P041C - OBD Trouble Code

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An Exhaust Gas Recirculation (EGR) Temperature Sensor is an electrode that reads the EGR temperature and relays the signal to the engine control module. When the engine control module (PCM) discovers an error signal from the EGR Temperature Sensor, the PCM sets the code P041C.

The EGR temperature sensor has a duty of providing a process for the ECM (Engine Control Module) to survey the temperature inside the EGR system and/or fix the relay by properly making use of the EGR valve. Using a common temperature sensitive resistor-type sensor easily processes this. Your OBD (On-Board Diagnostic) scan tool might demonstrate code P041C and other associated codes that are energized when the ECM uncovers a failure that is routed inside the EGR temperature sensor or its circuits. As brought up earlier, the system is embraced with the heated exhaust and encounters the vehicle’s hottest places, so be well aware of where your hands and fingers are going to touch with the engine switched off during a short duration of time. The code P041C Exhaust Gas Recirculation Temperature Sensor B Circuit Low is set by the ECM when there is down-scaled electrical value detected inside the EGR Temperature Sensor "B" circuit. Pursue what is the “B” part of the circuit by referring to a particular vehicle repair manual to make amends to your request.

What causes this problem Exhaust Gas Recirculation Temperature Sensor "B" Circuit Low

• Faulty or damaged EGR (Exhaust Gas Recirculation) temperature sensor
• EGR temperature sensor gasket leaking
• Split or leaking exhaust pipe when the sensor is mounted
• Scorched wiring harness and/or sensor
• Disfigured wire(s) (open, short to power, short to ground, etc.)
• Defaced connector
• ECM (Engine Control Module) Problem
• Deficient connections

1. Exhaust Gas Recirculation - A vacuum leak, a blocked fuel injector, weak fuel pressure, a leaking head gasket or other problems can sum up to enhancing the effects of nitrogen oxides. Moreover, a faulty ignition, a vacuum leak or an ignition system problem can result in a rough idle. Instead of jumping to spend money and replace parts, solve the problems related with the EGR valve and other system components as a way to reduce the problem.
2. EGR Temperature Sensor - A critical symptom that is recurrent when facing a bad or defective EGR temperature sensor is engine ping or knock. If the EGR temperature sensor starts to perform poorly, it causes problems recognized with the EGR system flow. This will result in the cylinder temperatures to accelerate, producing engine ping or knock, sounding similar to clattering metal that comes from the engine bay, and identifies a problem with the combustion performance. Any such problems lead to engine ping or knock that should be tested immediately by a mechanic, or else the engine knock can make for crucial engine damage if it stays being unchecked.
3. Exhaust Pipe - An exhaust pipe that leaks can destroy plastic parts in the engine bay, and is high-risk to health problems, as the exhaust fumes are capable of entering the car's cabin. If your exhaust manifold is split or leaking, the backing inside of the exhaust system will be pressurized incorrectly, which can decrease engine power, triggering explosive sounds and other problems. It is bound to take 2 to 3 hours to repair the exhaust leak for completion, which accounts for all the challenges of reaching for the exhaust, manifold.
4. Powertrain Control Module - A corroding PCM could be unforeseen to an extent that your vehicle will have issues starting or stalling when it’s running. You will begin seeing that exhaust fumes have shorted during the car’s run, emissions system control signals will begin to fail, so with a malfunctioned PCM, you should sort out replacing is as soon as possible.
5. Engine Control Module - Your vehicle may face problems with starting, especially after ensuring it’s imperative the battery and starter are functioning properly. If your vehicle’s puts up with issues that lead to a possible failure in the engine control module, it must be replaced as early as possible to keep the car from facing further critical risks.

Our customers are everything to us at Parts Avatar, and we are determined to help you properly to diagnose P02BA code by mentioning these few important tips:

Common Symptoms

• Defected smog or emissions state/provincial test
• Engine sounds (knocking, rattling, pinging, etc.)
• Louder exhaust
• Too many exhaust smells

The exhaust gas recirculation (EGR) system is outlined to reduce combustive temperatures and decrease oxides of nitrogen emissions (NOx). To properly manage this process, exhaust gases are displayed into the engine combustion chamber to cool down the fire blazes. In some cars they use an EGR temperature sensor to influence the EGR operation. The powertrain control module (PCM) uses this data to identify correct EGR control.

On many current diesel engines, an EGR cooler is used to cool down the exhaust gas temperature before entering the engine. The PCM relies on the EGR temperature sensors to check for the cooler’s means of usage. Essentially, a single temperature sensor is put on the exhaust manifold, and another is put next to the EGR valve.

The typical symptoms of a faulty EGR temperature sensor also come as pinging, growing emissions and an illuminated Check Engine Light.

Locate the EGR temperature sensor

In cautiously and impressively removing your EGR temperature sensor you need some basic tools:

• Free repair manuals (optional)
• Protective gloves
• Safety glasses

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

Remove the EGR temperature sensor

• Detach the corrupt battery cable and place it aside.
• Take off the electrical connector by punching down on the tab and shifting it off.
• Use a ratchet or wrench to loosen the sensor.
• Take off the sensor.

Install the new EGR temperature sensor

• Put in the new sensor. Mount the new sensor in place.
• Fasten in the new sensor by hand and then tighten it down using a ratchet or wrench.
• Re-equip the electrical connector. Link the electrical connector by shifting it into place.
• Relink the negative battery cable and tighten it down.
• You now successfully have a new EGR temperature sensor equipped.

We have written some helpful steps that you can follow to effectively diagnose this fault code:

Basic Step #1

Make an advanced checkup for parts easily noticed by doing a visual examination of the sensor and surrounding EGR system, searching for any indication of exhaust leaks. Moreover, check for the sensor and its harness at the time you’re operating inside. Estimate all the points we previously discussed about those high temperatures. They can seriously damage plastic and rubber coated wires so test them methodically.

Basic Step #2

A diverse range of EGR problems uncovered in the past were results of soot buildup in the exhaust and many other things, such as poor maintenance and low quality fuel, and so on. In such cases, it is not a deviation, so it would be smart to clean your EGR system or even the temperature sensor to give it that shine. Be mindful that mounted sensors inside the exhaust systems might feel like they were grabbed when trying to loosen.

Be regardful that these sensors are essential for significant temperature shifts, so even the smallest source of heat when using Oxyacetylene torch, only not for layman, might assist with loosening the sensor. When the sensor is being taken off, use the carburetor cleaner or any similar product to effectively sup up the soot. Take a wire brush and loosen the soot in any excessively piled up areas. When re-equipping the clean sensor, make certain to put some anti-grab to the strands to ease them abruptly taking a grip.

Basic Step #3

Justify the quality of the sensor by measuring the exact electrical values in comparison to the specified and demanded values called on by the manufacturer. Use the multimeter to do this and follow the specified pinout exam process made by the manufacturer.

Common mistakes when diagnosing the P041C code

• Defective EGR temperature sensor
• Failed Powertrain Control Module (PCM)
• Wiring problem