After the engine is warmed up, the ECM performs air fuel ratio feedback control to maintain the air fuel ratio at the stoichiometric level. In addition, active air fuel control is performed for approximately 15 to 20 seconds after preconditions are met in order to measure the air fuel ratio sensor response rate. During active air fuel control, the ECM forcibly increases and decreases the injection volume a certain amount, based on the stoichiometric air fuel ratio learned during normal air fuel ratio control, and measures the air fuel ratio sensor response rate

DTC P261B Engine Coolant Pump "B" Control Malfunction DTC P261C Engine Coolant Pump "B" Control Circuit Low DTC P261D Engine Coolant Pump "B" Control Circuit High Description Monitor description Monitor strategy Confirmation driving pattern Wiring diagram Inspection procedure Perform active test using intelligent tester (activate the electric water pump) Check harness and connector (engine water pump assembly - ecm) Check ecm (wpi voltage) Check engine water pump assembly (power source) Check harness and connector (engine water pump assembly - body ground) Check harness and connector (engine water pump assembly - ecm) Replace engine water pump assembly Check whether dtc output recurs (dtc p261b, p261c or p261d) Inspect eng w/p relay Check harness and connector (eng w/p relay - engine water pump assembly) Check eng w/p relay (power source) Check harness and connector (eng w/p relay - body ground)

DTC P2610 ECM / PCM Internal Engine Off Timer Performance Description Monitor description Monitor strategy Confirmation driving pattern Inspection procedure Replace ecm Check whether dtc output recurs

These DTCs are output when there is an open or short in the air fuel ratio sensor circuit, or if air fuel ratio sensor output drops. To detect these problems, the voltage of the air fuel ratio sensor is monitored when turning the power switch on (IG), and the admittance (admittance is an electrical term that indicates the ease of flow of current) is checked while driving. If the voltage of the air fuel ratio sensor is between 0.5 V and 4.5 V, it is considered normal. If the voltage is outside of the specified range, or the admittance is below the standard value, the ECM will determine that there is a malfunction in the air fuel ratio sensor.

DTC P2195 Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1) DTC P2196 Oxygen (A/F) Sensor Signal Stuck Rich (Bank 1 Sensor 1) Description Monitor description Monitor strategy Typical enabling conditions Typical malfunction thresholds Confirmation driving pattern Wiring diagram Inspection procedure Check any other dtcs output (in addition to p2195 or p2196) Confirm if vehicle has run out of fuel in past Perform confirmation driving pattern Read value using intelligent tester (air fuel ratio sensor current) Perform active test using intelligent tester (control the injection volume) Check intake system Check for exhaust gas leak Check fuel pressure Inspect fuel injector assembly Replace air fuel ratio sensor Perform confirmation driving pattern Perform active test using intelligent tester (control the egr step position) Inspect egr valve assembly Replace ecm Confirm whether malfunction has been successfully repaired Replace air fuel ratio sensor Perform confirmation driving pattern Check fuel line

The electronic throttle control system is composed of the throttle actuator, throttle position sensor, accelerator pedal position sensor, and ECM. The ECM operates the throttle actuator to regulate the throttle valve in response to driver inputs. The throttle position sensor detects the opening angle of the throttle valve, and provides the ECM with feedback so that the throttle valve can be appropriately controlled by the ECM.

DTC P2118 Throttle Actuator Control Motor Current Range / Performance Description Monitor description Monitor strategy Typical enabling conditions Typical malfunction thresholds Component operating range Confirmation driving pattern Fail-safe Wiring diagram Inspection procedure Read value using intelligent tester (+bm voltage) Check harness and connector (ecm - auxiliary battery, body ground)

DTC P2111 Throttle Actuator Control System - Stuck Open DTC P2112 Throttle Actuator Control System - Stuck Closed Description Monitor description Monitor strategy Typical enabling conditions Typical malfunction thresholds Confirmation driving pattern FAIL-SAFE Wiring diagram Inspection procedure Check any other dtcs output (in addition to dtc p2111 or p2112) Inspect throttle body assembly (visually check throttle valve) Read value using intelligent tester (throttle position) Replace throttle body assembly Check whether dtc output recurs (dtc p2111 or p2112)

DTC P2102 Throttle Actuator Control Motor Circuit Low DTC P2103 Throttle Actuator Control Motor Circuit High Description Monitor description Monitor strategy Confirmation driving pattern FAIL-SAFE Wiring diagram Inspection procedure Inspect throttle body assembly (resistance of throttle actuator) Check harness and connector (throttle body assembly - ecm) Inspect throttle body assembly (visually check throttle valve) Inspect throttle body assembly (throttle valve)

DTC P148F Engine Coolant Pump Over Revolution Description Inspection procedure Check any other dtcs output (in addition to p148f) Check radiator reservoir tank assembly (engine coolant level) Check for coolant leaks Add engine coolant Repair or replace malfunctioning parts, component and area Clear dtc Inspect engine water pump assembly Replace engine water pump assembly Add engine coolant Confirm whether malfunction has been successfully repaired