Question about 1998 Cadillac Catera

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ONLY LOW AND REVERSE GEARS WORKING

What would cause this.

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That would be a problem with the direct or forward clutch pack inside of the transmission, and you will need to have a good transmission repair shop diagnose if the problem is a hydraulic pressure problem or an electrical control problem before a proper repair can be made.

Posted on Jun 12, 2010

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Posted on Jan 02, 2017

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I'm looking to purchase a used car. I've been doing online research and saw this webpage http://www.usedcarsmells.com . They talk about exhaust color and smells. Is it true that you could tell a lot about...


Yes this is correct, you can get important information from the colour of smoke from the exhaust:

Blue/Gray Smoke: Blue/gray exhaust smoke is an indication of oil burning in the combustion chamber. These are possible symptoms and causes:
Valve Seals: Leaking valve seals will cause blue/gray smoke at startup because oil leaks past the seals into the cylinder after the engine shuts down.
Valve Guides: Excessive clearance between the valve stem and the valve guide allows oil to leak past the gap into the cylinder.
Piston Rings: Worn or damaged piston rings will cause blow-by resulting in blue/gray smoke.
Worn Cylinder Walls: Worn cylinder walls cause blow-by resulting in blue/gray smoke.
PCV System: A stuck closed PCV valve will cause excessive crankcase pressure resulting in blue/gray smoke.
Black Smoke: Black exhaust smoke is an indication of a rich fuel condition. These are possible causes:
Fuel Injectors: A leaking or dripping fuel injector will cause a rich fuel condition.
Fuel Pressure Regulator: A stuck closed fuel pressure regulator will cause a rich fuel condition.
Fuel Return: A restricted fuel return line will cause a rich fuel condition.
White/Gray Smoke: White exhaust smoke is an indication that coolant is burning in the combustion chamber. These are possible causes:
Cylinder Head: A crack in the cylinder head (around the coolant jacket) will cause coolant to enter the combustion chamber.
Engine Block: A crack in the deck of an engine block near the coolant jacket will cause coolant to enter the combustion chamber.
Head Gasket: A damaged or blown head gasket will cause coolant to enter the combustion chamber resulting in white/gray smoke coming from the tailpipe.

Jan 17, 2015 | Cars & Trucks

1 Answer

Intermittent charging


Generally that indication implies generator failure. Generator failure can come in multiple forms. A faulty ground will cause the generator not to charge and potentially burn it up. A severed phase wind (remember, your alternator is really a three-phase generator with a six pulse front end rectifier set) will cause the light to intermittently come on along with weak charging output. A voltage regulator failure will cause zero field current in the rotor. A brush failure will also cause a generator failure light to come on and stay on. A rectifier failure (any of the six) will cause the generator not to charge properly and turn on the MIL and generator failure indicator (looks like a battery). The condition of the battery can also cause generator failure, if the battery is defective (buckled plates, weak electrolyte, low water, etc.) it will place a very high load on the generator continuously, causing it to 'full field' the rotor which can cause the rotor to overheat and fail. Never run a generator without the battery terminals connected as this will cause it to fail quite spectacularly. Do not attempt to verify output of the generator with the battery terminal leads disconnected.

If generator failure is indeed the cause, find out why. Generators rarely fail. When they do, it usually is caused by poor ground connections, corroded battery terminals, high continuous loads, electrical faults and poorly-wired ancillary equipment, such as head units, amplifiers, inverters, etc. Always check all these out when replacing the generator. Never run a generator without the battery terminals connected as this will cause it to fail quite spectacularly.

