P2426 - OBD Trouble Code

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The EGR system is skillfully planned to send a segment of immobile exhaust gases back towards the engine induction system where it is exchanged for clean air that is rich with oxygen. Exchanging the consumed exhaust gases for air that is rich of oxygen results in a decrease of nitrogen oxide (NOx) matter. Federal mandate controls the NOx, which is a provided component of ozone using up exhaust exhalation. The EGR cooling systems are utilized to decrease the temperature of EGR emissions prior to accessing the engine air induction system. The EGR cooling system performances are similar to a radiator or heater core. The engine coolant is covered inside of an area that is flattened, which is arranged so that EGR emissions might stream past it. A cooling fan is also utilized occasionally. The electronically commanded EGR cooling valve controls the stream of engine coolant towards the EGR cooler from under particular settings. The PCM utilizes input signals that come from the engine coolant temperature sensor (ECT) and the EGR cooler temperature sensor(s) are to find out at what time and to what extent the EGR cooling valve opens or closes at any moment given. The PCM inspects the EGR cooling valve control system voltage at any time the key is being turned.

The ECT and EGR cooler temperature sensors supply the PCM with a range of EGR cooler and engine coolant temperature. The PCM makes a comparison of the input signals to estimate for an alternative in case the EGR cooling system is performing intentionally or is unable to. The EGR temperature sensors are usually situated close to the EGR valve and ECT sensors are normally situated in either a cylinder head water jacket or intake manifold water jacket. If there is a critically low EGR cooling valve control system voltage, under the typical extent of parameters that are programmed, on the other hand, if the input signals coming from the EGR temperature sensor(s) do not share common features with the ECT sensor, then a code P2426 will be supplied and might illuminate the malfunction indicator lamp.

What causes this problem with the Exhaust Gas Recirculation Cooling Valve Control Circuit Low?

• EGR cooling valve control wiring or connectors has an open or short
• Engine coolant is low
• EGR temperature sensor(s) are defective
• EGR cooler is clogged
• Engine is overheated
• EGR cooling fan is faulty
• Exhaust Gas Recirculation Cooling Valve is faulty
• Exhaust Gas Recirculation Cooling Valve harness has an open or short
• Exhaust Gas Recirculation Cooling Valve circuit has a bad electrical connection

