P040D GMC code

P040D – OBD II Trouble Code. What does OBD-II fault code P040D mean? An Exhaust Gas Recirculation (EGR) Temperature Sensor is an electrical sensing probe that monitors EGR temperature going in and out of the EGR Cooler and transmits the signal to the engine control control module.

Where is the EGR temperature sensor located?

exhaust manifold

The EGR temperature sensor is usually mounted in the exhaust manifold or mounted near the EGR valve.

What does code P042E mean?

What does OBD-II fault code P042E mean? OBD-II Code Decreased engine performance is defined as a Exhaust Gas Recirculation “A” Control Stuck Open. EGR (Exhaust Gas Recirculation) systems are used to reduce the combustion temperature, thus reducing emissions.

How much does it cost to replace the EGR sensor?

The average cost for EGR valve position sensor replacement is between $110 and $143. Labor costs are estimated between $57 and $72 while parts are priced between $53 and $71. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location.

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What could cause an EGR code?

Restricted or clogged EGR tubes. A clogged catalytic converter. Carbon buildup on the EGR temperature sensor. Faulty or lack of vacuum supply to the EGR.

How do I know if my DPFE sensor is bad?

A faulty DPFE sensor can cause several problems:

  1. increased emissions.
  2. rough idle.
  3. hesitation.
  4. decreased engine power.
  5. decreased fuel efficiency.
  6. failed emissions.
  7. check engine light on.


What does P0405 code mean?

Exhaust Gas Recirculation Sensor A

What does OBD-II fault code P0405 mean? OBD-II Code P0405 is defined as a Exhaust Gas Recirculation Sensor A Circuit Low. NOx gases, which are a leading cause of acid rain and in some people, respiratory problems, are formed when the engine combustion temperatures become too high (2500° F).

Can I replace my EGR valve myself?

Can I Do It Myself? Although it’s possible to complete an EGR valve replacement yourself, due to the need to access the engine chamber, it’s not recommended unless you’re an experienced mechanic.

Is it better to clean or replace EGR valve?

If your car is running fine at idle and you don’t have a check engine light, there’s no need to replace or clean an EGR valve. Some shops recommend periodic cleaning.

What damage can a faulty EGR valve cause?

A faulty EGR valve can cause problems with the flow and operation of the EGR system leading to performance issues including a reduction in power, reduced acceleration and decreased fuel efficiency. It can also cause vehicle emissions to increase.

What is EGR temperature sensor?

The EGR temperature sensor is an engine management sensor that is part of the EGR system. It works together with the EGR solenoid to control the flow of the EGR system. The sensor is installed in between the exhaust and intake manifold, and monitors the temperature of the exhaust gases.

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Can you clean a EGR temperature sensor?

Clean the EGR Temperature Sensor



While you might need to replace the EGR temperature sensor, this shouldn’t be your first step. Instead, you should consider cleaning the sensor first. In many cases, the issues can be resolved with this simple action.

How do you test a EGR temp sensor?


Zitat von Youtube: We need to touch terminal number one which is this guy on the left okay and again the ignition key is turned on and we should see roughly five volts worth of power getting to the tarnish connector.