Here is a listing of the OBD-I / VSS trouble codes (and the fail-safe operation the ECU resorts to when the code is thrown); if there is more info on the code, the code number will link to a section on the lower page. The reason "limp mode" has become "unbypassable" is due to the existing codes. Limp mode reduces engine output, limits the RPMs and speed, prevents the transmission from shifting gears. Subaru Diagnosis & Trouble shooting “We’ll diagnose & fix any Subaru problem!” Modern Subaru cars have evolved complex electrical management systems and are highly technical. P1507 Idle Control System Malfunction (Fail Safe) P1510 Idle Air Control Solenoid Signal 1 Circuit Low Input. Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. Incorrect type of transmission fluid – … The check engine and sport lights are just confirming what is already known -- there's a problem, as indicated, with the turbine sensor. Subaru OBD-I (1990-5) Trouble Codes ... procedure (which can be found in the service manual). HELP. The car is probably switching into "fail safe" mode as soon as you try to go into 4th, This mode limits the engine speed and transmission gears, so it could seem as if the transmission is slipping. The ECT failure, if it exists, may alone account for that because an engine coolant temperature sensor is essentially a master sensor - the value of which must be available and reliable in order for the engine computer to properly control all ignition and fuel outputs.. Consequently, based on what you are … 05 WRX is in the "Limp Mode" Fail Safe mode. Limp mode allows you to reach up to 40 mph speeds. P1501 Idle Control System Malfunction (Fail Safe) P1502 Radiator Fan Function Problem. Overfilled CVT fluid level. Limp mode’s job is to minimize the potential harm from a major mechanical failure. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety. Limp mode can also be referred to as fail safe mode. When one of these sensors detects a mechanical fault, usually in the engine or transmission of the vehicle, it will trigger an OBD-II trouble code that activates the engine failsafe mode. P1511 Idle Air Control Solenoid Signal 1 Circuit High Input. It also helps to make fine-tuning adjustments to these systems to keep the car, truck or SUV running safe and efficient. Limp mode is a condition where the computer will make the transmission operate in a manner that will save it from its own destruction. The Subaru mech said to feed the cleaners in slow to prevent damage to the catalytic converter, which might be why subaru makes the special tool. - NASIOC Welcome to the North American Subaru Impreza Owners Club CVT whining and Fail Safe Mode gets fixed with a simple solution. Subaru Trouble Code Info Retrieving Trouble Codes 96 & later are OBD2 systems There are self-diagnositic connectors on all models, when connected with the key ON (engine off), flash trouble codes on the LED light of the oxygen moniter of the ECU. 2. HELP. What is Limp Mode? While the CVT is designed to go into fail-safe mode if the fluid temperature rises above the threshold, the following conditions may cause the CVT to go into fail-safe mode prematurely during normal vehicle operation: 1. Cars go in limp mode when the On-Board Diagnostic (OBD) system detects a critical problem. The main function of limp mode is to prevent further damage to the engine or transmission. P1512 Idle Air Control Solenoid Signal 2 … From the seat belt restraint system to the engine management system your Subaru is electronically controlled, with over 90 specific Subaru codes used to diagnose faults. Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 05 WRX is in the "Limp Mode" Fail Safe mode.