1. EGR Valve - A first major symptom with the EGR valve is an engine function problem. A plugged or malfunctioned EGR valve can interrupt the car’s air-fuel ratio that can result in engine function problems such as a power decrease, acceleration, and fuel efficiency. A major common symptom of a problem with the car’s EGR valve is an idle that is rough. It is not unusual for EGR valves to fail in functioning and get rammed in the open setting. This can result in exhaust emissions to circulate repeatedly in occurring that will result in an idle that is rough, even during times there is no desire for these settings. A Check Engine Light that illuminates is another symptom of defective or failing EGR valve. If the computer finds a problem with the vehicle’s EGR valve circuit or setting, it will embark to switch on the Check Engine Light as a way to affirm the driver of the problem. A vast range of problems can also trigger The Check Engine Light, so scanning the computer for error codes is highly considered.
2. Powertrain Control Module - Irregular engine behavior could determine a defective or 
   failing PCM. A failed computer may cause a vehicle to abruptly stall or fail in starting. If the PCM is dealing with any issues, it may resist the timing and fuel settings of the engine that might place a bad affect on the vehicle as it is processing. A defective PCM could result in a vehicle to deal with a reduction in fuel efficiency, power, and acceleration. A defective PCM might encounter a vehicle that fails in starting or faces any issues with restarting. If the PCM fails entirely, the vehicle stays dealing with a loss of engine power control, so it might fail in starting or be faced with issues while it runs as an outcome. The engine could still be cranking, but have no crucial inputs from the computer, so it will evidently not be able to start altogether.
3. Engine Coolant Temperature Sensor – A first major symptoms related to an error with the coolant temperature sensor is a bad fuel economy. If the coolant temperature sensor declines it can deliver a faulty signal directly to the computer and mislead fuel and timing estimations. It is not unusual for the coolant temperature sensor to fail and deliver a fixedly negative signal directly to the computer. This will result in the computer to believe the engine is going cold, even if it does not, and as an outcome will further consume fuel than needed. This will decrease the fuel economy, and may obstruct engine performance. Another symptom of a susceptible error with the coolant temperature sensor is when black smoke comes out of the car’s exhaust. If the coolant temperature sensor begins to fail and delivers a negative signal directly to the computer, this can muddle the computer and result in an uncalled for enriching in the fuel compound. If the fuel mixture gets to be too rich to an extent where the fuel is unable to acceptably burn inside the combustion chamber, it will be scorched inside the exhaust pipes and result in emitting black smoke. In critical situations, the black smoke might be substantial enough to alert that you should not drive the car. Another symptom of an error with the coolant temperature sensor is an engine that overheats. The coolant temperature sensor can also begin failing in a way that it results in transmitting a fixedly hot signal. This can result in the computer to improperly settle for a meager signal, which can cause it to overheat, and even discharge or make an engine ping sound.
4. Cylinder head – A cylinder can misfire due to any of these three symptoms; a loss of spark; the air or fuel compound balance is excessively outreached to correctly ignite; or a loss of compression. A loss of spark comes with anything that hinders coil voltage from jumping the electrode gap located at the end of the spark plug. These results could be worn, polluted or damaged spark plugs; faulty plug wires or even a cracked distributor cap. A weakened coil or too much rotor emission in a distributor could put an affect on all cylinders, not only a single cylinder. A lean misfire can happen when the air or fuel compound is too meager, with insufficient gasoline in the compound, to get burned. A dirty, plugged or malfunctioned fuel injector; including air leaks or low fuel pressure caused by a weak pump; limited filter or leaking pressure regulator can all cause these problems. Poor fuel pressure could affect all these cylinders instead of a single cylinder, as could most air leaks. A leaking EGR valve can also impose the same effect as an air leak. A loss of compression occurs when the cylinder is losing a majority its air/fuel compound prior to when it gets ignited. The most susceptible results in this setting are a leaking, even burned, exhaust valve or a blown out head gasket. If two adjacent cylinders are misfired, it is susceptible the head gasket positioned between them has failed. In addition, if an engine overheats or loses coolant, it is susceptible the head gasket is located the culprit. Irregular misfires are the worst type to diagnose, as the misfire comes and goes relying on engine cargo or performance settings. They appear to happen for no clear explanation. The engine might only misfire and be running rough while it is cold, but then be running smooth as it heats up. Otherwise, it might start and idle well, but then misfire or delay as it goes below load. In addition, it might run well at most times, but abruptly misfire or stop altogether for no clear explanation. Irregular misfires can be a serious challenge to make a diagnosis, so we can start with a stable misfire in as single cylinder prior to moving ahead to irregular misfires.
5. Intake Manifold Water Jacket - The engine usually runs smooth and strong. If coolant is leaking from one of the manifold bolts, nearest to the water jacket port on the front driver's side, even if it’s not a large amount, but after driving and allowing the cooling system to pressurize, lift the hood to see if moisture is collecting around the cap of the bolt. At the time the engine is cool, there is a small, greenish pool of liquid on the ledge of that section of the manifold, and of it might drip on the front of the engine. You might not see any misfiring, nor it might not appear to be polluting the oil, but when assembling the engine, the plastic spacer for the carburetor might crack and give way as it tightens down the carburetor, resulting in cracking the leg of the carburetor beneath the pressure. Seal it with RTV and until considering that you must replace or rebuild the carburetor, so then get another carburetor, as this one won't make it a second round. Reinstall and allow the RTV to dry for a couple days, but if more problems occur, drain it once more, and remove the bolt, and then sup it up with RTV again. Another way is to install a new gasket set and used Grey RTV to cover around the water jacket, as well as the copper on the remaining area.
6. EGR Pressure Sensor - A first major symptom of a problem with the EGR pressure sensor is an engine performance error. If the EGR pressure sensor sends an improper reading directly to the computer it can cause the EGR system to fail at performing. A faulty EGR system can result in engine performance issues, such as a rough idle, engine hesitation, and a decrease in ultimate engine power and fuel efficiency. Another major symptom of a possible issue with the EGR pressure sensor is a defective emissions test. If the EGR pressure sensor has any errors, which can negatively affect the performance of the EGR system, it can cause the vehicle to fail the emissions inspection. This is definitely crucial below settings that need the vehicle to pass an emissions test so it can gather data on the vehicle performance. Another symptom of a problem with the EGR pressure sensor is a Check Engine Light. If the computer detects a problem with the EGR pressure sensor signal or circuit, the Check Engine Light will illuminate so it can notify the driver of an apparent error. A wide variety of errors can trigger a Check Engine Light so scanning the computer for trouble codes is highly recommended.
7. Cooling Valve - A first major symptom of a defective cooling valve is a heater that fails to process warm air. If the heater control valve breaks or gets jammed, the coolant flowing to the heater core might be limited or averted entirely. Having no coolant flowing directly to the heater core, the heater will be unable to process warm air for the cabin. Another major common symptom of a problem with the heater control valve is a leaking coolant. Over time, the heater control valve can get worn out and cracked that will cause the coolant to leak out of the valve. Heater control valves can also leak from too much corrosion when getting in contact with aged or polluted engine coolant. Normally a leaking control valve will need replacing so the leak can be repaired.
8. RPM Speed Sensor - A defective vehicle speed sensor can result in a wide range of errors. 
   Symptoms of a defective speed sensor might also cause symptoms of other common parts such as a faulty coil pack or poor throttle position sensor. Regardless, we share a line of the common symptoms related to a poor engine speed sensor: Transmission increases in speed before it shifts gears. The vehicle’s transmission draws behind to engage into overdrive and occasionally it never takes that step to top gear. Brakes are occasionally harder to manage than usual during coasting. The speedometer acts out irregularly or at times does not function altogether. 
   The check engine light illuminates erratically and periodically during acceleration. The overdrive on/off light flashes on repeatedly for no clear explanation. If your car is facing any of these symptoms above, you have to bring your car into a local dealership to make sure they run a computer diagnostic for your vehicle. As a few of the errors might appear to be related with the transmission, it is normally better to bring your vehicle to a repair shop that has absolute computer diagnostic equipment in advance to visiting a custom repair shop.
9. Barometric Pressure Sensor - A symptom that is commonly related with a troubled barometric pressure sensor is a badly functioning engine. If the BAP sensor deals with a functional break, it can deliver an improper signal directly to the computer that might badly affect the overall engine performance. The BAP sensor sends out a reading that assists to find out the fuel and timing settings, so if the signal is settled for any explanation, then the computer estimations will be mislead. This might cause a slow acceleration, loss of power, and misfires in even critical situations. Another frequent symptom of a failing BAP sensor is a Check Engine Light that illuminates. When the computer indicates an error with the BAP sensor or signal, it will illuminate the Check Engine Light to make the driver aware of a problem has been found. The BAP sensors are essential parts that are detected on a majority of modern engine controlled systems. They are easy in nature as they perform by using atmospheric pressure and they can be challenging to test. Basically, if you surmise that your BAP sensor might be experiencing an error, or your Check Engine Light illuminates, make sure the professional mechanic tests the vehicle. 
   The mechanic will manage to find out if your car needs for a barometric sensor replacement, or make any other repairs that can simply correct the error.