Jul 15, 2014 | 2010 Volvo S80 2.5

1 Answer

Will not start p2045 p2197 p0190 p2247 p2245 p2248 p2249 p2518 comes up


code p2045 refers to reductant temperature sensor--high input==causes --wiring faulty sensor
code p2197 refers to heated oxygen sensor(HO2S)1 bank 2-- signal stuck lean===causes HO2S---fuel pressure---injectors---intake leak
also refers to oxygen sensor (O2s)1 bank 2 -signal stuck lean===causes--O2S--fuel pressure---injectors---intake leak
also refers to heated oxygen sensor (HO2S) 1 bank 2--implausible signal===causes wiring---short to ground--short to positive--HO2S---ECM
code po190 refers to fuel rail pressure (FRP) sensor-circuit malfunction===causes --wiring ---fuel rail pressure sensor---ECM
code p2247 refers to heated oxygen sensor (HO2s) 1 bank 1 reference voltage--open circuit===causes--wiring ---ho2s
also refers to o2s 1 bank 2 reference voltage ---open circuit===causes wiring---o2s
also refers to HO2S 1 bank 2 ---no signal===causes wiring--ho2s---ECM
code p2245 refers to HO2S 1 bank 1 --reference voltage --circuit low===causes--wiring short to ground--ho2s also refers to o2s 1 bank 1 circuit low===causes wiring short to ground--o2s
code p2248 refers to the ho2s I bank --performance problem===causes --wiring--ho2s
code p2249 has the same causes short to ground---ho2s and o2s
code p2518 refers to a/c refrigerant pressure sensor B ---circuit high===causes wiring short to positive--a/c refrigerant pressure sensor.
so after all that replace all the ho2s and o2s sensors using the correct tools so that the wiring is not damaged and check the wiring back to the ECM for burns and rub marks.

Dec 30, 2013 | Cars & Trucks

3 Answers

I have a 1997 Bravada that has a bad oxygen censor and a bad caytalytic converter. Would both of these problems cause a misfire, and , wich sensor is in bank 2


Yes they can surely cause an misfire.

I cannot understand your statement "wich sensor is in bank 2"

If i am not wrong you are asking which sensor is present in bank 2 .

The 4th O2 sensor is located in bank 2

Mar 22, 2011 | 1997 Oldsmobile Bravada

2 Answers

Codes171 174


Do you mean codes P0171 and P0174? The 4.6L and 5.4L engines have problems with the rubber boot that connects the PCV tube to the back of the air plenum assembly. The rubber boot deteriorates and gets hols in it which causes lean O2 Sensor codes on both banks. The PCV Valves themselves also fail, causing the same codes. (These are the most common causes) The second most common cause is a malfunctioning MassAirflow Sensor (MAF). Severalother things can cause these two codes including any vacuum leak that is on the engine side of the mass airflow sensor, including holes in the intake "snorkel", intake manifold leaks, or any vacuum suply hoses leaking, including the brake booster hose or even a leaking brake booster. Low fuel pressure, caused by any one of several reasons, can also cause these 2 codes. Clogged injectors can also cause these codes, but are not likely to set both of these codes at once. (although it is possible) The least likely cause (although possible) is that both upstream O2 sensors have failed.

Jan 16, 2011 | 2004 Ford F150

1 Answer

I have a F250 lariat with a 460 - truck stalls when I put it in gear - even after it runs for 20 min. Sometimes it will stall while I'm driving. I had carborator replaced last year. Hope you can help.


Some possible causes could be:

Vacuum leaks cause an engine to run lean witch can cause the vehicle to stall when put into gear.

Improper base idle adjustment can cause the vehicle to stall when shifted into drive or reverse

A malfunctioning or damaged carburetor can cause the vehicle to stall when shifted into drive or reverse

Improper ignition timing can cause the vehicle to stall when shifted into drive or reverse.

A malfunctioning or damaged transmission or torque converter can cause the vehicle to stall when shifted into drive or reverse

Oct 31, 2010 | 1987 Ford F 250

1 Answer

Loud ticking noise


Ticking is generally associated with a valvetrain problem but may be caused by low oil level or pressure. Noise is in the upper half of the engine. Knocking is from low oil pressure and is caused by worn bearings causing pressure loss. Knocking is the worse of both conditions (means overhaul or engine replacement.) Ticking needs to be checked for it's cause...if cause is low oil pressure, remember...oil pumps don't cause low oil pressure, pressure will lost if bearings are worn or pump inlet screen is plugged with carbon.

Jul 18, 2009 | 1999 Jeep Cherokee

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