1988–95 MODELS
Listings of the trouble for the various engine control system covered in this manual are located in this section. Remember that a code only points to the faulty circuit NOT necessarily to a faulty component. Loose, damaged or corroded connections may contribute to a fault code on a circuit when the sensor or component is operating properly. Be sure that the components are faulty before replacing them, especially the expensive ones.
Fig. 1: ALDL connector — 1988–92 models
The Assembly Line Diagnostic Link (ALDL) connector or Data Link Connector (DLC) may be located under the dash and sometimes covered with a plastic cover labeled DIAGNOSTIC CONNECTOR.
SOURCE: PO179 CODE
P0179 Fuel Composition Sensor Circuit High Input. May have got some bad fuel somewhere. I would erase your codes and see if it comes back. If it does I would take your vehicle to the stealership to have it diagnosed a little further. Thanks for using fixya.
Sincerely,
IC
SOURCE: I have a 93 Chevy Suburban 1500 and the
yes just change out the tail shaft the electric speed o into the older one i just changed out a 84 to a 93 trans very easy
SOURCE: how do i retrieve codes? check engine light is on.
either google the code or go to the dealer and have them use the reference guide for you vehicle. most dealerships have a huge collection of reference books that goes back years and years
SOURCE: How do you reset the check engine light?
If you have the problem resolved try disconnecting the battery for 3 minutes then reconnect, if it still stays on then you will need to go to Auto-zone to have them run diagnostic test for the truck once you have pulled the codes then select clear codes then reset the computer with scan tool. This is a free service from AutoZone. Be sure to write down all trouble codes so that it can be looked at later if it does not work. Then if it does not stay off post the trouble codes here so it can be diagnosed.
SOURCE: I have a 2002 Chevy
Basically this means that the the car's computer has
detected that not all
of the engine's cylinders are firing properly.
A P0300 diagnostic code indicates a random or multiple misfire. If
the last digit
is a number other than zero, it corresponds to the cylinder number
that is misfiring.
A P0302 code, for example, would tell you cylinder number two is
misfiring.
Unfortunately, a P0300 doesn't tell you specifically which cylinder(s)
is/are
mis-firing, nor why.
Symptoms may include:
A code P0300 may mean that one or more of the following has happened:
Possible Solutions
If there are no symptoms, the simplest thing to do is to reset the
code and
see if it comes back.
injector(s)
If there are symptoms such as the engine is stumbling or hesitating,
check
all wiring and connectors that lead to the cylinders (i.e. spark
plugs). Depending
on how long the ignition components have been in the car, it may be a
good
idea to replace them as part of your regular maintenance schedule. I
would
suggest spark plugs, spark plug wires, distributor cap, and
rotor (if applicable).
Otherwise, check the coils (a.k.a. coil packs). In some cases, the
catalytic
converter has gone bad. If you smell rotten eggs in the exhaust, your
cat converter
needs to be replaced. I've also heard in other cases the problems were
faulty
fuel injectors.
Random misfires that jump around from one cylinder to another (read:
P030x
codes) also will set a P0300 code. The underlying cause is often
a lean fuel
condition,
which may be due to a vacuum leak in the intake manifold or unmetered
air getting
past the airflow sensor, or an EGR valve that is stuck open.
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