Possible causes – Electronic Throttle Control System (ETCS).– Air induction system– PCV hose connection Tech notes Before replacing any parts, try adjust engine idle first. When is the code detected? The Engine Control Module (ECM) regulates the idle speed by

Possible causes – Electronic Throttle Control System (ETCS).– Air induction system– PCV hose connection Tech notes The is a factory service bulletin for the following Toyota vehicles: 2005 and 2009 Toyota Avalon2007 and 2010 Toyota Camry2008 and 2009 Toyota Highlander2006

Possible causes – Engine Control Module (ECM) may be faulty– ECM harness power supply circuit is open or shorted– ECM harness ground circuit is open or shorted Tech notes Check the ECM fuse, if fuse is OK try erasing the

Possible causes – Engine Control Module (ECM) Programming error– Vehicle Identification Number (VIN) not programmed to ECM– Faulty or wrong ECM Tech notes If a new ECM is installed in a vehicle, the Vehicle Identification Number (VIN) has to be

Possible causes – Faulty Air Pump inoperative– Air bypass solenoid harness is open or shorted– Air bypass solenoid circuit poor electrical connection Tech notes There is a factory service bulletin for the following Toyota models: 2005-2007 Toyota Sequoia2005

Possible causes – Faulty Air Pump inoperative– Air bypass solenoid harness is open or shorted– Air bypass solenoid circuit poor electrical connection When is the code detected? The DTC P0412 is detected the the AIR vacuum control solenoid circuit not

Possible causes – Faulty Air Pump inoperative– Air bypass solenoid harness is open or shorted– Air bypass solenoid circuit poor electrical connection When is the code detected? The DTC P0415 is detected the the AIR vacuum control solenoid circuit not

Possible causes – Faulty Air Pump inoperative– Air bypass solenoid harness is open or shorted– Air bypass solenoid circuit poor electrical connection When is the code detected? The DTC P0419 is detected the the AIR vacuum control solenoid circuit not

Possible causes – Faulty Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1– Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 harness is open shorted to ground– Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit poor electrical connection– Air-Fuel Ratio

Possible causes – Faulty Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1– Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 harness is open shorted to ground– Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit poor electrical connection– Air-Fuel Ratio

Possible causes – Faulty Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1– Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 harness is open shorted to ground– Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 circuit poor electrical connection– Air-Fuel Ratio

Possible causes – Faulty Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1– Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 harness is open shorted to ground– Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 circuit poor electrical connection– Faulty Engine

Possible causes – Faulty Battery Temperature Sensor– Battery Temperature Sensor harness is open or shorted– Battery Temperature Sensor circuit poor electrical connection When is the code detected? Battery temperature sensor output value is 0.2 V or less for 0.5 seconds

Possible causes – Faulty Battery Temperature Sensor– Battery Temperature Sensor harness is open or shorted– Battery Temperature Sensor circuit poor electrical connection When is the code detected? Battery temperature sensor output value is 4.8 V or more for 0.5 seconds

Possible causes – Faulty Brake Switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection When is the code detected? The P0573 codes is set when the stop light switch signal is too high. Symptoms –

Possible causes – Faulty Brake Switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection– Misadjusted Brake Switch When is the code detected? The stop light switch does not turn off even once vehicle is driven.

Possible causes – Faulty Brake Switch– Misadjusted brake switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection When is the code detected? The P0571 codes is set when the stop light switch does not turn

Possible causes – Faulty Brake Switch– Misadjusted brake switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection When is the code detected? The P0572 codes is set when the stop light switch signal is too

Possible causes – Faulty Camshaft Position Sensor– Camshaft Position Sensor harness is open or shorted– Camshaft Position Sensor circuit poor electrical connection– Faulty starter motor– Starting system circuit– Dead (Weak) battery Tech notes Sometimes and in some models, low battery

Possible causes – Faulty Camshaft Position Sensor– Camshaft Position Sensor harness is open or shorted– Camshaft Position Sensor circuit poor electrical connection– Faulty starter motor– Starting system circuit– Dead (Weak) battery Tech notes Sometimes and in some models, low battery