Question about 1996 Saturn SL

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Coolant temp sensor loses voltage then it returns change ECM and coolant temp sensor

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Coolant temp sensors do occasionally die - it's probably time you replaced it. It's only a $20 part so I'd try replacing it first. If you keep getting the problem, then you need to worry about your wiring harness or ECM.

The temp sensor itself can be replaced with an OEM sensor from your local auto store. Then it's just a matter of replacing the existing sensor on your block, plugging it into the connector and hoping everything works better.

I'd recommend doing this ASAP because a problem with the temp sensor can confuse the ECM into enriching the air/fuel ratio and retarding the spark. This can lead to misfiring and can really mess up your catalytic converter if you keep allowing it to happen. Definitely cheaper to fix it early!

Hope this helps,
Sherwin

Posted on Dec 20, 2009

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1 Answer

What does code P 119 mean on my Cadillac 1994 Seville STS


P0119 Cadillac Engine Coolant Temperature Circuit Intermittent
Possible causes - Low engine coolant level
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- 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
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1 Answer

What can cause trouble code p0118 engine coolant temp sensor ( high voltage input ) 99 intrepid 2.7 v6


The engine coolant temperature (ECT) sensor is a variable resistor, that measures the temperature of the engine coolant. The ECT sensor has a signal circuit and a low reference circuit. The engine control module (ECM) 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 decreases. With high sensor resistance, the ECM detects a high voltage on the ECT signal circuit. With lower sensor resistance, the ECM detects a lower voltage on the ECT signal circuit. If the ECM detects an excessively high ECT signal voltage, which is a low temperature indication, DTC P0118 sets. You have A bad coolant temp sensor or a wiring problem !

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1 Answer

06 nissan primera t spec


P1612 is Nissan Imobilizer code or NATS "chain of IMMU" check fuse 36 (10amp) out near the battery in fuseable link box. If that does not do it then you will have to gather up all your square black headed keys and tow it to the dealership or have a computerized lock smith reintroduce the keys to the car. The car is detecting a problem with the key or is not seeing the key to allow the car to turn on the fuel system. After 4 attempts with a bad or non programed key the car will enter lock mode.

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P0118 The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the 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?
An excessively high voltage from the sensor is sent to ECM.
Possible Causes
- Harness or connectors (The sensor circuit is open or shorted.)
- Engine coolant temperature sensor may be faulty
- Low engine coolant level."

P0335 The engine crankshaft sensor was a recall problem they are experiencing. You can call NNA Nissan North America for all he details to see if your call is in te VIN range numbers. If not you woll have to replace the sensor. It causes a loss of engine drive power problem and may cause your car to stall leading to a very dangerous situation

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1 Answer

P 1401 location


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- EGR Temperature Sensor circuit poor electrical connection
- Faulty EGR Temperature Sensor
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1 Answer

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

Possible causes:
(Inspect the following... Repair/Replace if necessary)
- Low engine coolant level
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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.

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2 Answers

97grand am code P0118 replaced ect sensor clear code P0118 returns reference voltage is 2.4 volts engine off key on scan tool shows -38F with engine hot replaced ecm same result


Engine coolant temperature (ECT) sensor is a thermistor screwed into a coolant passage in the cylinder head. Sensor resistance is high when coolant temperature is low and resistance drops when coolant temperature increases. The powertrain control module (PCM) provides a 5 volt reference and a ground to the sensor. The PCM monitors voltage drop to determine coolant temperature. If the ECT reads less than freezing temp. when engine has been running for more than a few minutes, the PCM determines a circuit fault and sets this code. Or if the PCM determines the sensor resistance is out of specs, this code is set.

The reference values given below are measured between ECM terminal 72 and ground...



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When measuring input / output voltage be careful not to use ECM ground terminals. The ECM will enter fail safe mode once a malfunction is detected and the MI will light up.

Usually, P0118 is indicative of a bad temperature sensor, but doesn't rule out these other possibilities. If you're unsure of how to diagnose a PCM, do not attempt.

Keep us updated.

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1 Answer

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---
It looks like the above, under hood, passenger side, upper engine area, mounted in front side of water outlet (according to Autozone.com).

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1 Answer

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2 Answers

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