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Learn what P0404 means, symptoms, causes, and diagnostic steps for EGR position sensor performance issues P0404 Overview Code P0404 Code Type P Code Class P0 System Engine, Emissions Severity Level Medium Emissions Related true Drivability Impact Minor Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0404 indicates an EGR position sensor range or performance problem Symptoms Check Engine Light illuminated; Poor fuel economy; 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 EGR valve position monitoring and emissions control Possible Causes Faulty EGR valve position sensor; Carbon buildup; EGR valve sticking Diagnostic Steps 1 Monitor EGR position data via scan tool; 2 Inspect EGR valve for carbon buildup; 3 Clean or replace EGR valve; 4 Test sensor wiring Drive Safety Notes Driving is safe but emissions may increase

Learn what P0699 means and how to diagnose mass air flow sensor circuit malfunctions P0699 Overview Code P0699 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 P0699 indicates a malfunction in the mass air flow sensor circuit Symptoms Rough idle Poor fuel economy 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 Mass air flow sensor Possible Causes Faulty MAF sensor Clogged air filter Diagnostic Steps 1 Inspect MAF sensor 2 Test sensor output Drive Safety Notes Poor MAF sensor performance can cause increased fuel consumption

Learn what P0730 means and how to diagnose incorrect gear ratio issues P0730 Overview Code P0730 Code Type P Code Class P0 System Transmission Severity Level High Emissions Related false Drivability Impact Major Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0730 indicates an incorrect gear ratio detected Symptoms Slipping transmission 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 Gear ratio monitoring Possible Causes Internal transmission wear Diagnostic Steps 1 Compare input/output speeds 2 Inspect transmission fluid Drive Safety Notes Transmission damage possible

Learn what P0607 means and how to diagnose ECM internal circuit malfunctions P0607 Overview Code P0607 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 P0607 indicates a problem with the ECM’s internal circuit Symptoms Check Engine Light; Engine misfire 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 Control Module (ECM) Possible Causes Faulty internal ECM circuit; Corrupted data in ECM Diagnostic Steps 1 Inspect ECM for internal faults 2 Perform ECM reset Drive Safety Notes Potential for engine control issues

Learn what P0871 means and how to diagnose transmission fluid pressure sensor performance malfunctions P0871 Overview Code P0871 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 P0871 indicates a malfunction in the transmission fluid pressure sensor performance Symptoms Harsh shifting Transmission failure 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 pressure sensor Possible Causes Faulty fluid pressure sensor Wiring issues Diagnostic Steps 1 Inspect fluid pressure sensor2 Test sensor performance Drive Safety Notes A malfunctioning fluid pressure sensor can cause poor shifting and overheating of the transmission

Learn what P0647 means and how to diagnose intake air temperature sensor circuit malfunctions P0647 Overview Code P0647 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 P0647 indicates a malfunction in the intake air temperature sensor circuit Symptoms Poor engine performance; 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 Intake air temperature sensor Possible Causes Faulty intake air temperature sensor; Wiring issues Diagnostic Steps 1 Inspect intake air temperature sensor 2 Test sensor output Drive Safety Notes Improper air intake can affect engine efficiency

P0152 code explained Learn symptoms, causes, and diagnostic steps for a high oxygen sensor voltage condition P0152 Overview Code P0152 Code Type P Code Class P0 System Engine, Emissions Severity Level Medium Emissions Related true Drivability Impact Minor Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0152 indicates high voltage in the oxygen sensor circuit for Bank 2 Sensor 1 Symptoms Check Engine Light illuminated; Poor fuel economy 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 High O2 sensor voltage may indicate rich fuel conditions or sensor failure Possible Causes Faulty oxygen sensor; Wiring short to voltage Diagnostic Steps 1 Confirm the code; 2 Inspect wiring for shorts; 3 Monitor O2 voltage; 4 Replace the oxygen sensor if required Drive Safety Notes Driving is possible but emissions may increase

Learn what P0113 means, common symptoms, causes, and diagnostic steps for a high intake air temperature sensor signal P0113 Overview Code P0113 Code Type P Code Class P0 System Engine Severity Level Low Emissions Related true Drivability Impact Minor Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0113 indicates that the intake air temperature sensor signal is higher than the normal operating range detected by the ECM Symptoms Check Engine Light illuminated; Reduced engine performance; Poor fuel economy 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 High IAT readings can result in incorrect air-fuel mixture calculations Possible Causes Faulty IAT sensor; Open circuit in wiring; Loose electrical connections Diagnostic Steps 1 Confirm the code using a scan tool; 2 Inspect wiring for open circuits; 3 Monitor live IAT data; 4 Compare readings to ambient temperature; 5 Replace the sensor if values are abnormally high Drive Safety Notes Driving is generally safe, but diagnosis is recommended to maintain proper engine operation

Learn what P0205 means and how to diagnose cylinder 5 fuel injector circuit faults P0205 Overview Code P0205 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 P0205 indicates a malfunction in the fuel injector circuit for cylinder 5 Symptoms Engine misfire; Rough idle; 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 Cylinder 5 fuel delivery and combustion Possible Causes Faulty fuel injector; Wiring issues; ECM driver fault Diagnostic Steps 1 Swap injector with another cylinder; 2 Monitor misfire data; 3 Test injector resistance; 4 Inspect wiring harness Drive Safety Notes Continued misfire may damage catalytic converter

Learn what U0293 means and how to diagnose hybrid control module communication faults U0293 Overview Code U0293 Code Type U Code Class U0 System Network Severity Level High Emissions Related false Drivability Impact Major Diagnostic Protocol CAN Freeze Frame Useful false Code Definition Diagnostic trouble code U0293 indicates lost communication with the hybrid powertrain control module Symptoms Hybrid system warning 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 Hybrid system communication network Possible Causes Hybrid module offline Diagnostic Steps 1 Verify module power supply 2 Inspect CAN communication Drive Safety Notes Hybrid system may be disabled

Learn what P0521 means and how to diagnose oil pressure sensor performance issues P0521 Overview Code P0521 Code Type P Code Class P0 System Engine Severity Level Medium Emissions Related false Drivability Impact Minor Diagnostic Protocol OBD2 Freeze Frame Useful true Code Definition Diagnostic trouble code P0521 indicates an engine oil pressure sensor range or performance issue Symptoms Intermittent oil warning light; 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 Oil pressure plausibility monitoring Possible Causes Sensor drift; Wiring issues Diagnostic Steps 1 Compare sensor reading to mechanical gauge; 2 Inspect wiring; 3 Replace sensor if inaccurate Drive Safety Notes Incorrect oil pressure readings may mislead driver