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Learn what P0728 means and how to diagnose engine coolant temperature sensor circuit faults P0728 Overview Code P0728 Code Type P Code Class P0 System Transmission Severity Level High Emissions Related true Drivability Impact Major Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0728 indicates a malfunction in the engine coolant temperature sensor circuit Symptoms Overheating Poor engine performance Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products Engine coolant temperature sensor Possible Causes Faulty coolant temperature sensor Wiring issues Diagnostic Steps 1 Inspect coolant temperature sensor2 Test sensor output Drive Safety Notes Malfunctioning coolant sensors can cause engine overheating

Learn what P0887 means and how to diagnose issues with the transmission control module power supply P0887 Overview Code P0887 Code Type P Code Class P0 System Transmission Severity Level High Emissions Related true Drivability Impact Major Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0887 indicates a malfunction in the transmission control module (TCM) power supply circuit Symptoms Transmission stalling Erratic shifting Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products Transmission control module (TCM) Possible Causes Faulty TCM Wiring issues Faulty relay or fuse Diagnostic Steps 1 Inspect TCM power supply2 Check wiring and relay Drive Safety Notes A malfunctioning TCM power supply can cause erratic shifting, stalling, and loss of power

Learn what P0339 means, symptoms, causes, and diagnostic steps for an intermittent crankshaft position sensor signal P0339 Overview Code P0339 Code Type P Code Class P0 System Engine Severity Level High Emissions Related true Drivability Impact Major Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0339 indicates an intermittent signal from the crankshaft position sensor circuit Symptoms Intermittent stalling; Engine hesitation Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products Intermittent crankshaft data causes unstable ignition timing Possible Causes Loose wiring or connectors; Failing crankshaft sensor Diagnostic Steps 1 Scan for intermittent faults; 2 Perform wiggle test on wiring; 3 Monitor live RPM signal Drive Safety Notes Sudden stalling may pose safety risks Prompt repair is required

Learn what P0109 means, including symptoms, causes, and diagnostic steps for an intermittent MAP sensor signal P0109 Overview Code P0109 Code Type P Code Class P0 System Engine Severity Level Medium Emissions Related true Drivability Impact Major Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0109 indicates an intermittent or erratic signal from the MAP sensor circuit detected by the ECM Symptoms Intermittent Check Engine Light; Hesitation or surging; Engine stalling; Rough idle Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products Intermittent MAP sensor signals disrupt engine load calculations and drivability Possible Causes Loose or damaged wiring/connectors; Faulty MAP sensor; Vibration-related electrical issues Diagnostic Steps 1 Scan for intermittent codes; 2 Inspect MAP wiring and connectors; 3 Perform a wiggle test while monitoring live data; 4 Inspect vacuum hoses; 5 Replace the MAP sensor if intermittent faults persist Drive Safety Notes Intermittent stalling can pose safety risks Repair is recommended as soon as possible

Learn what P0447 means and how to diagnose EVAP vent circuit open issues P0447 Overview Code P0447 Code Type P Code Class P0 System Engine, Emissions Severity Level Low Emissions Related true Drivability Impact None Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0447 indicates an open circuit in the EVAP vent control valve Symptoms Check Engine Light illuminated Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products EVAP vent valve circuit Possible Causes Open wiring; Faulty vent valve Diagnostic Steps 1 Test vent valve circuit; 2 Repair wiring; 3 Replace vent valve if needed Drive Safety Notes EVAP self-test may fail

Learn what B0020 means and how to diagnose driver airbag circuit faults B0020 Overview Code B0020 Code Type B Code Class B0 System Airbag Severity Level High Emissions Related false Drivability Impact None Diagnostic Protocol CAN Freeze Frame Useful false Code Definition Diagnostic trouble code B0020 indicates a fault in the driver frontal airbag deployment loop Symptoms Airbag warning light Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products Supplemental restraint system Possible Causes Clock spring fault Diagnostic Steps 1 Inspect clock spring 2 Check deployment circuit Drive Safety Notes Airbag may not deploy

Learn what P0710 means and how to diagnose transmission fluid temperature sensor circuit faults P0710 Overview Code P0710 Code Type P Code Class P0 System Transmission Severity Level High Emissions Related true Drivability Impact Major Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0710 indicates a malfunction in the transmission fluid temperature sensor circuit Symptoms Poor acceleration Overheating Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products Transmission fluid temperature sensor Possible Causes Faulty transmission fluid temperature sensor Wiring issues Diagnostic Steps 1 Inspect transmission fluid temperature sensor 2 Test sensor circuit Drive Safety Notes Overheating can cause transmission failure

Learn what P2118 means and how to diagnose throttle actuator motor current faults P2118 Overview Code P2118 Code Type P Code Class P0 System Engine Severity Level High Emissions Related false Drivability Impact Major Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P2118 indicates a throttle actuator control motor current range issue Symptoms Reduced power Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products Throttle motor monitoring Possible Causes Excessive motor resistance Diagnostic Steps 1 Measure motor current; 2 Inspect throttle body Drive Safety Notes Throttle response reduced

Learn what P0651 means and how to diagnose EGR sensor circuit malfunctions P0651 Overview Code P0651 Code Type P Code Class P0 System Engine Severity Level High Emissions Related true Drivability Impact Major Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0651 indicates a malfunction in the exhaust gas recirculation (EGR) sensor circuit Symptoms Engine stalling; Check Engine Light Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products Exhaust Gas Recirculation (EGR) Possible Causes Faulty EGR sensor; Clogged EGR valve Diagnostic Steps 1 Inspect EGR sensor 2 Test EGR valve function Drive Safety Notes EGR system malfunction could lead to increased emissions

Learn what C0121 means and how to diagnose ABS valve relay circuit faults C0121 Overview Code C0121 Code Type C Code Class C0 System ABS Severity Level Medium Emissions Related false Drivability Impact Minor Diagnostic Protocol CAN Freeze Frame Useful false Code Definition Diagnostic trouble code C0121 indicates a fault in the ABS valve relay circuit Symptoms ABS warning light Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products ABS hydraulic control Possible Causes Relay failure Diagnostic Steps 1 Inspect relay 2 Test circuit continuity Drive Safety Notes ABS disabled

Learn what P0824 means and how to diagnose clutch position sensor circuit malfunctions P0824 Overview Code P0824 Code Type P Code Class P0 System Transmission Severity Level High Emissions Related true Drivability Impact Major Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0824 indicates a malfunction in the clutch position sensor circuit Symptoms Poor shifting Transmission slippage Overview applies to this diagnostic code. Affected Systems On This Page Code Definition Symptoms Affected Systems Possible Causes Diagnostic Steps Drive Safety Notes More Resources Diagnostic Trouble Codes Diagnostic Q&A Automotive Knowledge Base All Diagnostic Products Clutch position sensor circuit Possible Causes Faulty clutch position sensor Wiring issues Diagnostic Steps 1 Inspect clutch position sensor2 Test sensor circuit Drive Safety Notes A malfunctioning clutch position sensor can lead to slipping and poor acceleration