Question about 1995 Chevrolet Beretta

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Received gm dtc 46 code for 1995 Chevy Beretta - Left Bank Fuel Imbalance from code reader. Intermittent miss. Sometimes care runs great. Other times get the miss or rough idle.

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  • Chevrolet Master
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Left Bank Fuel Imbalance, this is caused by dirty or cracked injectors.If the injectors are clogged, then it requires to be cleaned , if its cracked or worn out,m replace the injectors.The worn out out injectors are not letting the flow of fuel to run smoothly. But if injectors checked out, then clean the IAC , the idle air control valve, the fuel injector, the o2 sensors and throttle body.The IAC is located on throttle body.Clean both the IAC and throttle body with throttle cleaner.The throttle cleaner can be easily available at local auto parts stores.Clean this parts and check.this should help. Get the fuel pressure test done.If the fuel pressure tested low, then its faulty fuel pump causing the low fuel problem.It has to be replaced.-------- This should help.Thanks.Helpmech.

Posted on Mar 27, 2011

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P0300 is a random miss fire , a vacuum leak can cause this as well as low fuel pressure ! weak fuel pump , clogged fuel filter !
DTC P0171: Fuel Trim System Lean Bank 1
DTC P0174: Fuel Trim System Lean Bank 2 These two codes are saying the PCM - engine computer is see a lean condition .
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Circuit/System Description
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You don't say what make , model an year vehicle ! These are for GM vehicles , yours could mean something else . Except the first three , those are genaric codes , same for all makes ! So can't say what this codes are P2097, and P2099 ! Can't mean this P2097 - Post Catalyst Fuel Trim System Too Rich Bank 1
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I have an 08 Saturn Astra XR. It won't come out of 1st. Throwing code p2096 post catalyst fuel trim system too lean bank 1. Put on new o2 sensor on both streams and I cleaned out mass air flow. Help?


That code wouldn't cause it not to come out of first gear . How did you retrieve this code P2096 , code reader etc.. This is an invalid code , not listed in Saturn service information . Have DTC'S check by a GM dealer , Chevy . You obviously have a transmission problem not an O2 sensor problem . Some code readers will replace a code with an other if it doesn't have the right one . Software .

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CODE CO441, P0172, P1174


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Your best bet is to take it to a ASE certified repair shop or dealer < It's going to take special diagnostic tools to trouble shoot an fix this problem .

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1995 suburban 5.7 suddenly developed an intermittent miss and now uses a lot of fuel. When it is not missing it runs great, but whether I'm accelerating or sitting at a light it will run great and the


Usually if there is no engine light it means that the problem is more likely a mechanical one. Where the problem is intermittent and when it occurs, there is an increase in fuel consumption, I believe the component will be related to air/fuel ratio. There are some common failures for this symptom, I will list some: (in the head) a weak valve spring or a bent or sticking valve, a dirty or loose cap and rotor, coil wire or spark plug wire shorting to ground, sticking or defective EGR valve, clogged air or fuel filter, excessive exhaust back pressure, or a weak or leaking fuel regulator. These are my suggestions. As always you will need to run some tests and inspect as much as you can. The more you find whether it is good or not, the more you will know. With this new information, it will get you even closer to the cause. Please let me know if you have other questions and any progress that you are making, good luck.

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1 Answer

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Possible Causes:


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1 Answer

I have a 2006 Chevy Colorado..Check engine light on and code 171 came up. Oxygen sensor replaced as was gas cap..Still on..What else needs repairing to fix this??


Trouble Code: P0171

Fuel Trim Too Lean

Possible Causes:


The current cell can be observed using a scan tool.The system will go lean if an injector is not providing enough fuel.A lean condition could be present during high fuel demand due to a fuel pump not pumping enough fuel, plugged fuel filter or a restricted fuel line.Insufficient fuel in the tank or low fuel pressure may cause this DTC to set. Refer to Fuel System Diagnosis .Review the Failure Records with a scan tool. If an intermittent condition is suspected, refer to Intermittent Conditions .

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1 Answer

I have a 1997 Chevy Blazer with the 4.3 engine. The Service Engine light keeps coming on. I scanned the codes and replaced the O2 sensor just before the catalytic converter. The light is still coming on...


P0146 pd means pending code
Pending codes and DTCs? Posted on November 12, 2010 by fcrmaster
When reading codes from your vehicle the fault code reader may show them as pending codes or normal Diagnostic Trouble Codes (DTC).
Pending codes (also known as continuous monitor codes) will be registered when an intermittent fault occurs. If that fault does not happen again after x number of start/stop cycles, the ECU will erase the code from memory. If the fault is persistent it becomes a DTC.
If you have read pending codes it is advisable to check the codes again after a week or so. If there is no apparent problem with the vehicle it is safe to erase the codes too and check back. But always make a note of any fault codes with the date and mileage of a vehicle.
If the codes read include a DTC then you need to investigate further. This you can either do yourself or advise your garage. If, again, you don't see an apparent problem (depending n the severity of the code) with the vehicle you can note the codes down and erase them. Then check again after a week or a few days depending on how often the vehicle gets used. If a repair has been made (previous owner) the DTC may just not have been reset after the repair.
The other numbers behind the code 01/06 , 02/06, 03/06 , 05/06 ,04/06 These don't mean anything . cheap code reader .
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DTC P0146 HO2S Circuit Insufficient Activity Bank 1 Sensor 3
DTC P0171 Fuel Trim System Lean Bank 1
DTC P0174 Fuel Trim System Lean Bank 2
Sorry but this is something you should take to a qualified repair shop that has a diagnostic tool that can view sensor scan data.
Causes of lean condition trouble codes P0171 P0174 GM 5 3L

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