Question about 2002 Cadillac Seville

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2002 CADILLAC CANT PASS SMOG

CODES THAT ARE COMING UP P0507

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  • Cadillac Master
  • 808 Answers

P0507 code idle speed is high than expected. Partially stuck open thermostat can make the computer think that the car is cold and command a higher idle speed. A small vacuum leak will also raise the idle speed. Throttle plate not fully closed cause this condition. Once problem is solved then clearing codes will leave computer monitors at incomplete which will still fail state inspection by driving the car over several days with a fuel tank between 15%-85% will allow them to run to completion. Ask your state inspector how many monitors need to run to completion the hardest ones to complete are EVAP, SEC.AIR, CAT.

Posted on Nov 08, 2013

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Posted on Jan 02, 2017

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SOURCE: How do I turn off the Traction control system on my 2002 Cadillac

press the traction control switch.

Posted on May 19, 2009

Shorty1_wt
  • 324 Answers

SOURCE: My cadillac deville has the following engine codes

click on the below links for code details.
P0106

P0121

P0171

P0174


P0335


P0340

P0385

P0442

P0506

P0507

P0601.

all of the above codes seem to have a common cause, they all list a bad ecm (computer) as being a cause, and the last code P0601 points specifically to a bad computer. sorry for the bad news, hope this helps.

Posted on Jan 28, 2010

luke_bradfor
  • 662 Answers

SOURCE: How ddo I get the

The vehilce speed sensor (VSS) will need to be replaced to repair this fault.

Posted on Feb 24, 2011

ZJLimited
  • 17970 Answers

SOURCE: 1994 cadillac sedan 4.9 engine will not pass smog.

The HC is high because the CO is high, CO is caused by to much fuel being delivered. You will want to check the Oxygen sensor and make sure it is functioning properly. You will want to check the fuel pressures, including rest pressure. We have seen leaking injectors cause this problem. You will want to make sure the thermostat is working correctly also.

First thing to do is check over the sensors that control the fuel mixture as it sounds like you're runnign too rich. This could be due to a faulty water temp sensor. If this is the problem then the ECU (Engine Control Unit / aka computer) will be leaving the car constantly 'on choke' and not reducing the fuelling as the engine warms - so unplug the sensor and clean the contacts on both sides with some switch / electrical cleaner (not WD40) and inspect the wiring for any signs of damage to the insulation especially where it runs over other components and through the bulkhead

If the engine is running well and the state of tune and ignition timing is good (15 degrees BTDC) then most likely the converter itself is bad. Usually NOx readings will go down as HC and CO readings go up, and as a result it is extremely rare for a car to fail an emissions test with all three things if the Catalytic Converter is working properly.

A bad oxygen sensor can also cause a failure similar to this, but will usually cause HC/CO readings to be high (but NOx readings would be low), or the opposite - high NOx but low HC/CO readings. The O2 sensor is located in the exhaust manifold just before the bulge of the catylst and at the point where the 4 pipes join together.

Unfortunately there is no good way to test the Cat. Highly specialized equipment is necessary to do this, however a temperature test might clue you in to one that is bad.

After driving the vehicle for several miles, immediately check the temperature of the converter at the very front and the very rear of the unit itself. The rear should be at least 100 degrees (F) hotter than the front. If the two are close to the same temperature then it is proof the converter isn't working very well.

I have to note though that temperature testing is far from conclusive. I've seen converters that pass test with flying colors but still ended up needing to be replaced.

Aftermarket converters tend to be less effective than factory converters because they are not built specifically for your vehicle. Instead, a universal unit is welded into some exhaust pipes so that it will fit. Generally this isn't an issue, but if you live in a 'green' state such as California where emissions standards are very strict, it could pose a problem.

Keep us updated.

Posted on Aug 02, 2011

  • 7353 Answers

SOURCE: removal of egr valve in 93 cadillac, didn't

I would not remove it unless its bad. did it not pass smog because of that? the valve either good or bad and does not need to be removed to check it. it either opens or it doesnt with vacuum applied.

