Diagnostic Trouble Code
P2034
Exhaust Gas Temperature EGT Sensor Circuit Low Bank 2 Sensor 2
Technical Description P2034
Exhaust Gas Temperature EGT Sensor Circuit Low Bank 2 Sensor 2
What Does This Mean P2034?
This is a generic powertrain code, which means it covers all makes/models, 1996-newer. However, specific troubleshooting steps will vary depending on the vehicle.
This diagnostic trouble code (DTC) P2034 refers to the condition of the EGT (exhaust gas temperature) sensor located in the "up" pipe forward of the catalytic converter. Its sole purpose in life is to protect the converter from damage due to excessive heat.
Code P2034 denotes a detected general malfunction within the EGR temperature sensor circuit on bank 2, sensor #1. This P2034 DTC refers to bank #2 (which is the side of the engine that doesn't contain cylinder #1). Related codes are P2035 (circuit low) and P2036 (circuit high).
An EGT sensor is found on most late model gas or diesel engines. It's nothing more than a heat sensitive resistor that converts the temperature of the exhaust into a voltage signal to the computer. It receives a 5-volt signal from the computer through one wire while the second wire is ground.
The higher the exhaust temperature the less resistance to ground resulting in a higher voltage -- conversely, the lower the temperature the more the resistance resulting in lower voltage. If the engine senses a low voltage, the computer will vary the engine's timing or fuel ratio to keep the temperature in acceptable ranges within the converter.
In a diesel, the EGT is used to determine the timing of regeneration of the PDF (diesel particulate filter) based on the temperature rise.
If a catless up pipe has been installed along with the removal of the catalytic converter, there is normally no provision for the EGT, or if there is it won't function correctly without the back pressure. This will set the code.
This diagnostic trouble code (DTC) P2034 refers to the condition of the EGT (exhaust gas temperature) sensor located in the "up" pipe forward of the catalytic converter. Its sole purpose in life is to protect the converter from damage due to excessive heat.
Code P2034 denotes a detected general malfunction within the EGR temperature sensor circuit on bank 2, sensor #1. This P2034 DTC refers to bank #2 (which is the side of the engine that doesn't contain cylinder #1). Related codes are P2035 (circuit low) and P2036 (circuit high).
An EGT sensor is found on most late model gas or diesel engines. It's nothing more than a heat sensitive resistor that converts the temperature of the exhaust into a voltage signal to the computer. It receives a 5-volt signal from the computer through one wire while the second wire is ground.
The higher the exhaust temperature the less resistance to ground resulting in a higher voltage -- conversely, the lower the temperature the more the resistance resulting in lower voltage. If the engine senses a low voltage, the computer will vary the engine's timing or fuel ratio to keep the temperature in acceptable ranges within the converter.
In a diesel, the EGT is used to determine the timing of regeneration of the PDF (diesel particulate filter) based on the temperature rise.
If a catless up pipe has been installed along with the removal of the catalytic converter, there is normally no provision for the EGT, or if there is it won't function correctly without the back pressure. This will set the code.
Possible Causes P2034
1
Check for loose or corroded connectors or terminals, which is often the case
2
Broken wires or missing insulation may be causing a short directly to ground
3
The sensor may have failed
4
A catback exhaust system without EGT provisions installed
5
It's possible, although not probable, that the computer has failed