Question about Pontiac Bonneville
Looking at the car to see if it's worth buying to fix up and use or not.
P0301 Code - Cylinder #1 Misfire Detected
A P0301 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #1.
Symptoms may include:
the engine may be harder to start
the engine may stumble / stumble, and/or hesitate
other symptoms may also be present
A code P0301 may mean that one or more of the following has happened:
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
- If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
- 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.
P0440 Code - Evaporative Emission Control System Malfunction
This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
You likely won't notice any drivability problems.
A code P0440 could mean one or more of the following has happened:
The gas cap is not installed or working properly
The purge solenoid has failed
The canister is plugged and not working properly
With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
Inspect the EVAP system for cuts/holes in tubes/hoses
Inspect for damaged or disconnected hoses around the Evap purge solenoid
Check and/or replace the sensor
Check and/or replace the purge valve
Have a professional use a smoke machine to detect leaks
Other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456-
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Posted on Feb 15, 2012
You have a misfire on cylinder #1 (P0301)
P0440 - Evaporative Emission Control System Malfunction
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors Possible causes - Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
Posted on Feb 15, 2012
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Posted on Jan 02, 2017
It is located under the drivers side floor acessable from under the vehicle.
For pics and instructions check out
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Posted on May 26, 2009
Fig. Fig. 8: You can use a box-end wrench on the pulley nut to rotate the tensioner ...
Fig. Fig. 9: ... then remove the belt from the pulleys
Fig. Fig. 10: Serpentine drive belt routing and removal - 3.8L (VIN L) engine shown, VIN C similar
Fig. Fig. 11: Make sure to note the drive belt routing prior to removing it - 3.8L (VIN K) engine shown
Fig. Fig. 12: Drive belt removal on a 1992-95 supercharged engine
Be sure the belt is aligned into the proper grooves of the accessory drive pulleys.
Fig. Fig. 13: Many vehicles have a label you can check to be sure the belt is installed and routed correctly
Posted on Nov 18, 2009
Here's a quick check list
for most common cost of SRS / Air bag problem.
Dirty contacts on driver and passenger seat belt buckles
Dirty contacts on seat belt connectors (under seats)
Dirty contacts on driver and passenger sides weight sensors (under seat)
Weight on passenger seat
(Example: grocery package trigger SRS / Air Bag light on the way home.)
I recommend you to pass an vacuum over the contacts and use CRC electronic parts cleaner to rule out connectivity problem.
I DO NOT recommend disconnecting the negative battery connector to clean the code(s).
Without the code(s) the dealer will takes "BILLABLE" time to reproduce the problem.
Please rate my answer if it is useful to you.
Posted on Dec 16, 2009
Removal & Installation
On some vehicles, such as this 1998 model, remove the upper fan mounting bolts
Unfasten the upper radiator panel fasteners, then remove the panel
CAUTION When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old. To avoid being burned, do NOT remove the thermostat housing cap while the engine is at normal operating temperature. The cooling system will release scalding fluid and steam under pressure if the cap is removed while the engine is still hot.
Unfasten the hose clamp and disconnect the coolant reservoir hose from the radiator neck
Disconnect the remaining hoses from the radiator
On some vehicles, you must unplug the coolant sending unit electrical connector
Use a flare nut wrench to disconnect the upper transaxle oil cooler line
Posted on Jan 18, 2010
underneath the hood against the firewall there is a fuse relay panel.. the a/c compressor relay is the very first relay all the way to the passenger side
Posted on Jul 10, 2010
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