|
Question:
1999 Ford E 150 mileage: 107,000. The
vehicle lacks power, especially when it is
cold. It also has to downshift to
maintain a set 65 mph with cruise on.
This has gradually occurred over about 3
months. I ran a self-test scanner on
it, the response was code 225 "Knock sensor
signal not detected". I am not sure
what that means. I recently put cap,
rotor, plugs, and wires on the van but this
did not help. Thanks for any advice, Mark
Answer: Code 225 knock sensor
signal not detected would indicate the knock
sensor is not functioning. Replacing it
should fix your problem.
Question:
2002 Dodge Caravan mileage: 32,000.
"Service Engine" light came on. Using
the "ignition switch off to on 3 times and
count..." method, I determined the
diagnostic codes to be "12" and "21".
I saw from the previously asked questions
that "12" simply means I'm "ready to read
the code". Can you tell me what the
"21" code references? Thanks.
Answer: Code "21" indicates a
failed oxygen sensor.
Question:
1999 Buick Century mileage: 88,000. Car
suddenly stalled and continues to do so.
The service engine soon light is now on. I
checked the code and got code 4,2...parts store
won't even tell me what that indicates.
Said it could be lots of things. Can you
help? I thought it could be the MAP sensor
or the computer.
Answer:
Code 42 has to do with the electronic spark
timing circuit. There are a number
of things included in that starting with the
knock sensor, the ignition coil, the pick-up
coil and the ignition module.
Question:
2001 Ford E-150 Clubwagon mileage: 72,000.
Get a code 173 checked h.e.g.o. It was, ok
ran all other computer checks they were good, I
can't find a vacuum leak.
Answer: Try replacing the Mass
Air Flow and check for leaky fuel injectors.
Question:
1993 Olds Achieva 2.3 quad 4. it is
showing engine code 43. Could you tell me what
that is? It has a new engine with 0 miles
Answer: Code 43 is map signal,
voltage low. Check the catalytic converter
to make sure it is not plugged as it may be
causing your code 43.
Question:
1998 Mercury Tercer mileage: 105,000. The
car has a computer code of 41 for oxygen sensor
running too lean, but the car runs very rich.
I have replaced the oxygen sensor but yet the
code remains. Do you have any idea what
may cause this code to remain and not go away?
It is the only code I have in the computer so I
tried several times to erase the memory on
computer by pulling battery cables 10 minutes
and even overnight. I have also checked
the wiring on the sensor. What do you
suggest?
Answer:
Check for leaking fuel injector and excessive
fuel pump pressure.
Question:
1998 Cadillac Coupe Deville V8 4.1l mileage:
94,023. How do I activate the computer to
give me fault codes?
Answer:
Push the off and the warmer buttons on the air
conditioning controls at the same time.
Question:
1999: Pontiac Grand Prix mileage: 79,000.
My car is having problems idling, it won', It
stalls. The service engine soon light
comes on. I got the diagnostic code off
the car, it flashed code 33. I was
wondering if you could give me a hint on what
could be wrong.
Answer:
Code 33 is a map sensor problem. Check
the engine for vacuum leaks. Check the
exhaust for blockage (catalytic converter).
The map sensor may be faulty.
Question:
1994 Oldsmobile Alero mileage: 50,000. I
have a 94 Olds Cutlass Supreme with a 3.1 M
engine code. The check engine light comes
on intermittently with a code 77 (#3 EGR
solenoid). The EGR has been changed
and all connections checked. I don't see any
carbon or anything which could have held it
open. Is there anything I should look for?
Answer:
Check for exhaust gas and or a plugged exhaust
passage to the EGR valve. If the valve
does not sense exhaust pressure, it will give
you a code 77.
Question:
1998 Ford F250 mileage: 120,000. Thanks for
any help. I will try to be specific.
I purchased the truck about a month ago.
The "check engine" light comes on after being
driven for 5 or 10 miles from a cold start.
EEC-IV codes were checked: Key On Engine
Off test gives a code of 11 (system pass).
Continuous code (stored memory) issues 41
(system indicates lean) and a 34 (EVP voltage
above closed limit). I have recently
replaced the EGR valve, the EVP sensor, and the
oxygen sensor in an effort to correct this
problem with no success. Sometime before
that, the MAP sensor was replaced. The
condition of the spark plugs and the engine
temperature gauge do not indicate that the
mixture is lean, at least not severely. I
set the timing (SPOUT shorted) to 10 degrees
BTDC. Except for this warning light, the
motor seems to be running pretty smooth.
