Question about 1996 Cadillac Eldorado

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95 cadillac deville whith both o2 sensor sending rich exhaust no codes fuel presure 38 psi at idle no leakin fuel injectors rear o2 sensor is new map sensor is ok 1.2 volt at idle tps is .68 volts at idle evap hoses are pluged I dont not what is the problem

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This may be the result of a faulty catalatic converter, get the exhaust checked out as My 97 caddy had simialr readings. Good luck

Posted on Nov 19, 2009

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3 Answers

How do i replace an oxygen sensor on 1993 cadillac deville


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Jan 19, 2016 | 1993 Cadillac DeVille

1 Answer

95 taurus with re manufactured 3.0l engine from ford runs rich at idle fails emission test. no codes, new motor from ford has 750 miles since install. o2 sens have been replaced no change still no codes...


check fuel pressure/volume, injectors, engine temp sensor for computer to know what the engine temp is, map sensor, timing, throttle position sensor. what emission did it fail might help.

Feb 12, 2015 | Ford Cars & Trucks

1 Answer

1980 Cadillac Biarritz 368 fuel injection


How about timing chain being worn & gears stripped ?

Put a timing light on it, then put the pick up on a wire
half way thru the firing order & see if they timing is
the same.

Feb 17, 2013 | 1980 Cadillac Eldorado

1 Answer

I have a code P0152 high oxygen sensor voltage on a Cadillac Deville 1999 what is the cause


Code 152 is for a high sensor signal from bank 2 sensor one. This is the sensor before the catalytic converter on the side with cylinder two.
The sensor is telling the computer the fuel mixture is too rich and that may or may not be true.
Code 175 is also for a rich mixture on bank two. Since you are getting both codes its possible you have a leaking injector on that side of the engine, or some other fuel problem.
It could also be a faulty O2 sensor sending a false signal.

Jan 22, 2013 | 1999 Cadillac DeVille

1 Answer

Won't pass smog, Rich idle.


First, is the check engine light on ?
You should have a code for the O2 sensor showing the exhaust gas is rich.
Could be a faulty injector, fuel pressure regulator, or O2 sensor.
Even a faulty thermostat would do it.

Sep 15, 2012 | 1991 Oldsmobile Cutlass Cruiser

1 Answer

WE ARE HAVING PROBLEM FINDING DIAGNOSTIC PROCEDURE FOR CADILLAC DIVILLE WITH DTCs P0029,P0047,P0137 and P0107


P0029 - Exhaust Valve Control Solenoid Circuit Range/Performance Bank 2
Causes:
- Dirty engine oil
- Low engine oil level
- Exhaust valve control solenoid circuit open or shorted
- Exhaust valve control solenoid circuit poor electrical connection
- Faulty exhaust valve control solenoid

Solutions:
- Change oil
- Replace exhaust valve control solenoid

P0047 - Turbocharger/Supercharger Boost Control A Circuit Low
This vehicle is not equipped with a turbocharger or supercharger if it is a 1994.

P0137 - o2 Sensor Circuit Low Voltage Bank 1 Sensor 2
Causes:
- Sensor circuit harness or connectors is open or shorted
- Rear heated oxygen sensor Bank 1 may be faulty
- Fuel pressure may be faulty
- Fuel injector may be faulty
- Intake air leaks

Solution:
Replacing the O2 Sensor 2 usually takes care of the problem.

P0107 - Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
Causes:
- Damage harness or connectors
- MAP sensor circuit is open or shorted
- MAP sensor
- Damaged PCM or ECM

Solutions:
- If damage, repair MAP sensor harness or connector
- Replace MAP sensor
- Replace PCM or ECM

Jan 25, 2011 | 1994 Cadillac DeVille

1 Answer

94 camry. 2.2 fed emissions. Rough idle. runs great any rpm off idle. have checked timing. vacuum leaks, plugs, spark, removed throttle body and iac and cleaned. removed egr. plugged intake. all with no...


Before we both knock ourselves out with fuel injector testing. Hook up a Digital voltmeter (DVM) to upstream O2 sensor and lets see how she is burning. Remember positive lead of DVM to signal wire and negative lead to ground. Anything above 550 mV is rich anything below 350mV is lean. Be mindful that an exhaust leak the size of a pin hole in this region can cause a rough idle. A healthy reading should bounce between 550mV and 350 mV.
Next to test is O2 is working block off air in take making mixture rich and see what O2 says about it . Then pull off a vacuum hose (a lean condition) and see if DVM drops to 200to 300mV's.
Keep me posted.

May 10, 2010 | 1994 Toyota Camry

4 Answers

Codes po174/171 cadillac deville northstar engine


Check for vacuum leaks around the intake. This is the most common cause for these codes.

Sep 12, 2008 | 2003 Cadillac Deville

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