Question about 2002 Cadillac Seville

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2002 CADILLAC CANT PASS SMOG

CODES THAT ARE COMING UP P0507

Posted by KARLA HENDRIX on

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Dan Jacobs

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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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5 Related Answers

michael wiggins

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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

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Shorty1_wt

William Thompson

  • 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

Luke Bradford

  • 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

ZJ Limited

  • 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

Ted Schore

  • 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

P0068, P0171, and P0446 and new ones down below


-I hate to say that but absolutely NO. If you don't know much about car. All these codes are emission code.
P0068 Mean Throttle position sensor.
P0171 Mean system too lean.
P0446 Mean evaporator emission control system has not correct flow
P0507 Mean Idle air control is too hight.
P0116 Mean engine coolant temperature.

Need to have a mechanic to check one by one to determine which part is effect before replace it.

Good luck

Mai Lor

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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

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use silicon spray,a small area at a time,to localise the noise,do it in a very quiet area(no kids)sorry had to get that in....

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ERROR CODES


The following are generic OBD II codes so your Sabb may not conform:
P0507=Idle Control System RPM High
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Oct 06, 2008 | 2004 Saab 9-3

1 Answer

Fault code P0507


This ought to help, better late than never ;-)

http://www.obd-codes.com/p0507

Jul 26, 2008 | Chrysler Sebring Cars & Trucks

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