Category: OBDii Powertrain Codes

P0386 Crankshaft Position Sensor B Circuit Range/Performance Possible causes – Faulty crankshaft position sensor– Crankshaft position sensor harness is open or shorted– Crankshaft position sensor circuit poor electrical connection– Signal plate may be damage– Starter motor may be faulty– Starting system circuit– Dead or weak battery Tech description Sometimes and in some models, low battery…

P0387 Crankshaft Position Sensor B Circuit Low Input Possible causes – Faulty crankshaft position sensor– Crankshaft position sensor harness is open or shorted– Crankshaft position sensor circuit poor electrical connection– Signal plate may be damage– Starter motor may be faulty– Starting system circuit– Dead or weak battery Tech description Sometimes and in some models, low…

P0388 Crankshaft Position Sensor B Circuit High Input Possible causes – Faulty crankshaft position sensor– Crankshaft position sensor harness is open or shorted– Crankshaft position sensor circuit poor electrical connection– Signal plate may be damage– Starter motor may be faulty– Starting system circuit– Dead or weak battery Tech description Sometimes and in some models, low…

P0389 Crankshaft Position Sensor B Circuit Intermittent Possible causes – Faulty crankshaft position sensor– Crankshaft position sensor harness is open or shorted– Crankshaft position sensor circuit poor electrical connection– Signal plate may be damage– Starter motor may be faulty– Starting system circuit– Dead or weak battery Tech description Sometimes and in some models, low battery…

P0390 Camshaft Position Sensor B Circuit Bank 2 Possible causes – Faulty Camshaft Position Sensor– Camshaft Position Sensor harness is open or shorted– Camshaft Position Sensor circuit poor electrical connection– Faulty starter motor– Starting system circuit– Dead (Weak) battery Tech description Sometimes and in some models, low battery voltage or a weak starter can can…

P0380 Glow Plug/Heater Circuit A Malfunction Possible causes – Faulty Glow Plug– Glow Plug harness is open or shorted– Glow Plug circuit poor electrical connection What about the obd code? – The glow plugs are commanded OFF and the glow plug feedback is more than 2 volts. or– The glow plugs are commanded on and…

P0381 Glow Plug/Heater Indicator Circuit Malfunction Possible causes – Faulty Glow Plug– Glow Plug harness is open or shorted– Glow Plug circuit poor electrical connection What about the obd code? – The glow plugs are commanded OFF and the glow plug feedback is more than 2 volts. or– The glow plugs are commanded on and…

P0382 Glow Plug/Heater Circuit B Malfunction Possible causes – Faulty Glow Plug– Glow Plug harness is open or shorted– Glow Plug circuit poor electrical connection What about the obd code? – The glow plugs are commanded OFF and the glow plug feedback is more than 2 volts. or– The glow plugs are commanded on and…

P0383 Glow Plug Control Module Circuit Low Possible causes – Faulty Glow Plug– Glow Plug harness is open or shorted– Glow Plug circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– The engine may be harder to start P0383 Description The glow plug system is used to assist in…

P0369 Camshaft Position Sensor B Circuit Intermittent Possible causes – Faulty Camshaft Position Sensor– Camshaft Position Sensor harness is open or shorted– Camshaft Position Sensor circuit poor electrical connection– Faulty starter motor– Starting system circuit– Dead (Weak) battery What about the obd code? The camshaft position sensor signal sent to the Engine Control Module(ECM) is…

P0370 Timing Reference High Resolution Signal A Malfunction Possible causes – Timing Reference Optical Sensor harness is open or shorted– Timing Reference Optical Sensor circuit poor electrical connection– Faulty Timing Reference Optical Sensor– Damaged Powertrain Control Module (PCM) What about the obd code? A number of high resolution pulses missing per every 8 cam reference…

P0371 Timing Reference High Resolution Signal A Too Many Pulses Possible causes – Timing Reference Optical Sensor harness is open or shorted– Timing Reference Optical Sensor circuit poor electrical connection– Faulty Timing Reference Optical Sensor– Damaged Powertrain Control Module (PCM) What about the obd code? There are too many high resolution pulses from the optical…

P0372 Timing Reference High Resolution Signal A Too Few Pulses Possible causes – Timing Reference Optical Sensor harness is open or shorted– Timing Reference Optical Sensor circuit poor electrical connection– Faulty Timing Reference Optical Sensor– Damaged Powertrain Control Module (PCM) What about the obd code? Some high resolution pulses are missing from the optical sensor…

P0373 Timing Reference High Resolution Signal A Intermittent/Erratic Pulses Possible causes – Timing Reference Optical Sensor harness is open or shorted– Timing Reference Optical Sensor circuit poor electrical connection– Faulty Timing Reference Optical Sensor– Damaged Powertrain Control Module (PCM) What about the obd code? Some high resolution pulses are intermittent from the optical sensor to…

P0374 Timing Reference High Resolution Signal A No Pulses Possible causes – Timing Reference Optical Sensor harness is open or shorted– Timing Reference Optical Sensor circuit poor electrical connection– Faulty Timing Reference Optical Sensor– Damaged Powertrain Control Module (PCM) What about the obd code? There are no high resolution pulses from the optical sensor to…

P0375 Timing Reference High Resolution Signal B Malfunction Possible causes – Timing Reference Optical Sensor harness is open or shorted– Timing Reference Optical Sensor circuit poor electrical connection– Faulty Timing Reference Optical Sensor– Damaged Powertrain Control Module (PCM) What about the obd code? Some high resolution pulses are missing from the optical sensor to the…

P0376 Timing Reference High Resolution Signal B Too Many Pulses Possible causes – Timing Reference Optical Sensor harness is open or shorted– Timing Reference Optical Sensor circuit poor electrical connection– Faulty Timing Reference Optical Sensor– Damaged Powertrain Control Module (PCM) What about the obd code? There are too many high resolution pulses from the optical…

P0377 Timing Reference High Resolution Signal B Too Few Pulses Possible causes – Timing Reference Optical Sensor harness is open or shorted– Timing Reference Optical Sensor circuit poor electrical connection– Faulty Timing Reference Optical Sensor– Damaged Powertrain Control Module (PCM) What about the obd code? Some high resolution pulses are missing from the optical sensor…

P0378 Timing Reference High Resolution Signal B Intermittent/Erratic Pulses Possible causes – Timing Reference Optical Sensor harness is open or shorted– Timing Reference Optical Sensor circuit poor electrical connection– Faulty Timing Reference Optical Sensor– Damaged Powertrain Control Module (PCM) What about the obd code? Some high resolution pulses are intermittent from the optical sensor to…

P0379 Timing Reference High Resolution Signal B No Pulses Possible causes – Timing Reference Optical Sensor harness is open or shorted– Timing Reference Optical Sensor circuit poor electrical connection– Faulty Timing Reference Optical Sensor– Damaged Powertrain Control Module (PCM) What about the obd code? There are no high resolution pulses from the optical sensor to…