It has an automatic transmission (no overdrive)
and air conditioning. Any help would be
greatly appreciated.
Answer:
Check the fuel pump pressure and replace the
fuel filter if not recently done. Try
injector cleaner if the problem persists replace
your Mass Air Flow Sensor. The fuel
injectors may need to be replaced.
Question: 2004 Chevy s10,
miles: 78,000. The truck was purchased for our
son has new engine and new carburetor. The check
engine light is on and the code reads 41 and 24
we know the speed sensor but what could the 41
be for it is not in the book? We had someone
look at it and he mentioned distributor
reference voltage and hall effect something
called HEI. Make some suggestions please and if
you're wondering I am not the one doing the work
thank goodness.
Answer: Replacing the coil pack with
a new unit will probably solve your problems.
Question:
2005 Ford Ranger, mileage: 39,800. The check
engine light came on in the truck. I popped the
hood, looked at it, and saw that this thing had
come disconnected, which is located next to
where you pour the oil in. (Sorry for my lousy
description, I don't know what it is.) So, I
reconnected it, but the check engine light
remained on. I took it to the dealership today
and they said the oxygen sensor had gone out,
plus I needed to have the fuel injectors
cleaned, desludged and replace the fuel filter.
I went ahead with the oxygen sensor replacement,
but have to wait on the rest because of the cost
involved. I was wondering, if you fix whatever
it is that makes the check engine light come on,
will it automatically go off or does a mechanic
have to flip a switch?
Answer:
No the light does not automatically go off. Only
the OBD II scanning system can reset the MIL
(malfunction indicator light, more commonly
known as check engine light.)
Question: 2004 Pontiac
Aztec, mileage: 39,000. It has a habit of dying
when she comes to a stop. It starts right back
up and idles fine. I changed the fuel filter two
months ago and it ran fine until a week ago. At
the time I changed the filter I checked for
codes and had none. Now I have a code 3. What
that code is I'm not sure the engine is a
muti-port fuel injected engine. This all happens
when the car is fully warmed up. Any ideas?
Answer: Try servicing
the fuel injection. Clean the carbon deposits
from the throttle bore and idle passage. Replace
the Mass Air Flow Sensor and the problem will be
solved.
Question: 1999 Dodge
Pickup, mileage: 57,000. The check engine light
came on so I took the pickup to the dealer and
they reset it. They said the purge control
solenoid was the problem. The light came on
again a few days later. Is there a way I can
reset without taking back to a mechanic?
Answer: It sounds like
the dealer missed the problem. Return to the
dealer and insist on fixing it right. Note: Only
the OBD II scanner system can reset the MIL
(check engine light).
Question:
I have been to the shop twice for the check
engine light coming on. $70 bucks a shot. Each
time it was an OČ sensor, first one before the
catalectic converter then the one after went.
Now the lights are on again. (1995 4.0 Ford
Ranger extended cab.)
Answer:
Your truck's computer controlled engine
management system will "light" the check engine
light and store a fault code for the Oxygen
sensor when there is a problem. This may occur
if the fuel mixture is too lean or too rich and
beyond the adjustment limits of the computer.
For example, a vacuum leak or plugged fuel
filter may cause a lean condition. Excess fuel
pressure from a failed fuel pressure regulator
would result in a rich condition. Check and
correct any of these or similar problems, i.e.
leaking intake manifold gaskets, severely
plugged air filter, incorrect location of vacuum
lines. The oxygen sensors may be okay.
Question: I have a
1998 Pontiac Transport Van with a 3.1 engine. I
replaced a dead battery, and now need to know if
there is any kind of special start-up procedure
to follow to reset any computer components.
Answer:
Yes, you must drive your car 40 miles to reset
system monitors.
Question: I have a
1994 Cadillac coupe Deville, 4500 liter engine.
I am using the onboard computer system, and
getting error codes: 21, 26, 44, 52, & 60. If
you can tell me what these error codes mean, or
where I can find a manual telling me I would
greatly appreciate it.
Answer: Error Codes:
21 - Throttle position sensor on high voltage
side.
26 - Throttle position sensor shorted.
44 - Lean exhaust indication.
52 - ECM Memory reset in indicator
60 - Transmission not in drive.
Question: I recently
replaced the air intake on my car with a after
market model, and during the installation, I
started the car without the Mass Air Sensor wire
installed. Now, my check engine soon light is
on, and I was wondering if there is any way to
reset this.
Answer: The malfunction
indicator light cannot be reset without an OBD
II scanner tool. Your local automobile mechanic
should be able to reset.
|