Question about Pontiac Bonneville

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Pontiac Bonneville SE coming up with ODB2 scanner codes P0301 and P0440

Looking at the car to see if it's worth buying to fix up and use or not.

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  • Becca Webber Feb 19, 2012

    I bought the car but about an hour of normal driving and the engine gets hot between 200-250 then it starts dropping back down then up and while it's doing that it starts blowing cold air from the heater; I put the car in neutral -turn ignition off and back then it returns to blowing heat.
    I replaced the thermostat, water pump and fixed the leaking gaskets.
    Could that be the intake manifold?

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2 Answers

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  • Pontiac Master
  • 17,970 Answers

Hi Becca:
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
Poor compression
Defective computer

Possible Solutions:
- 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-

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Posted on Feb 15, 2012

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  • Pontiac Master
  • 76,691 Answers

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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SOURCE: looking for fuel filter location on my 97 pontiac bonneville

It is located under the drivers side floor acessable from under the vehicle. For pics and instructions check out .http://www.pfyc.com/supportfiles/gasfilter/

Your rating is very important to me

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Posted on May 26, 2009

batviper
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SOURCE: I need a serpentine belt diagram for a 1997

0900c152800b19a9.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Fig. 8: You can use a box-end wrench on the pulley nut to rotate the tensioner ...


0900c152800b19aa.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Fig. 9: ... then remove the belt from the pulleys


0900c152800b19ab.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Fig. 10: Serpentine drive belt routing and removal - 3.8L (VIN L) engine shown, VIN C similar


0900c152800b19ac.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Fig. 11: Make sure to note the drive belt routing prior to removing it - 3.8L (VIN K) engine shown


0900c152800b19ad.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Fig. 12: Drive belt removal on a 1992-95 supercharged engine
To install:
Be sure the belt is aligned into the proper grooves of the accessory drive pulleys.

  1. Lift the tensioner, and install the belt onto pulleys. Make sure the belt is routed properly.



0900c152800b19ae.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Fig. 13: Many vehicles have a label you can check to be sure the belt is installed and routed correctly
  1. For 1996-99 vehicles, raise and safely support the vehicle. Install the engine mounting bracket lower spacer, stud and nut.
  2. For 1996-99 supercharged engines, perform the following:
    1. Attach the connector to the crank sensor.
    2. Install the right-hand splash shield, then carefully lower the vehicle.

  3. Install the belt guard or reservoir.
  4. Connect the negative battery cable.

Posted on Nov 18, 2009

Mustgo
  • 2359 Answers

SOURCE: 97 pontiac bonneville se airbag light stays on all

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)

Seat covers

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.

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Please rate my answer if it is useful to you.

Cheers,

Mustgo

Posted on Dec 16, 2009

c17hydro
  • 2984 Answers

SOURCE: how to remove radiator on 1992 pontiac bonneville

Removal & Installation

  1. Disconnect the negative battery cable.
  2. Drain the engine coolant into a suitable container.
  3. If necessary for access, remove the air cleaner, mounting stud and duct.
  4. Remove the upper fan mounting bolts.
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On some vehicles, such as this 1998 model, remove the upper fan mounting bolts
  1. Unfasten the retainers, then remove the upper radiator panel.
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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.


  1. Remove the cooling fans, as outlined later in this section.
  2. Disconnect the coolant reservoir hose from the radiator neck and the radiator hoses from the radiator.
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Unfasten the hose clamp and disconnect the coolant reservoir hose from the radiator neck

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Disconnect the remaining hoses from the radiator

  1. If equipped, unplug the cooling sending unit electrical connector.
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On some vehicles, you must unplug the coolant sending unit electrical connector
  1. If equipped, disconnect the engine oil cooler lines from the radiator.
  2. If equipped with an automatic transaxle, disconnect the transaxle cooler lines from the radiator side tank.
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Use a flare nut wrench to disconnect the upper transaxle oil cooler line

Posted on Jan 18, 2010

  • 67 Answers

SOURCE: looking for the air conditioning relay on 1993 pontiac bonneville

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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