What are the probable causes of DTC P0488?

The Code won't Delete until you fix the problem. Clean or replace the EGR Valve.

Engine Trouble Code Error P0488 - PartsAvatar.ca

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P0488 is a diagnostic trouble code (DTC) for "Exhaust Gas Recirculation Throttle Control Circuit "A" Range/Performance". P0488 means that the powertrain ...
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P0488 - Exhaust Gas Recirculation (EGR) System Throttle ...

https://www.troublecodes.net > pcodes > p0488
Nov 18, 2015 - A stored code P0488 means that the powertrain control module (PCM) has detected a discrepancy between the actual position of the exhaust gas ...

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What DTC - diagnostic trouble code is stored in the engine computer ? You can take it to most auto parts stores an they will check it for free !

P0303 ignition misfire on cylinder #3.
Possible Causes:

1.Fuel injectors, related wiring, sensors, computer issues
2. Running out of gas, or poor fuel quality
3. Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
4. Incorrect Fuel Pressure
5. EGR system concerns: leaking EGR valve or restricted ports
6.Base engine concerns: low compression, valve train problems and timing issues
7. Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

You will have diagnose each element until you find root cause.
And it could be more than one element faulting out.
You

You may need to disconnect the battery for 60 seconds to get it to reset.

Well in my Advice please check connecters grips might be they have some carrageen in front of engine & bay & near that EGR valve might be some grip lose or broken just replace it or tight it , well yes you can wash EGR valve with petrol or you can use anti rust spray(WD-40 or carby cleaner) ...hopfully you ll fix your car best of luck.....

problem is typically the sensor or the device that is being monitored by the sensor. The the EGR return pipe is not properly engineered, a cold pipe with cause the inside to gum up with carbon deposit. This pipe is used to pick up exhaust gas to dilute the air before the combustion. If this "connection" is clogged, you will have a rough time at higher speeds. Pipe is easy enough to remote and take a look inside. If the gum up is too thick, I won't spend the time to chissle this out and just buy a replacement.

You can have a look at the position of EGR valve and where it is located in following link:

just had this on my 2007 2.0 did outlander, replaced the egr throttle body which cleared fault code p0487 which i also had, but p0488 was a little more tricky to find out what it was, after searching the internet i checked the fuses, sure enough a 15a fuse had blown, about 6th from the right as you look at the fuse box with an engine symbol identifyng it. changed the fuse cleared the fault code job done, it seems a broken egr throttle body will blow this fuse according to my research. hope this helps someone.

code P0488 exhaust gas recirculation closed valve pintle error ( EGR Valve ) most likely replace the valve.

code P0496 evaporative emission system continuous purge flow. could be many things, Gas cap, purge valve , purge canister, probably need to have this one check by the dealer.

P1406 Code - EGR Valve Pintle Position Circuit
The PCM monitors the EGR valve pintle position input to ensure that the valve responds properly to commands from the PCM and to detect a malfunction if the pintle position sensor and control circuits are open or shorted. If the PCM detects a pintle position signal voltage outside the normal range of the pintle position sensor, or a signal voltage that is not within a tolerance considered acceptable for proper EGR system operation, the PCM will set DTC P1406.

CONDITIONS FOR SETTING THE DTC

Ignition 1 voltage is greater than 10 volts.
EGR Feedback is less than 0.14 volt at any time.

OR

EGR Feedback is 0.4 volt greater or less than the EGR Closed Valve Pintle Position when the Desired EGR Position is commanded to 0%.

OR

Actual EGR Position is 20% greater or less than the Desired EGR Position.
Any of the above conditions are present for longer than 20 seconds.

ACTION TAKEN WHEN THE DTC SETS

The PCM will illuminate the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
The PCM will store conditions which were present when the DTC set as Freeze Frame and Fail Records data.

CONDITIONS FOR CLEARING THE MIL/DTC

The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic has been run and passed.
The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
The DTC can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.

DIAGNOSTIC AIDS
Check for the following conditions:

Open EGR ignition filter circuit.

An open in the EGR ignition filter circuit will cause EGR Position Error to vary erratically while the EGR valve is operating. With the ignition ON, a test light should illuminate when connected between ground and the EGR ignition filter circuit at the PCM connector. If not, locate and repair the open in the EGR ignition filter circuit.

Excessive deposits on EGR valve pintle or seat.

Remove the EGR valve and check for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.

Poor connection or damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the Actual EGR position display on the scan tool while moving connectors and wiring harnesses related to the EGR valve. A change in the display will indicate the location of the malfunction.

Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set

TEST DESCRIPTION
Number(s) below refer to the step number(s) on the Diagnostic Table:

Verifies that the malfunction is present.

The PCM contains a recirculation diode which filters the EGR ignition feed for the EGR valve. The recirculation diode is connected to the ignition filter (EGR ignition feed) circuit. If the ignition filter circuit is open, Actual EGR position may be erratic when compared to Desired EGR position. An open in the EGR ignition filter circuit will cause DTC P1406 to be set after an extended period of time.
If DTC P1406 will only set under certain conditions, the malfunction may be intermittent; refer to DTC P1406 Diagnostic Aids. If an intermittent wiring problem is not present, check for a poor connection at the PCM or the EGR valve. If the connections are OK and DTC P1406 continues to set, replace the EGR valve.

This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.


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P0301 Code - Cylinder #1 Misfire Detected
A P0301 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #1.

Symptoms may include:
the engine may be harder to start
the engine may stumble / stumble, and/or hesitate
other symptoms may also be present

Causes: A code P0301 may mean that one or more of the following has happened:
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

Possible Solutions:
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.


Check it and keep us updated.