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Can a exhaust leak near an 02sensor on a 1999 bonneville cause lack of power

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  • Cars & Trucks Master
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A bad 02 sensor will cause lack of power

Posted on Nov 14, 2014

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6ya6ya
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Posted on Jan 02, 2017

MOTORWIZJ
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SOURCE: power steering leak

sounds like it just might be the high pressure hose o-ring at the pump, it's a super cheap part but can be a pain to replace .. jay

Posted on Feb 02, 2012

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Why would fire be shooting from exhaust were exhaust manifold meets exhaust When iI'm trying to start


First of all why do you have them taken apart there. If you didnt take it apart then this needs to be repaired first. Any leaks coming from exhaust before the o2 sensors will cause fuel dumping or lack of. This is causing low back compression also

Sep 29, 2015 | 1999 GMC Envoy

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Code 171 on 1999 grand prix gxp


Possible causes
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
If I were you ,I would try some fuel injector cleaner in your gas tank. Most of the time that code comes on for dirty injectors.

Mar 22, 2015 | Cars & Trucks

1 Answer

Can a exhaust near the o2 sensor on a 1999 Bonneville cause lack of power


It is very possible that there will be a lack of power. Check that the cat converter is in good condition as they break up and block the exhaust. A faulty o2 sensor will also cause a lack of power as it sends the wrong signal to the ECM to keep the mixture right.

Nov 14, 2014 | Cars & Trucks

2 Answers

I have 1998 Pontiac Bonneville 6 cylinder, I went Advance Auto because my check engine light came on and they told me it was PO171,Bank one system too lean. Yesterday, I use Seafoam and flush the fuel...


chances are the 02sensor needs replacing,the bank 1 is the exhaust system that cylinder 1 is on the motor and is threaded in the exhaust system.

Sep 16, 2011 | 1998 Pontiac Bonneville

1 Answer

I have a 1999 Pontiac Bonneville SE with 155000 miles on it. I am using about a pint of power steering fluid every two weeks. What could be causing the problem and how do I fix it? If you have pictures...


You have a leak somewhere. Clean all the system hoses and the pump and rams. Start car, Get someone to work thet steering and check everything for leaks. Oil seals on the pump can leak when worn.

Jul 26, 2011 | 1999 Pontiac Bonneville

1 Answer

I have a 1999 Pontiac Bonneville SE that is leaking power steering fluid. I am using about a pint every seven to ten days ( depending on how long the car sets). The car has 155,000 miles. What could be the...


Look at all the hose connections. The leaking one will be wet with fluid and will attract a lot of road dirt. Usually a loose clamp will cause the leak.

Jul 26, 2011 | 1999 Pontiac Bonneville

1 Answer

Petrol fumes comming from rear of car had a new pump fitted early last year fumes drift inside as well


may have a bad 02sensor, check engine light on? it should be. do you have a leak in your exhaust system? can be dangerous in closed spaces. make sure the petrol is'nt leaking out of the tank please!! also check all the petrol lines to engine. may have a small leak.thank you for choosing fixya.com

Nov 28, 2010 | 1999 Daewoo Nubira

1 Answer

1999 lincoln town car trouble code P1151--I have the service engine light on and it seems to have a rough idle like the fuel injectors are not giving it enough gas I have a code description but I don't...


check the HEGO sensor (upstream) first. Check for a broken wire in the harness to the sensor. Good luck. The HEGO sensor in in the exhasut system just past the exhaust manifold.
The downstream sensor is not so important.



P1151 - Lack of HO2S-21 Switch, Sensor Indicates Lean A HEGO sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when fuel control system no longer detects switching for a calibrated amount of time. See Possible Causes for DTC P1130

P1130 - Lack of HO2S-11 Switch, Fuel Trim at Limit The HEGO Sensor is monitored for switching. The test fails when the HO2S fails to switch due to circuit or fuel at or exceeding a calibrated limit.
  • Electrical:
    • Short to VPWR in harness or HO2S
    • Water in harness connector
    • Open/Shorted HO2S circuit
    • Corrosion or poor mating terminals and wiring
    • Damaged HO2S
    • Damaged PCM
  • Fuel System:
    • Excessive fuel pressure
    • Leaking/contaminated fuel injectors
    • Leaking fuel pressure regulator
    • Low fuel pressure or running out of fuel
    • Vapor recovery system
  • Induction System:
    • Air leaks after the MAF
    • Vacuum Leaks
    • PCV system
    • Improperly seated engine oil dipstick
  • EGR System:
    • Leaking gasket
    • Stuck EGR valve
    • Leaking diaphragm or EVR
  • Base Engine:
    • Oil overfill
    • Cam timing
    • Cylinder compression
    • Exhaust leaks before or near the HO2S(s)
A fuel control HO2S PID switching across 0.45 volt from 0.2 to 0.9 volt indicates a normal switching HO2S.

Oct 23, 2010 | 1999 Lincoln Town Car

1 Answer

1999 Ford Explorer with V6. Check engine light is on and code 1151 comes up when reader is put on vehicle. What are the most likely causes? What should I be checking?


DTC P1151 - Lack of HO2S-21 Switch, Sensor Indicates Lean

A Heated Exhaust Oxygen (HO2S) sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.

Symptoms: You will likely not notice any drivability problems.

Causes: A code P1151 may mean that one or more of the following has happened:
Electrical:
* Short to VPWR in the harness or HO2S
* Water in the harness connector
* Open/shorted HO2S circuit
* Corrosion or poor mating terminals and wiring
* Damaged HO2S
* Damaged PCM

Fuel System:
* Excessive fuel pressure
Leaking/contaminated fuel injectors
Leaking fuel pressure regulator
Low fuel pressure or running out of fuel
Vapor recovery system

Induction System:
* Air leaks after the MAF
* Vacuum Leaks

PCV system:
* Improperly seated engine oil dipstick

EGR System:
* Leaking gasket
* Stuck EGR valve
* Leaking diaphragm or EVR

Base Engine:
* Oil overfill
* Cam Timing
* Cylinder compression
* Exhaust leaks before or near the HO2S(s)

Possible Solutions: See the above list of causes and go from there.

Hope helps (remember comment and rated this).

Jul 19, 2010 | 1999 Ford Explorer

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