How do i reset the computer after a repair has been made?

Did you do a complete OBD code-clear of the computer?
Codes don't reset just because you fix the problem. Many of the codes need to be cleared using a OBD machine - buy it at Auto repair places for about $60. You also have to disconnect the battery for a minute to reset some of the codes.
If the codes don't come back, you are good. If they reset again, you still have a problem.

DTC P1114Circuit Description

The engine coolant temperature (ECT) sensor is a variable resistor, that measures the temperature of the engine coolant. The powertrain control module (PCM) supplies 5 volts to the ECT signal circuit and a ground for the ECT low reference circuit. When the ECT is cold, the sensor resistance is high. When the ECT increases, the sensor resistance lowers. With high sensor resistance, the PCM detects a high voltage on the ECT signal circuit. With lower sensor resistance, the PCM detects a lower voltage on the ECT signal circuit. If the PCM detects an excessively low ECT signal voltage, which is a high temperature indication, DTC P1114 sets.
Conditions for Running the DTC

The engine run time is more than 5 seconds.
Conditions for Setting the DTC

The PCM detects an intermittent high ECT sensor temperature while the engine is running, and the run time exceeds 5 seconds.
Action Taken When the DTC Sets

• The control module stores the DTC information into memory when the diagnostic runs and fails.
• The malfunction indicator lamp (MIL) will not illuminate.
• The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
• The driver information center, if equipped, may display a message.

Conditions for Clearing the DTC

• A current DTC Last Test Failed clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
• Clear the DTC with a scan tool.

Diagnostic Aids

• An ECT sensor or PCM which is intermittently shorted, open, or skewed is possible, yet very unlikely.
• An intermittent short to ground in the ECT sensor signal circuit could result in a DTC P1114. If the low ECT voltage, or high temperature, reading is present, additional sensor circuit voltage codes could be set. Refer to any non-intermittent DTCs that are set.
• Test the coolant sensor at various temperature levels in order to evaluate the possibility of a skewed sensor. A skewed sensor could result in poor driveability complaints. Refer to Temperature vs Resistance .
• If an intermittent condition is suspected, refer to Intermittent Conditions .

Test Description

The number below refers to the step number on the diagnostic table.

1. If there are no driveability complaints associated with this DTC, and if the DTC does not reset, the system is OK.
   

Step
Action
Yes
No
Schematic Reference: Engine Controls Schematics
1
Did you perform the Diagnostic System Check-Engine Controls?
Go to Step 2
Go to Diagnostic System Check - Engine Controls
2

1. Install a scan tool.
2. Turn ON the ignition.
3. Start the engine.

Does the scan tool indicate that DTC P0117 also failed?
Go to DTC P0117
Go to Step 3
3

1. Turn ON the ignition, with the engine OFF.
2. With a scan tool, observe the ECT sensor temperature while moving the sensor connector and the PCM connector.

Does the scan tool indicate an abrupt change in value?
Go to Step 6
Go to Step 4
4

1. Turn ON the ignition, with the engine OFF.
2. With a scan tool, observe the ECT sensor temperature while moving the wiring harness at the sensor and the PCM.

Does the scan tool indicate an abrupt change in value?
Go to Step 7
Go to Step 5
5

1. Observe the Freeze Frame/Failure Records for this DTC.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Operate the vehicle within the Conditions for Running the DTC, or within the parameters observed in the Freeze Frame/Failure Records.

Does the DTC reset ?
Go to Diagnostic Aids
System OK
6
Repair the connector or terminal as necessary. Refer to Circuit Testing , and to Connector Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 8
--
7
Repair the harness or wiring as necessary. Refer to Circuit Testing , and to Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 8
--
8

1. Use the scan tool in order to clear the DTCs.
2. Turn OFF the ignition for 30 seconds.
3. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?
Go to Step 2
Go to Step 9
9
With a scan tool, observe the stored information, Capture Info.
Does the scan tool display any DTCs that you have not diagnosed?
Go to Diagnostic Trouble Code (D

how do i reset the computer in my 1999 volkswagon beetle.changed both oxygen sensors.light still on.do you know the sequence

P0118 for Volkswagen - (ECT) Engine Colant Temperature Circuit High

Symptoms:- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes:
(Inspect the following... Repair/Replace if necessary)
- Low engine coolant level
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
- Faulty Engine Coolant Temperature (ECT) sensor
- Faulty engine coolant thermostat

P0118 VOLKSWAGEN Description: The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the (ECM) as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
When is the code detected?:When an excessively high voltage from the sensor is sent to ECM.

I hope this helps! Let me know if you need further assistance.

Vehicles: all computer-controlled internal compustions engines equipped with an IAT (Intake Air Temperature) sensor

Intake Air Temperature (IAT) Sensor

Operation - IAT

This sensor is a resistor based sensor which detects the intake air temperature. According to the intake air temperature reading the ECM/PCM will control the necessary amount of fuel injection.

ECM = Engine Control Module (aka "the car's computer")
PCM = Powertrain Control Module (aka "the car's computer")

Did you reset the Computer after you did the repair? After you replace a sensor that has stored a fault code you need to reset the computer in the car to clear the stored codes. Auto Zone or O'Rielley's may do it for you or try removing the Negative battery terminal for 60 secs.

P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control
This means that the engine coolant temperature (ECT) sensor indicates that the engine
has not reached the required temperature level to enter closed-loop operation within a specified amount of time after starting the engine.

A code P0125 may mean that one or more of the following has happened:

• Insufficient warm up time
• Low engine coolant level
• Leaking or stuck open thermostat
• Faulty coolant temperature sensor

The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is likely going to be the result of the above causes (faulty thermostat, faulty coolant sensor, or a low coolant level).

unplugging the battery usually does the reset... leave it unhooked for a longer time

This happens when the Engine Coolant Temperature (ECT) does not reach 75°C (167°F) despite sufficient engine warm-up time.

This happens usually when the thermostat/temperature sensor is faulty, and is bad for emissions and fuel consumption.

The repair cost may vary, even if themperature sensor is not an expensive part, after replacing the sensor there is need to reset the ECU (car computer module).

this is the coolant temp sensor, it sends a signal to the engine ECU
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this is the temp sending unit. it sends a signal to the gauge on the instrument panel.
this is what you need to get to fix your temp gauge.