Helpful Automotive Resources
November 10, 2020 Code P1135 Toyota: A Case StudyP1135 stands for A/F Sensor Heater Circuit (Bank 1, Sensor 1). The code indicates that the engine control module (ECM) has detected a problem with the air-fuel ratio sensor 1 heater circuit on bank 1.
What is an A/F Ratio Sensor? November 10, 2020 P013A Code: O2 Sensor Slow Response – Rich to Lean (Bank 1 Sensor 2)Diagnostic trouble code (DTC) P013A stands for “O2 Sensor Slow Response – Rich to Lean (Bank 1 Sensor 2).” It is logged once the PCM perceives that the post-catalytic converter oxygen sensor (Sensor 2) in Bank 1 is responding slowly. Bank 1 refers to the side of the engine that December 01, 2020 P20BA Code: Reductant Heater “A” Control Circuit PerformanceThe designation of reductant heaters is used in vehicles that have multiple units. In order to determine which is the “A” circuit in your specific application, you will need to consult a specific repair manual or database.
P20BA code means that your vehicle’s PCM has detected that the voltage signal from