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Mercedes E320 smog fail

The smog check says OBD II not ready. I have driven for several hundred miles and retest but s tillfail. Car is 1996 year. The check engine e light comes on intermittently.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Red Check engine light on my 1994 E320

well..i am not sure whether this is gonna solve your problem..but i had the same head ache with the check engine & check engine electronics alert on the cluster instrument..i removed the battery terminals for 10 minutes and replaced them & my problem solved successfully..but just beware that you connect them together at the same time with no short circuits which might mislead u with the same problem.

Posted on Aug 29, 2008

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SOURCE: engine light 1999 mercedes e320

Most likely a gas cap or emissions issue, if you are sure the car is running fine. But you will have to have it scanned to know for sure.

Posted on Nov 14, 2008

  • 299 Answers

SOURCE: Failed TN emissions testing. 1996 Mazda

the computer needs to be reset by performing a code erase then drive 500 miles

Posted on Sep 23, 2009

iambanshee74
  • 3489 Answers

SOURCE: My 2002 VW Jetta failed smog due to MIL/Check

if this vehicle is driven in the city almost exclusively, take it out on the freeway a good 30-40 miles prior to taking it back to the smog shop. that should prime all the readiness sensors. make sure your doing some speed and not just going 55 in the slow lane. get the system nice and hot.

Posted on Dec 29, 2009

Testimonial: "very helpful thank you!"

  • 1 Answer

SOURCE: check engine light for a 1995 pontiac sunfire

p0441

Posted on Mar 12, 2010

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SMOG TEST OBD-11 NOT READY


Generally speaking, the truck has to be driven at least 100 miles in various driving conditions including highway and city driving and at full operating temp. The mechanics are correct in saying there is nothing they can do to trick the system into thinking this has happened.
If 100 miles did not do it you may have to drive 2 or 3 hundred miles then try the test.
The purpose of the computer being "ready" is having used and tested all of the emission components for problems. Once the vehicle is driven far enough for the computer to use all of the components, and no trouble codes are set, the test is passed.
Even if you normally only drive in the city you still have to log 50 or 60 miles on the highway to satisfy the requirement for the engine computer.

Oct 03, 2015 | Dodge Cars & Trucks

1 Answer

Engine light has come on. problem was starter motor which was repaired & flee through wof. but light is still on, it is a nissan primera station wagon import from japan. does anyone know how to change the...


Your vehicle is equipped with an OBD II computer AND a link to connect OBD II computer to a Smog Check Analyzer or Data Scan Tool (available
at most auto part stores).There are two types of codes, bad codes and good codes. The good codes are the "Readiness Flags". These Readiness Flags
indicate that certain emissions systems which the OBD II computer has been monitoring have PASSED the test, indicating that those systems are
working properly. Then there are the bad codes. The bad codes are actual "Trouble Code". These codes indicate that the OBD II computer
has detected a problem with in the emissions system. The Trouble Code will specifically indicate the component and problem which was found.
Newer vehicle's have very complex codes in the thousands.
"Readiness Flags" do not cause the "Check Engine" light to illuminate, but may cause a vehicle to fail the smog test.
In order to set all the proper "Readiness Flags" the OBDII system must complete at least one drive cycle (in some cases
two or three). A drive cycle is a sequence of internal tests which the OBDII computer runs while your vehicle is being driven. This insures
all emissions systems are functioning properly. Only then will your vehicle pass the smog inspection. A drive cycle usually requires one
week of driving.

Jun 10, 2014 | Cars & Trucks

1 Answer

Saturn codesP0000


Your vehicle is equipped with an OBD II computer AND a link to connect OBD II computer to a Smog Check Analyzer or Data Scan Tool (available
at most auto part stores).There are two types of codes, bad codes and good codes. The good codes are the "Readiness Flags". These Readiness Flags
indicate that certain emissions systems which the OBD II computer has been monitoring have PASSED the test, indicating that those systems are
working properly. Then there are the bad codes. The bad codes are actual "Trouble Code". These codes indicate that the OBD II computer
has detected a problem with in the emissions system. The Trouble Code will specifically indicate the component and problem which was found.
Newer vehicle's have very complex codes in the thousands.
"Readiness Flags" do not cause the "Check Engine" light to illuminate, but may cause a vehicle to fail the smog test.
In order to set all the proper "Readiness Flags" the OBDII system must complete at least one drive cycle (in some cases
two or three). A drive cycle is a sequence of internal tests which the OBDII computer runs while your vehicle is being driven. This insures
all emissions systems are functioning properly. Only then will your vehicle pass the smog inspection. A drive cycle usually requires one
week of driving.

Jun 10, 2014 | 2006 Saturn Vue

1 Answer

2006 hyundai elantra obd won't communicate with smog check station


Just to clear things up, having the monitors ready has nothing do to with OBD Communications. Ready or not, it will communicate. The original issue here was a station with a bad scanner. she did the right thing trying somewhere else and following up to get her $ back.

May 23, 2012 | 2006 Hyundai Elantra

1 Answer

Building emissions history to pass smog test


if you are failing emmissions test your evaporator canister is expired replace it and then you and your car will get a green light

Dec 31, 2011 | 2000 Ford Escort

1 Answer

1999 chev malibu - went for inspection today but would not pass. Car has not be driven much over the past year. Was told that we needed to reset the driving cycle. We were told this infomation could be...