Posted on Aug 04, 2011

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1 Answer

How can I reset my '99 caddy sts's computer in order to pass my smog


You can use a code reader/coder clearer handheld device at any of the major auto dealers to clear the code. The device plugs into your dashboard on the left side of the steering wheel at the bottom.. Normally, you can clear the code and drive for about 15 minutes (maybe more if you are gentle on the gas) before the code appears again. These code readers cost about $80 to $100.

May 01, 2013 | Cadillac DeVille Cars & Trucks

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MY 2002 CADILLAC SEVILLE HAS CODES COMING UP WHAT DOES THESE CODES MEAN


Code 507 is for a problem with the idle speed control being too high, and code 741 is for a problem with the torque converter clutch circuit.
You would check for vac leaks and see if the idle air control valve is working, and check the circuit for the torque converter clutch.

Jan 12, 2013 | 2002 Cadillac Seville

1 Answer

2002 CADILLAC SEVILLE CANT PASS SMOG


P0507 Higher idle speed than expected partially stuck open thermostat engine running colder than normal raises idle speed. Small vacuum leak raises idle speed. sticking throttle cable holding throttle plate open.
P0741 Torque Converter Clutch system stuck off : Code conditions : No engine or transaxle system codes set, engine run time over 5 seconds , Throttle Fluid pressure switch not indicating Park/Neutral,TCC commanded On @ max duty cycle, throttle angle over 8% Trans fluid Temp input 68-248f Degrees not in fuel cut off, trans gear ratio indicates 2nd, 3rd, 4th gear delivered torque 32-150 ft lbs, the PCM detected a TCC slip value that was over the torque limits . most likely cause is bad tcc solenoid or torque converter itself. Trans shop can diagnose and repair

Jan 12, 2013 | 2002 Cadillac Seville

1 Answer

Removal of egr valve in 93 cadillac, didn't pass smog, want to check egr valve


I would not remove it unless its bad. did it not pass smog because of that? the valve either good or bad and does not need to be removed to check it. it either opens or it doesnt with vacuum applied.

Aug 04, 2011 | 1993 Cadillac Seville

1 Answer

Have a2005 deville with the code po741 cant pass ca. smog need to what dose it takes to fix this problem


Hi,

Code P0741 = Torque Converter Clutch Circuit Performance or Stuck Off. This relates to your transmission only and has nothing to do with Exhaust emmissions.

If failed smog test, there must be an issue within your emmission system, e.g. sensors etc

You will need to have your codes read again, or have your vehicle properly inspected.


Cheers,

Jun 14, 2011 | Cadillac DeVille Cars & Trucks

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Wont pass smog check check engene light is on


Take it to a shop and have the car scanned for the codes. This will tell you exactly what is wrong.They usually do it for free and only takes ten minutes. It is most likely a sensor or an egr problem.Cant really know until you get the codes. Good luck.

Mar 28, 2010 | 2002 Chevrolet Impala

1 Answer

My cadillac deville has the following engine codes when hooed up: P0106, P0121, P0171, P0174, P0335, P0340, P0385, P0442, P0506, P0506, P0507, P0601.


click on the below links for code details.
P0106

P0121

P0171

P0174


P0335


P0340

P0385

P0442

P0506

P0507

P0601.

all of the above codes seem to have a common cause, they all list a bad ecm (computer) as being a cause, and the last code P0601 points specifically to a bad computer. sorry for the bad news, hope this helps.

Dec 06, 2009 | 2000 Cadillac DeVille

1 Answer

2002 Hyundai Sonata wont pass smog


CA you can take the car to a referree and get a one time waiver if you have spent a minimum of $450 on repairs not including smog fees. Gives you two years to get it fixed. Smog Referee Call Center
Toll Free: 1.800.622.7733
You can also sell the car to the state for "up to" $1,000

Aug 19, 2008 | Hyundai Motor 2002 Sonata

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