Question about 1995 Chevrolet Tahoe

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Can i chip or map the engine steering system?

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Yes you can do it. You need to clear the codes with a engine scanner.

Thanks for contacting Fixya

Posted on Jun 19, 2009


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Hi Fred,
There could be a number of reasons for this.

As I do not have much detail and do not know your knowledge of cars, I will explain the basic principle at work here and hopefully that might give you a clue as to what the problem might be:

In all modern cars the key fob (plastic part of the key) has a coded electronic chip moulded inside. There is a sensor just under the steering column cover, usually right next to the ignition switch. This sensor activates whenever a key is turned in the ignition switch and the sensor reads code stored in the chip in the key fob.

When all is good, the engine will start as expected as the keys code will have been programmed into the cars engine management control system and the key is recognised as a matching/authorised key. No match, the engine won't start - a very good safety feature.

Some reasons why this may give the fault you are experiencing:
  • You bought a replacement key from the Dodge Dealer, but the new key has either not been programmed into the cars engine management system or the programming was not successful
  • You bought a non-chipped key from a non-dealer and had it cut from the original, but were not aware of the need for a chipped key and the need to have the new key programmed into the management system. A non-chipped key will not work, ever unless the management system is compromised
  • There may be a fault with the sensor
  • Very unusual, but the chip in the key may have been damaged
Do you have an original spare key to try?

Hope this sheds some light on your problem :)

Ian Reid

Oct 28, 2017 | Dodge Cars & Trucks

2 Answers

Key and switch busted need to bypass security system how

Mostly the security system cannot be by-passed. It would not be much of a security system if it was easily possible. With some variations a code is recognised when the transponder in the key is in close proximity to an antenna which is in or around the steering or ignition lock and the antenna signal is sent to a black box.
When the code is recognised by the black box or ECU it generates and sends another code to the engine management ECU instructing it to switch on and the engine will then start.

Obtaining and fitting the new steering lock and keys and having the system recoded is likely to be expensive and inconvenient - it is designed that way to discourage vehicle theft and is why these days most car thefts are as a result of successfully stealing keys.

If the car is of low value it is possible to have the engine ECU decoded so it will recognise any code so the engine will start and run. In the UK the procedure is done mail order and takes about a week and costs around £100.

Jan 11, 2016 | Buick LeSabre Cars & Trucks

1 Answer

WWhat is the difference between a JTEC MAP sensor and a NGC MAP SENSOR

Jeep Truck Engine Controllers (JTEC) can be reprogrammed ,NGC would require new parts ,ie new chip and soldering , not ecconomically viable

Jun 05, 2014 | 2002 Dodge Durango

1 Answer

What is ECU and how to make the ECU programmer? How exactly is that work

Electronic Control Unit, An engine control unit (ECU), most commonly called the powertrain control module (PCM), is a type of electronic control unit that controls a series of actuators on an internal combustion engine to ensure the optimum running. It does this by reading values from a multitude of sensors within the engine bay, interpreting the data using multidimensional performance maps (called Look-up tables), and adjusting the engine actuators accordingly.

Automotive ECU is to convert stored procedures chip in simple, replace the programmed chip, as long as open the backplane of the ECU and unplug the original chip and then put the new chip , as some older E-ROM chip only can write just one time, every time you modify the program you must turn the program of original chip into a blank chip and then replace the original chip. If you want to have a program modified by yourself, you need a ecu programmer.

May 12, 2012 | Cars & Trucks

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I changed the steering calum and have a key with with a chip that works the new calum...but does not start the car. i would like to disable the anti theft system so i can get the car started

unfortunately, there is no way to disable this system because the electronic modules in your vehicle depend on a specific electronic code programmed into the chip of that original key. the best solution for this problem would be to make sure the connections inside the column are correct and have the new key programmed to work with your system. or, you can hold the original key close to the steering column while starting it with the new key in the cylinder and possibly trick the system into thinking its the right key. the downside to this method is that you will have to do it every time and you now have to keep up with both keys in order to start your engine.

May 08, 2011 | Ford Windstar Cars & Trucks

1 Answer

Need to find location of map sensor dodge

The map sensor is located on the side of the intake manifold plenum. Look to the left of the power steering fluid canister and you will see it with a 3 wire connector. Hope this will help you.

May 15, 2010 | Cars & Trucks

2 Answers

My car starts and stalls after about 2 seconds, i

There is also a possibility that its your on board car alarm. Some cars alarms will activate a kill circuit if the alarm isnt deactivated before putting key in ignition... Sometimes to get past this we will use the key alone to lock the door, then a few secs later unlock the door and try starting it... Sometimes it works. Im not saying the map sensor cant cause this as well, but its another possibility...

Jan 27, 2010 | 1997 Pontiac Grand Am

1 Answer

I have just replaced the crankshaft bearings on my Suzuki Jimny M13A and found out that when I start the engine it will not stay idle. I disconnected the sensor in front of the camshaft and it stays idle...

dude your electronic ignition system has gone bust... you will have to replace the engine mapping chip, but good luck finding it... I tried to no avail.

Tell me if you get it though.. Goodluck :)

Apr 22, 2009 | Suzuki Samurai Cars & Trucks

2 Answers

What are the diag codes for my 2005 sonata, 6 cyc. motor, the check engine lite comes on

Hyundai Specific Trouble Codes Code Description P1100 Manifold Absolute Pressure (MAP) Sensor Malfunction (Open/Short) P1102 Manifold Absolute Pressure (MAP) Sensor Malfunction - Low Voltage P1103 Manifold Absolute Pressure (MAP) Sensor Malfunction - High Voltage P1147 ETS Sub Accel Position Sensor 1 Malfunction P1151 ETS Main Accel Position Sensor 2 Malfunction P1155 ETS Limp Home Valve P1159 Variable Intake Motor Malfunction P1171 Electronic Throttle System Open P1172 Electronic Throttle System Motor Current P1173 Electronic Throttle System Rationality Malfunction P1174 Electronic Throttle System #1 Close Malfunction P1175 Electronic Throttle System #2 Close Malfunction P1176 ETS Motor Open/Short #1 P1176 ETS Motor Open/Short #2 P1178 ETS Motor Battery Voltage Open P1330 Spark Timing Adjust Malfunction P1521 Power Steering Switch Malfunction P1607 Electronic Throttle System Communication Error P1614 Electronic Throttle System Module Malfunction P1632
Go to this page for generic codes that are for all OBD 2 systems

Aug 29, 2008 | Hyundai Sonata Cars & Trucks

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