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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.
Your available vehicle context is included where the destination supports it. AI guidance stays separate from verified IAR source records.
Use controlled pressure on a cool system to investigate leaks without opening a hot, pressurized cooling circuit.
Test-first procedureCompare operating pattern, temperature data, and airflow evidence without applying a universal gauge, infrared, or fan rule.
Test-first procedureSeparate actual tire-pressure loss from sensor detection, compatibility, registration, and receiver concerns without guessing a universal relearn process.
Test-first procedureSeparate vibration caused by brake application from a shake that follows road speed before choosing a brake, wheel, tire, hub, or suspension path.
Test-first procedureCheck whether the vehicle is replenishing electrical energy under its intended operating strategy instead of applying one universal voltage rule.
Test-first procedureSeparate state of charge, battery condition, and connection problems before blaming the starter or alternator.
Test-first procedureInvestigate key-off battery drain only after the vehicle has entered its correct sleep state and the evidence is preserved.
Test-first procedureSeparate start-request, interlock, cable, ground, solenoid, and starter-motor evidence before bypassing the circuit or replacing the starter.
Test-first procedureThe 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 guideThe brake system converts motion into heat and controls wheel deceleration. Noise, vibration, pull, warning lamps, and pedal changes require inspection of the whole system rather than one assumed axle or part.
System guideThe fuel system stores and meters fuel under controlled conditions. A no-start, lean code, odor, or hesitation can involve supply, command, air measurement, electrical control, mechanical condition, or vapor management.
System guideHVAC comfort depends on airflow, heat exchange, temperature control, doors, sensors, and—for air conditioning—a sealed refrigerant system. Warm air alone does not identify a failed compressor.
System guideThe 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 system reached a rich-condition diagnostic threshold for Bank 1. The data does not by itself prove an injector, fuel-pressure, MAF sensor, or oxygen-sensor failure.
Generic codeThe control system reached a rich-condition diagnostic threshold for Bank 2. The data does not by itself prove an injector, fuel-pressure, MAF sensor, or oxygen-sensor 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 generic EVAP monitor detected purge-flow behavior outside its expected strategy. The code does not prove the purge valve itself is failed; the flow path, sealing, sensing, electrical control, and vehicle-specific monitor conditions still have to be tested.
Generic codeThe 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 engine did not reach the expected temperature behavior under the monitor’s conditions. The thermostat is one possibility, not the only one.
Generic codeThe control module detected coolant-temperature sensor behavior outside the expected range or performance relationship. The code does not by itself prove the sensor, wiring, connector, actual engine temperature, or control strategy as the cause.
Generic codeThe control module detected a coolant-temperature sensor circuit signal in a low range for the vehicle’s monitoring strategy. The code does not by itself prove the sensor, wiring, connector, or engine temperature is the cause.
Generic codeThe control module detected a coolant-temperature sensor circuit signal in a high range for the vehicle’s monitoring strategy. The code does not by itself prove the sensor, wiring, connector, or engine temperature is the cause.
Generic codeThe system may be reporting low tire pressure, a sensor/communication problem, or a relearn/registration condition. Measure the tires before diagnosing electronics.
CautionThe vehicle has detected a charging-system or electrical-generation concern. The battery symbol does not by itself prove the battery failed.
Assess promptlyThe engine or cooling system is reporting excessive temperature or a related protection condition. The warning does not identify whether the cause is coolant loss, airflow, circulation, control, or internal leakage.
Stop and assessThe engine or emissions control system has detected a condition that should be investigated. The lamp alone does not identify a failed part.
Assess promptlyThe traction-control, stability-control, or related chassis-control system has reported a fault, has been switched off, or is actively intervening. The lamp alone does not identify a failed sensor or module.
Assess promptlyThe supplemental restraint system has detected a fault or is not fully available. A lamp is not a reason to probe connectors or install a used restraint component.
CautionAn EVAP code identifies a monitored vapor-control condition, but the useful next test depends on whether the evidence points to a leak/sealing fault, purge-flow fault, electrical circuit fault, or an incomplete monitor.
intermediateTreat active hot coolant loss as a burn and overheating hazard, then inspect the cooled system to separate external leakage, cap/sealing concerns, trapped air, and possible internal loss.
intermediateTreat overheating as a stop-and-assess condition, then separate coolant loss, airflow, circulation, control, and combustion concerns.
professional recommendedCabin heat complaints can come from engine temperature, coolant level/circulation, airflow, blend-door/control operation, or an electric heat source on some vehicles.
intermediateIAR does not passively record this search. Save feedback only if you want a local note that you can export later for editorial planning. VIN-like vehicle identifiers are redacted before local save.