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Engine Codes 4801 and 4901 Show - 2002 Volvo S60

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99 Silverado engine light on cannot get a code from odb reader

Does the code reader power up ? Does a message no communication show on the screen ? Is there B+ voltage at pin 16 in the DLC ? If all that is good try a auto parts store ,they check codes for free .

Jun 10, 2017 | 1999 Chevrolet Silverado 1500

1 Answer

What is the P0234 code on my 2005 pt criuser

P0234 over boost condition has occcurred. press the helpful button
The symptoms displayed for a P0234 code will depend on the cause of the overboost condition: The service engine soon or check engine light will illuminate. You will experience a loss of power. The engine may show signs of overheating. The transmission may show signs of overheating and harsh shifting. Additional codes associated with the condition set by P0234 may be present to help identify the cause. Codes are available for all electrical components utilized by the engine management computer for the control of boost levels. The engine may display signs of pre-ignition in the form of knocking. The engine may display ignition misfiring.
Read more at:

P0234 Turbocharger Supercharger Overboost Condition Code

VAG 2 0 TDI turbo P0234 overboost cause

P0234 OBD II Trouble Code

Feb 04, 2016 | 2005 Chrysler PT Cruiser

2 Answers

It shakes in drive when stopped at a light or stop sign

Check compression plugs and leads for faults,check inlet manifold gasket not blown check vacuum hoses.

Jul 09, 2015 | 2001 Nissan Sentra

1 Answer

My 1991 Ford f-350 truck has a new engine which after it warms up will show the "check engine" light and idle at about 300 rpm too high in both drive and park. I suspect that a sensor is going out but not...

You will need to get the procedure to check the engine computer for trouble codes. You can use the check engine light to find the codes by jumpering the test plug in the engine compartment.
Look online for "retrieve trouble codes" for your year of truck. Then look for the test procedures for the codes you get.

Feb 22, 2015 | Ford Cars & Trucks

1 Answer

I have a 2002 galant and error codes p0335 & p0340 keep coming up. I changed the sensors and had autozone erase the codes but after I turned engine off and started again the codes came back up! Has...

some vehicles set these codes when ignition is turned on but engine not running,
but then goto a not pressent code(history code) or no code present, when engine is running. This may be the way the system works, which with genuine scanner it may
show this but with some aftermarket scanners may only show that the code sets,
not what its status is or if its gone, it remains displayed.
So you could clear codes, engine not running, cycle ignition and if code comes back again without starting engine this is normal for this system (NO FAULT).
If it only sets again when engine has run,
is cam timming correct?
teeth on reluctor wheel all o.k. bent or dammaged?
or debris stuck to reluctor wheel?
Earth circuit could be shared with both sensors is it ok? -repair wiring or bad earth.
low Ohms reading test from sensor connector.
Is power to sensor circuit uninterupted & ok? -repair wiring

Oct 01, 2011 | 2002 Mitsubishi Galant

1 Answer

Service engine soon light is on does not show any codes what could it be

The service engine light should only come on when the PCM detects a fault in one or more of the systems it controls. It should also store codes.
If a simple code reader was hooked up to read the codes perhaps the code reader is only good for the generic codes and your PCM has model specific codes stored in it. Some code readers cannot read those codes. A shop scanner may be needed to get codes.

Sep 25, 2011 | 2004 Chevrolet Monte Carlo

2 Answers

Ecu computer doesn't show codes but engine stalls when accelator is pressed

if there are no codes and the engine is stalling when applying the gas then you either have a bad fuel filter or a bad fuel pump. i recommend first replacing the fuel filter it is a cheap and easy fix. good luck

Feb 06, 2011 | 1993 Nissan Pathfinder

1 Answer

I have a 91 Buick century 3.3l that is reading out check engine codes 12,26,27,44. I can't find a chart anywhere that tells me what the codes mean. Can you help me out? Thanks, Joe

I'll try and help with a few of your codes, code 12, will show if the diagnostic term is grounded to access codes, it will show any time that is done and the engine not running, all other codes will show after. The 26, 27 codes have to do with the engine over heating or a coolant sensor. #44 has to do with you Ox sensor, indicates a lean running condition. Pos. due to engine running hot. .

Oct 08, 2010 | 1991 Buick Century

1 Answer

Show engine error codes on display 2006 Cadillac CTS

Unfortunately not. This vehicle has a very sophisticated CPU and the old age tricks will not work on this particular design. You will need to gain access and allow a professional GM tech to pull the Cadillac codes. An ordinary code reader may miss the exclusive Cadillac codes that may be stored at any given time.

A certified GM/Cadillac code reader will be your best bet..

Mar 15, 2010 | 2006 Cadillac CTS

1 Answer

Check engine light

Go here and it will tell you how to get your codes. Actually on an 06 you can just turn the ignition on and off 3 times (dont crank the engine) and the codes will show up on your odometer. But here are all the codes. PS you can get a manual on for free too.

P0191 Fuel Rail Pressure Sensor Circuit Performance

May 04, 2009 | 2006 Dodge Ram

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