Engine starts no other electrical works lights ect.

P0119 Cadillac Engine Coolant Temperature Circuit Intermittent
Possible causes - Low engine coolant level
- Faulty Engine Coolant Temperature (ECT) sensor
- Faulty engine coolant thermostat
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection What about the obd code? The Engine Control Module (ECM) detected an erratic signal from the engine Coolant Temperature (ECT) sensor during the system monitor test Symptoms - Engine Light ON (or Service Engine Soon Warning Light) P0119 Cadillac 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.
P119 or P0119 ?

P119 - Shorted Fuel Injector Problem
or

check the starter and ignition fuse. starter fuse is located in the fuse box in your engine bay, ignition fuse is located in the kick panel which is right under your steering wheel.

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.

P0103 - Mass or volume air flow circuit high input.

Symptoms: Engine stalls, running rough, excessive fuel consumption, excessive smoke from the tail pipe, check engine light on.

Possible Causes: Dirty mass air flow sensor, dirty mass air filter, mass air flow sensor harness is open or shorted, mass air flow sensor electrical circuit poor connection, intake air leaks, faulty mass air flow sensor.

P0116 - Engine coolant temperature circuit range/performance.

Symptoms: Check engine light on.

Possible Causes: Low engine coolant level, ECT sensor harness open or shorted, ECT electrical circuit poor connection, faulty engine coolant temperature sensor (ECT), faulty engine coolant thermostat.

Coolant Temperature Sensor I would take the vehicle back to where it was serviced and try to ask them about what may have gone wrong to cause this problem.
The Intake Air Temperature sensor should also be checked.

The following is the procedure for servicing the coolant temperature sensor: Removal & Installation 3.8L Engine To Remove:

1. Drain the coolant.
2. Disconnect the engine coolant temperature (ECT) sensor connector. ECT sensor 3.8L
   
   
3. Remove the ECT sensor.

To Install:

1. Apply thread sealer P/N 12346004 or equivalent to the engine coolant temperature (ECT) sensor threads.
2. Install the ECT sensor. Tighten 18 ft-lb (25 Nm).
3. Connect the ECT sensor harness connector.
4. Fill the cooling system.

5.3L Engine To Remove:

1. Drain the coolant below the level of the engine coolant temperature (ECT) sensor.
2. Disconnect the ECT sensor electrical connector. ECT sensor 5.3L
   
   
3. Remove the ECT sensor from the cylinder head.

To Install:

1. Clean the threads in the sensor mounting hole.
2. Apply sealer P/N 13246004 or equivalent to the threads of the sensor.
3. Install the sensor and tighten 15 ft-lb (20 Nm).
4. Connect the ECT sensor electrical connector.
5. Fill the cooling system and check for leaks.

Removal & Installation To Remove:
ECT sensor 3.5L engine

1. Disconnect the battery ground cable.
2. Drain the coolant below the level of the engine coolant temperature (ECT) sensor.
3. Disconnect the ECT sensor electrical connector.
4. Carefully remove the ECT sensor.

To Install:
WARNING
Damage to the coolant sensor will affect the operation of the fuel control system.

1. Coat the ECT sensor threads with thread sealer.
2. Install the ECT sensor. Tighten the sensor to 15 ft lb (20 Nm) on 3.5L engines and 22 ft lb (30 Nm) on 3.8L engines.
3. Install the ECT sensor electrical connector.
4. Connect the battery ground cable.
5. Refill the cooling system using the recommended procedure.

You may have hooked it up backwards, Left off your main power line, or blew the inline fuse (on the main powerline.

CODE 15 - Engine Coolant Temperature (ECT) Sensor Circuit (Low Temp.)
It's no surprise that your mileage was affected, damage to the ECT sensor will affect proper operation of the fuel injection system.


REMOVAL

1. Relieve engine coolant system pressure.
2. Turn ignition to "OFF".
3. Disconnect electrical connector.
4. Carefully back out ECT sensor.

INSTALLATION

1. Coat threads (only) with sealer.
2. Install sensor in engine, torque to 30 N-m (22 lb.ft.).
3. Connect electrical connector.
4. Refill lost coolant.

Above the Relay Panel is the Auxiliary Relay Panel. Has thirteen positions in it.
6 across the top, 7 across the bottom.

Across the bottom the Glow Plug Relay is the fourth one over from the left. It is Number 10.
(180)

the check engine light you are getting sounds like and electrical problem, have the battery and the alternator tested, and have autozone or the like pull the codes off for you and see if you can figure out what they are....