Technical Description of OBD-II Trouble Code
The circuit for the Exhaust Gas Temperature EGT Sensor in Bank 2 Sensor 2 is experiencing a low voltage condition.
What does that mean?
This is a generic powertrain code that applies to all makes and models from 1996 onwards. However, the specific troubleshooting steps will vary depending on the vehicle.
This diagnostic trouble code (DTC) P2035 refers to the condition of the EGT (exhaust gas temperature) sensor located in the “up” pipe before the catalytic converter. Its main purpose is to protect the converter from damage caused by excessive heat. This code indicates that the circuit has a low voltage condition.
Code P2036 is a similar code that indicates a “high” voltage condition in the circuit. Both codes relate to the condition of the sensor, and the solution is the same for both. This P2035 DTC specifically refers to Bank #2, which is the side of the engine that does not contain cylinder #1. The DTC P2032 is essentially the same, but it applies to bank 1.
An EGT sensor is present in most late model gas or diesel engines. It is essentially a heat-sensitive resistor that converts the exhaust temperature into a voltage signal for the computer. It receives a 5-volt signal from the computer through one wire, while the second wire serves as the ground.
Here is an example of an EGT exhaust temperature sensor:
The resistance to ground decreases and the voltage increases as the exhaust temperature rises. Conversely, the resistance increases and the voltage decreases as the temperature decreases. If the engine detects a low voltage, the computer will adjust the engine’s timing or fuel ratio to maintain an acceptable temperature within the converter.
In a diesel engine, the EGT is used to determine the timing of regeneration of the Diesel Particulate Filter (DPF) based on the temperature rise.
If a catless up pipe has been installed and the catalytic converter has been removed, there is usually no provision for the EGT sensor, or if there is, it will not function correctly without back pressure. This will trigger the code.
Symptoms
The check engine light will illuminate, and the computer will store the code P2035. No other noticeable symptoms will be present.
Potential Causes
The possible causes for this DTC may include:
P2035 Repair Procedures
Another reason for this code to be triggered is if the catalytic converter has been replaced with a catback system. In most states, this is an illegal modification that can result in a significant fine if caught. It is advisable to check local and state laws regarding the removal of the catalytic converter, as it leads to uncontrolled emissions into the atmosphere. While the resistor method mentioned earlier may temporarily reset the code, it is everyone’s responsibility to contribute to keeping the atmosphere clean for future generations.
If it is not possible to mechanically resolve this issue, we offer the option to permanently delete this specific DTC. All other codes will continue to function. If you are interested in this option, please upload your ECU file to our portal.
