Wait to Start Lamp Circuit is open or shorted, it means that there is a problem with the circuit. This usually occurs when one of the wires in either the power or ground circuits has become damaged, corroded, disconnected, or otherwise not functioning correctly. If this happens, then trouble codes will be…
The P1403 code indicates that there is a loss of 5 volts to the Exhaust Gas Recirculation (EGR) sensor. This usually means that either the EGR circuit has an open or short, or the wiring between the EGR sensor and ECU has become damaged. To fix this issue, you will need to inspect all of…
Auxiliary 5 Volt Output Too High (P1475) is an OBD-II code that indicates that the voltage of the engine’s auxiliary 5V output has exceeded its predetermined limit. This could be caused by a faulty powertrain control module (PCM), a malfunctioning alternator, or a short in wiring or connectors. Once these have been checked, you can…
Too little secondary air is a fault code that can be detected in the OBD-II system of vehicles. This code indicates that there is not enough air being supplied to the engine’s combustion chamber, resulting in incomplete fuel burning and an increase in emissions. The most common cause of this fault code is an issue…
P1478 Battery Temp Sensor Voltage Out Of Limit is a diagnostic trouble code (DTC) for the vehicle’s powertrain control module. This DTC indicates that the temperature reading from the battery temperature sensor has exceeded its normal range or is outside of what is expected by the PCM (Powertrain Control Module). The voltage output from this…
A P1479 Transmission Fan Relay Circuit Open or Shorted indicates a fault in the transmission fan relay circuit. The most common causes of this code are an open or shorted condition in the transmission fan relay, wiring issues such as poor connection, corrosion, and/or damaged wires, or faulty relays within the system. Other potential causes…
The P1480 PCV Solenoid Valve is an electrical device that controls the flow of air into and out of the Positive Crankcase Ventilation (PCV) system on a car. It is normally open when the engine is running, but closes when certain conditions are met. When it fails, either because it has become shorted or open,…
P1480 is a diagnostic trouble code (DTC) that indicates an issue with the positive crankcase ventilation (PCV) system. It means that either an open or shorted condition has been detected in the PCV system. The PCV system is responsible for controlling and regulating the pressure inside of the engine’s crankcase, thus ensuring proper air-fuel mixture…