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Results are grouped by useful content—not by paid placement or guessed parts. Describe the symptom naturally; IAR recognizes common alternate wording while keeping exact codes and vehicle details precise.
Select a vehicle when you want more relevant guidance. AI guidance stays separate from verified IAR source records.
Locate and classify an oil leak, check the immediate safety clues, and separate a visible external leak from oil consumption or another fluid.
General guidanceClassify smoke or a burning smell by location, color, timing, and nearby systems before attempting another drive or touching a hot component.
intermediateAn oil-pressure warning can represent actual lubrication-pressure loss or an electrical/sensor reporting fault. Because real pressure loss can damage an engine quickly, operation safety comes before diagnosis.
professional recommendedClassify an engine noise by when it occurs, where it is heard, and what warnings or operating changes accompany it before choosing a safe inspection path.
professional recommendedTreat gasoline or diesel odor as a safety signal first, then separate a liquid leak, vapor-system concern, refueling spill, exhaust odor, and cabin-source issue without running the vehicle beside an active leak.
professional recommendedThe engine turns stored fuel energy into controlled torque. Good diagnosis separates a combustion problem from a mechanical, control, mounting, or support-system problem before parts are removed.
System guideThe cooling system moves heat away from the engine and releases it through controlled coolant flow and airflow. Overheating demands immediate safety judgment before diagnosis.
System guideEmissions systems control combustion byproducts and fuel vapor while monitoring performance. A code reports what a monitor detected; it does not automatically name the part that caused the result.
System guideUse the exact oil specification, quantity, filter, interval, and reset procedure for the vehicle.
Verify vehicle intervalA safety-first overview of an oil and filter service with strict boundaries around support, oil specification, capacity, drain hardware, and level verification.
intermediateA clean general workflow for inspecting and replacing a serviceable engine air filter without introducing debris or creating an intake leak.
beginnerThe EVAP monitor detected a small-leak or sealing condition. The code does not identify the physical leak location or prove which component failed.
Generic codeThe EVAP monitor detected a very small leak or inability to maintain the expected seal. The code does not identify the leak location or prove a specific valve, cap, hose, or canister failed.
Generic codeThe EVAP monitor detected a large-leak or inability-to-seal condition. It does not identify where the leak or control fault is located.
Generic codeThe control system reached a lean-condition diagnostic threshold for Bank 1. The data does not by itself prove a vacuum leak, MAF sensor, or fuel pump.
Generic codeThe control system reached a lean-condition diagnostic threshold for Bank 2. The data does not by itself prove a vacuum leak, MAF sensor, oxygen sensor, or fuel-delivery failure.
Generic codeThe generic EVAP monitor reported a system-level malfunction. The code identifies the monitored emissions system, not a failed cap, valve, hose, canister, sensor, or other specific part.
Generic codeThe catalyst monitor determined that Bank 1 oxygen-storage performance was below its calibrated threshold. The code alone does not prove the converter is the original cause.
Generic codeThe catalyst monitor determined that Bank 2 oxygen-storage performance was below its calibrated threshold. The code alone does not prove the converter is the original cause.
Generic codeThe generic DTC identifies a vent-control circuit malfunction. It does not identify whether the fault is the vent device, wiring, connector, power/ground, control driver, or another exact-vehicle circuit condition.
Generic codeThe generic DTC identifies a malfunction in the EVAP vent valve or solenoid control circuit. It is a circuit-level finding, not proof that the vent valve or solenoid should be replaced.
Generic codeThe control module detected cooling-system temperature behavior outside its expected performance range. The code does not by itself identify a thermostat, coolant-temperature sensor, fan, coolant level, radiator, water pump, or other failed part.
Generic codeThe control module detected a malfunction in the mass-or-volume-air-flow circuit. The code does not by itself identify the sensor, wiring, intake path, power/ground, or control module as the cause.
Generic codeThe measured or modeled airflow was outside the expected relationship. The code does not automatically mean the MAF sensor itself failed.
Generic codeThe control module detected a mass-or-volume-air-flow circuit signal in a low range for its monitoring strategy. The code does not by itself prove a MAF sensor, wiring, connector, intake path, power/ground, or control module is the cause.
Generic codeThe control module detected a mass-or-volume-air-flow circuit signal in a high range for its monitoring strategy. The code does not by itself prove a MAF sensor, wiring, connector, intake path, power/ground, or control module is the cause.
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