Our team at Parts Avatar Canada cares about our customers, so we are geared to help you diagnose the P2426 code by sharing a few important symptoms. They are described below as the following:

Common Symptoms

• There are no symptoms (only as code storage)
• Reduced cylinder temperature Declined
• fuel efficiency Exhaust temperature sensor codes are stored
• Engine temperature sensor codes are stored
• Engine Light illuminates (otherwise Service Engine Soon Warning Light)

Take a glance at a few methods that can help you correct the P2426 code:

• The exhaust gas temperature sensor is in the range of the temperature reactive resistor.
• In any case, the reference voltage or ground circuits are opening, then utilize the digital volt/ohmmeter to detect for progression, disengaging all associated control modules from the circuit prior to detecting circuit resistance or controller damage that might take place, including resistance in all of the circuits.
• The PCM will be able to read the sensor resistance and send it through.
• In any case, the code fails to come back instantly; you might be faced with an irregular setting.

Do not get frustrated if you are still dealing with any of these problems, since we care about our customers and that is why we provide a beneficial extension of EGR, ECT, PCM, Coolant temperature, Cylinder head, Water jacket, DPFE, MAP, Cooling valve, Engine overheating, RPM, BMP and even more. We are certain that all of your problems will be solved in no time.

If you simply want to diagnose this error code, then all you need to do is read through these points, which are described below as follows:

• The engine cooling system has to be filled to the appropriate level with the proper coolant prior continuing. If the engine coolant is leaking or the engine is overheated, it has to be repaired prior to continuing to make a diagnosis of the supplied P2426 code.
• A diagnostic scanner, a digital volt/ohmmeter, a reference of vehicle data, and a radiated thermometer that has a laser pointer, are a few of the tools that are useful to make a diagnosis of a P2426 code.
• You can start with a visible monitoring of the wiring harnesses and connectors related to both the EGR temperature sensor and the ECT sensor. Harnesses that are in close enough to heated exhaust pipes and manifolds have to be cautiously tested.
• Engage the scanner to the vehicle diagnostic port and receive all supplied codes and relevant freeze frame data. In advance to clearing the codes, make sure the vehicle is test-driven, as you might want to record all this data in regards to providing this is an irregular code.
• At this extent, one of two incidences will happen: either the PCM will access readiness mode that is with no codes supplied or the P2426 code will get reset. If the PCM accesses readiness mode, the P2426 code is erratic and will be more challenging to make a diagnosis.
• In a majority of situations, the case will need to get worse before having to make a consistent diagnosis. If the P2426 code does get reset, utilize the scanner data flow to watch for both the EGR temperature sensor data and ECT sensor data. Slimming down the scanner data stream to incorporate only relevant data that will provide a quicker comeback of data.
• If the scanner specifies EGR temperature and ECT are within satisfactory parameters, surmise a faulty PCM or a PCM programming conflict. This framework is the least of your worries. If EGR temperature sensor data or ECT sensor data is irregular or not in the range of the wanted parameters, inspect the sensor(s) by going through these testing processes and identifications situated in your reference of vehicle data.
• Sensors that fail to concur with vehicle builder’s identifications have to be recommended as faulty. Utilize the DVOM to examine the EGR cooling valve control circuit if the sensors are functioning correctly. Take consideration to disengage all associated controllers prior to inspecting. Make sure to repair or replace open or shorted circuits as needed.

Common Mistakes When Diagnosing the P2426 Code

The most recurrent misdiagnosis comes from anyone who specializes in the EGR valve and spontaneously replaces the costly component. The EGR valve is defective far less commonly than other parts, intake crossings, or circuitry.