Hi, I found this answer online for you.
"Just drive the car normally for about a week (50-75 miles various driving conditions) and the ready status should be complete to the point where the smog check will show ready. You can ask the smog check technician to check the readiness status before the test is redone to be sure."
Good Luck,
Wayne

Jan 25, 2011 | 1999 Chevrolet Malibu

3 Answers

Can't get my 96 chev s-10 to pass inspection due to Not ready codes. I recently change the battery and have driven the veh about 200 miles. Autozone checked and said it was all good but the state...


Here is the drive cycle procedure for that vehicle, and let me know if you require any further assistance.


Running an OBD-II Drive Cycle

The purpose of the OBD-II drive cycle is to run all of the onboard diagnostics. The drive cycle should be perfomed when any trouble codes are erased from the PCM or if the battery was dis-connected. Performing the drive cycle will reset the monitors so that any further trouble codes can be detected.

The OBD-II system drive cycle begins with a cold start with the coolant temperature below 120 degrees F. and the coolant and the air temperature sensors within 10 degrees of each other. (The ignition key must not be "on" or in the "Run" position until the cold start or the heated O2 sensor diagnostic might not start)

1. As soon as the vehicle starts up, idle the engine in drive for two and a half minutes with the AC and the rear defrost on if equipped with a rear window defroster. The OBD-II will check the O2 sensor circuits, the air pump, and the EVAP purge.

2. After the two and a half minutes turn off the AC and the rear window defrost, and then accelerate to 55 mph at half throttle. OBD-II checks for any ignition mis-fires, fuel trim, and canister purge.

3. Hold steady at 55 mph for three minutes. OBD-II monitors the EGR system, the air pump, the O2 sensors and the canister purge.

4. After the three minutes decelerate down to 20 mph without using the brakes or the clutch. OBD-II checks the EGR and the purge functions.

5. Accelerate back up to 55 mph at half throttle. OBD-II checks for mis-fires, fuel trim, and purge functions again.

6. Hold steady at 55 mph for five minutes. OBD-II will monitor catalytic converter efficiency, for any mis-fires, EGR function, fuel trim, O2 sensor operation, and purge functions.

7. Decelerate to a stiop without using the brakes or the clutch. OBD-II makes a final check of the EGR system and the canister purge functions.

Sep 12, 2010 | 1996 Chevrolet S-10 Pickup

2 Answers

Not Ready for Smog test


it is not how many miles but the type of driving.

here is a OBD2 drive cycle test.

Generic OBD II "Drive Cycle" Most OBD II ("On-Board Diagnostics II") diagnostic monitors will run at some time during normal operation of the vehicle.
However, to satisy all of the different Trip enable criteria and run all of the OBD II diagnostic monitors, the vehicle must be driven under a variety of conditions. The following drive cycle will (theoretically) allow all monitors to run on (??) vehicle. (Note: Drive cycle specifics vary by vehicle!)
  1. Ensure that the fuel tank is between 1/4 and 3/4 full.
  2. Start cold (below 86°F /30°C) and warm up until engine coolant temperature is at least 160° F (typically requires at least one minute; up to 3 minutes).
  3. Accelerate to 40-55 MPH at 25% throttle and maintain speed for five minutes.
  4. Decelerate without using the brake (coast down) to 20 MPH or less, then stop the vehicle. Allow the engine to idle for 10 seconds, turn the key off, and wait one minute.
  5. Restart and accelerate to 40-55 MPH at 25% throttle and maintain speed for two minutes.
  6. Decelerate with using the brake [or the clutch!] by coasting down to 20 MPH or less, then stop the vehicle. Allow the engine to idle for 10 seconds, turn the key off, and wait one minute.

Jun 04, 2010 | 2001 Kia Sephia

2 Answers

My 2002 Grand Prix GT 3.8L Won't pass emissions. Testing center's scanner says car was recently worked on and that the mileage driven since is not enough to recycle check engine light. The ck eng. light...


Nope, you just need more miles. When the car's computer has been disconnected from power (such as when the battery is unhooked), it'll set what are called "readiness codes" when power is reapplied. It takes a certain number of miles to clear these - some cars require 50 miles, some 100 miles, and some (such as some Isuzu models) need very specific drive cycles to clear them. Once the requisite number of miles have been driven without issues, the readiness codes will extinguish and your car should pass.

Dec 10, 2009 | 2002 Pontiac Grand Prix

1 Answer

1996 MERCEDES 320


Even after your car's problem is fixed, the 96s (engine code M104) are notorious for taking an unusually long time to reset the "all clear" in their OBD (on board diagnostic) system. I had to get three 30-day exemptions from the TN agency's top mechanical advisor, who was well aware of this. The car has to drive a crazy drive cycle, which you can find by googling including the OBD2 and "M104 drive cycle" and I will try to find and post it here. As for fixing the original light, go to Autozone or any chain auto parts store, they'll check and reset the light for ya FREE; write down the code and, if necessary, get the prob fixed. Sometimes it's just a loose gas cap, or an intermittent fault that'll not repeat, if you're lucky.

Mar 22, 2009 | 1996 Mercedes-Benz C-Class

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