P1388 Auto Shutdown (ASD) Relay Control Circuit Open Or Shorted

P1388 Auto Shutdown (ASD) Relay Control Circuit Open Or Shorted

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…

P1391 Intermittent Loss of Cmp Or Ckp

P1391 Intermittent Loss of Cmp Or Ckp

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

P1398 Pcm Is Unable To Learn The Crankshaft Position Sensor’S Signal

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…

P1478 Battery Temp Sensor Voltage Out Of Limit

P1478 Battery Temp Sensor Voltage Out Of Limit

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…

P1479 Transmission Fan Relay Circuit Open Or Shorted

P1479 Transmission Fan Relay Circuit Open Or Shorted

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…

P1480 Open Or Shorted Condition Detected In The Positive Crankcase Ventilation

P1480 Open Or Shorted Condition Detected In The Positive Crankcase Ventilation

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…