Question about 1996 Mercedes-Benz C-Class

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97 C230 ODB2 P400 code, EGR System where should I start

The check engine light is on. When I pull the codes I get a P400 fault and a P460 pending code. The code only says "EGR System" I was wondering where to start looking for the problem.

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Check your IAC Idle Air control valve. It is located on the top right back of the motor behind the air intake. You can also remove the EGR valve and check to see that the piston is not gummed up. If it is then replace that. Also look for simple cracks on the boots or hoses sometimes that will cause this to happen. If this helped please rate. Thank you

Posted on Feb 12, 2009

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Some fault codes require multiple stop/start cycles (operating the vehicle) before it will throw a check engine light. When the code says it is pending, the ECU has detected sensor values beyond the norm. It will monitor the systems and if the problem doesn't go away (the ECU continues to see erroneous values) it will confirm the code and turn on the check engine light.

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Hello
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

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My check engine light comes on and stays for awhile then goes off. It will stay off for about a month then come back on, I need to know the location of the egr valve on a 97 nissen sentra.


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I have a 2001 Nissan Altima & my Service Engine Soon lite comes on. When checked these are the error code's; P1441 & P400. So far I put in a new EGR but still the lite goes back on. Please help...


On the nissan is there a swirl chamber code that comes on also, If it does then its truly a EGR code, but if the code is 1441 and 400 then its not the EGR, 400 is the EGR system not the EGR you r fix and solution is to solve P1441 the 400 is for function only. the failure is 1441 here is the definition Fuel filler cap, replace your gas cap and if its the type that click as you close the cap make sure it does Leave the EGR alone

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Where is the plug in a 1994 toyota camry to hook up the diagnostic code box


Hi, according to autozone.com, the connector is under hood, driver side, side of strut tower, mounted on strut tower. The pic below, hoewever shows it mounted to the intake manifold. This is an OBD1 connector. You must use an OBD1 scanner to extract trouble codes or use the manual procedure pasted below. Please let me know if you need an explanation of the trouble codes (please specify your engine and trouble code) or have any other questions.

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All models except the 1MZ-FE engine is equipped with OBD I till 1995.
  1. Make sure the battery voltage is at least 11 volts.
  2. Make sure the throttle valve is fully closed.
  3. Place the gear shift lever in Neutral. Turn all accessories off.
  4. The engine should be at normal operating temperature.
  5. Using a jumper wire, connect terminals TE1 and E1 of the Data Link Connector 1 (DLC1).
  6. Turn the ignition switch ON , but do not start the engine. Read the diagnostic code by the counting the number of flashes of the malfunction indicator lamp.
  7. Codes will flash in numerical order. If no faults are stored, the lamp flashes continuously every 1 / 2 second. This is sometimes called the Normal or System Clear signal.
  8. After the diagnosis check, turn the ignition OFF and remove the jumper wire.
  9. Compare the codes found to the applicable diagnostic code chart. If necessary, refer to the individual component tests in this section. If the component tests are OK, test the wire harness and connectors for shorts, opens and poor connections.

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I have a 1997 Chevy Blazer with the 4.3 engine. The Service Engine light keeps coming on. I scanned the codes and replaced the O2 sensor just before the catalytic converter. The light is still coming on...


P0146 pd means pending code
Pending codes and DTCs? Posted on November 12, 2010 by fcrmaster
When reading codes from your vehicle the fault code reader may show them as pending codes or normal Diagnostic Trouble Codes (DTC).
Pending codes (also known as continuous monitor codes) will be registered when an intermittent fault occurs. If that fault does not happen again after x number of start/stop cycles, the ECU will erase the code from memory. If the fault is persistent it becomes a DTC.
If you have read pending codes it is advisable to check the codes again after a week or so. If there is no apparent problem with the vehicle it is safe to erase the codes too and check back. But always make a note of any fault codes with the date and mileage of a vehicle.
If the codes read include a DTC then you need to investigate further. This you can either do yourself or advise your garage. If, again, you don't see an apparent problem (depending n the severity of the code) with the vehicle you can note the codes down and erase them. Then check again after a week or a few days depending on how often the vehicle gets used. If a repair has been made (previous owner) the DTC may just not have been reset after the repair.
The other numbers behind the code 01/06 , 02/06, 03/06 , 05/06 ,04/06 These don't mean anything . cheap code reader .
DTC P0140 HO2S Circuit Insufficient Activity Sensor 2
DTC P0146 HO2S Circuit Insufficient Activity Bank 1 Sensor 3
DTC P0171 Fuel Trim System Lean Bank 1
DTC P0174 Fuel Trim System Lean Bank 2
Sorry but this is something you should take to a qualified repair shop that has a diagnostic tool that can view sensor scan data.
Causes of lean condition trouble codes P0171 P0174 GM 5 3L

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