Daytime running lights (or DRL) are specialized lights that come on when your Toyota Corolla’s regular headlights are turned off. Their purpose is to make it easier for other drivers to see you, theoretically decreasing the odds of getting into an accident. If your Corolla’s DRL warning light is on, the powertrain control module (commonly … Read more
P2271 is a generic DTC trouble code that can affect the Toyota Corolla. It indicates that the oxygen sensor located on bank 1 in the second position is continuously sending voltage with a value that is too rich. There are oxygen sensors on both sides of the catalytic converter. The “upstream” one is used for … Read more
P2279 is a generic OBD-II code. It indicates there is a vacuum leak coming from your Toyota Corolla’s air intake system. While P2279 is a generic code (it has the same definition for the Corolla as it would any other vehicle made after 1996), repair steps will vary based on model year and engine. The … Read more
P0605 is a relatively rare OBD-II trouble code that can occur in the Toyota Corolla. It indicates that PCM (powertrain control module) is not passing its ROM (read-only memory) self-test when you turn the ignition on. While P0605 is a generic code (it has the same meaning for any car or truck), it is most … Read more
P0116 indicates that your Toyota Corolla’s engine coolant temperature sensor is sending a signal to the PCM (powertrain control module) that is outside of its normal operating range (in terms of voltage). While P0116 is a generic OBD2 code (it has the same definition for any car or truck), it has the same basic causes … Read more
P0117 is a generic OBD2 code. It indicates that your Toyota Corolla’s PCM (powertrain control module) has detected the signal coming from the engine coolant temp (ECT) sensor has a voltage level below its normal operating range. With the ECT sensor, as the voltage level drops, it will appear that your Corolla is overheating. While … Read more
P0743 is a generic OBD2 code that can occur in the Toyota Corolla. It indicates that your ECU/TCM has found an issue with the torque converter clutch solenoid. It is a generic code (meaning it has the same definition for all cars and trucks). Repair steps are going to vary depending on your Corolla’s model … Read more
P0776 is a generic OBD2 code that can occur in Toyota Corolla’s equipped with an automatic transmission. This code indicates that the pressure control solenoid “B” inside your Corolla’s transmission is having a performance issue, or is stuck in the off position. P0776 Definition: Pressure Control Solenoid “B” – Performance/Stuck Here’s the definition of P0776, … Read more
P0400 is a standard code that indicates your Toyota Corolla’s EGR system is not working. The good news is that this code is not a breakdown risk and should not affect how your Corolla runs (assuming it’s the ONLY code). P0400 is a generic code, which means it has the same definition for the Corolla … Read more
P0103 is a common generic OBD2 trouble code that can occur in the Toyota Corolla. In plain English, the MAF sensor voltage signal is outside of the accepted range (too high). It’s important to understand what the MAF sensor does. It measures the air density and volume between the air filter and the intake manifold. It’s … Read more