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Scanned vehicle code po523 appered and will not start

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My 04 Chevy Monte Carlo Has a check engine Light on..I place it on The Obd2 ..But No codes are showing...What could it be.. I thought maybe start with the Plugs..


Start with a proper diagnostic scan using a quality scan tool. Cheap scan tools may not communicate with the various modules in the vehicle and therefore will not display a code. Don't toss parts unnecessarily at the vehicle until you properly scan and retrieve the stored codes and then repair from there

May 27, 2016 | Cars & Trucks

1 Answer

2006 gmc canyon will not go into 4 wheeldrive after 5 minutes of driving


The first place to start is have it checked for codes an to see if a scan tool will communicate with the 4X4 control module !
Diagnostic Starting Point - Transfer Case
Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic System Check will provide the following information:
?€¢
The identification of the control module or modules that command the system.


?€¢
The ability of the control module or modules to communicate through the serial data circuit.


?€¢
The identification of any stored diagnostic trouble codes (DTCs) and the status of the codes.

The use of the Diagnostic System Check - Vehicle will identify the correct procedure for diagnosing the system and where the procedure is located.
Install a scan tool.
Does the scan tool power up?
Go to Step 3
Go to Scan Tool Does Not Power Up

3

  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to establish communication with all of the control modules on the vehicle. Refer to Scan Tool Does Not Communicate with Class 2 Device for the modules you should expect to observe.
Does the scan tool communicate with all of the expected vehicle control modules?
If you don't have a scan tool that will communicate with all modules on the vehicle or understand this , your best bet is to take it to a ASE certified repair shop or the dealer .

Jan 07, 2016 | 2006 GMC Canyon Crew

1 Answer

I have 2000 Chrysler town and country van that as your driving the engine will cut off. So far I have replaced the ignition wires, the spark plugs, the fuel filter and I have had fuel injection servic


You installed parts & asked for various services to be done

What you failed to do, was testing required to find your vehicle
problems

Most likely, unless your way behind or never do any Preventative
Maintenance, you didn't need all that was done,at least to fix the
cutting off issue

Have to check for OBD Codes,road test with scan tool,look
at data & component test, to find problems,not replace parts
in a wish & hope strategy

Sep 30, 2014 | 2000 Chrysler Town & Country

1 Answer

1987 Subaru EFI I replaced the fuel pump with a after market pump,engine starts will not idle,to keep running I must constantly pump gas pedal


The vehicle should be scanned for trouble codes, because there are a few sensors that could be causing the problem. If you do not know how to retrieve the codes, take the vehicle to Auto Zone or Advance Auto for the scan. They charge very little or nothing for the scan. If trouble codes do come up, it will give you an idea of what sensor may be failing.

Apr 06, 2014 | Subaru GL Cars & Trucks

1 Answer

Engine light stays on codes PO521 and PO523


Both codes are for a problem with the oil pressure sensor. The sensor and circuit would need to be checked.

Jan 23, 2014 | 2007 Chevrolet Tahoe

1 Answer

2005 Ford Escape XLT sputtering. Replaced spark plugs as codes said. The check engine light does NOT come back on. No codes to read. I've done some research and there seem to be a few common answers....


Replaced spark plugs as codes said. ???? What code ? No code tells you to replace anything with testing . Hooking up a scan tool checking checking engine sensor data pid's . If you don't know this your best bet would be to take your vehicle to a qaulified repair shop . You could have a bad sensor , Mass air flow , a bad coolant temp sensor . Fuel system problem , fuel pressure an flow testing should be done . What are the O2 sensors doing ? are they switching from 0.2 to 0.9 millivolts ? What the fuel trims at ? Is the computer adding or subtracting fuel ?

047 Engine Hard to Start or No Start Scan Data for Ignition
048 Engine Hard to Start or No Start Scan Data for Starting Problems
There is a lot involved in diagnosing these computer systems , and guessing doesn't fix vehicle running problems .

Jun 12, 2017 | Cars & Trucks

1 Answer

Code # Po523 comes up when we got the code . What is it? Thank You


This codes indicates high voltage at the oil pressure sending unit. You will have to have the sending unit replaced.

Sep 22, 2011 | 2002 Jeep Liberty

2 Answers

I have a 2004 rangerover hse the last model bmw made. It was sitting for about 2months when i went to start it i noticed the left front was not moving then the left front wheel sensor was bad (thats what...


first up get advice from accredited professionals--relations are seldom qualified to help
have the fault codes read to determine where the faults are to eliminate guessing and wasting money
ECM rarely go bad but the CPU program can be corrupted from removing the battery or letting it sit flat battery
That problem can be fixed using the same scan tool the reads the fault codes

May 07, 2017 | 2004 Land Rover Range Rover

1 Answer

What to do when appers a malfunction indicator lamp in a toyota camry 1994 it ocurs while i was driving and still there


it means that a fault has occured in the electronic engine controls, you will need the system scanned, there will be a fault code in the control computers memory

May 07, 2010 | 1994 Toyota Camry

1 Answer

I have the following fault codes reading


P0216 - injector timing control circuit

P0234 - turbo / supercharger over boost condition

P0523 - engine oil pressure sensor / switch circuit high inout.

Jan 22, 2010 | 1998 Dodge Ram 3500 2WD

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