What does the code p0118 mean on the ECM?

This data is sent to the ECM, which uses this data to regulate the air to fuel ratio, cooling fans, and ignition spark timing needed by the engine. Code P0118 is the result of the ECT sensor indicating a high voltage input from the coolant temperature circuit. (typically over 4.7V)

How to diagnose a p0118 Chevrolet engine?

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. How much do you know about cars? The cost of diagnosing the P0118 CHEVROLET code is 1.0 hour of labor.

What is the diagnostic code for engine coolant temperature?

Cost of diagnosing the P0118 code. P0118 is a diagnostic trouble code (DTC) for “Engine Coolant Temperature (ECT) Sensor Circuit High Open Problem”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.

Where is the coolant temperature sensor on a Chevy?

The Engine Coolant Temperature (ECT) sensor contains a semiconductor device which changes the resistance based on the temperature (a thermistor). The ECT sensor is mounted in the left bank cylinder head near the front of the engine. The ECT sensor has a signal circuit and a ground circuit.

What does the code p0128 mean on a Chevy Aveo?

P0128 is a relatively common OBDII trouble code. It is triggered when your Chevy Aveo ‘s coolant temperature fails to reach the proper operating temperature. It’s a generic powertrain code, which means that regardless of who manufactured the vehicle, it’ll have the same meaning (1996+).

What does it mean when your coolant sensor says p0118?

A code P0118 may mean that one or more of the following has happened: An open in the ground circuit between the ECT sensor and the PCM A short in the voltage feed between the sensor and the PCM A bad temperature sensor (shorted internally) First, if you have access to a scan tool, check the reading of the coolant sensor.

Is the Chevy Aveo coolant thermostat too low?

The fan can come on at any time. P0128 is not a serious threat to the immediate drivability of your Aveo. It should be noted that most modern fuel injected engines to like to run at 200+ degrees. Letting them run too cool can problems after an extended period of time.

What are the possible causes of a p0113 code?

P0113 Possible Causes. Faulty Intake Air Temperature (IAT) sensor. Dirty air filter. Intake Air Temperature (IAT) sensor harness is open or shorted. Intake Air Temperature (IAT) sensor circuit poor electrical connection.

What does p0123 mean on an engine control module?

All our repairs are backed by our 12-month / 12,000-mile warranty. P0123 is the generic OBD-II code which indicates that the Engine Control Module (ECM) has seen the TPS circuit A output voltage go above the sensor’s expected voltage specification range.

What is the p0118 coolant temperature sensor circuit?

P0118 Engine Coolant Temperature Sensor Circuit Hi Voltage: diagnostic checks for a resistance corresponding to a very low engine coolant temperature. Engine control module (ECM) or PCM (powertrain control module) supplies 5 V to the ECT sensor signal circuit and a ground for the low reference circuit.

What causes the p0113 check engine light code?

As the temperature increases, resistance decreases. Low temperature results in a high signal voltage. When the PCM sees a signal voltage higher than 5 volts, it sets this P0113 check engine light code.

What causes the p0118 OBD-II trouble code?

All our repairs are backed by our 12-month / 12,000-mile warranty. P0118 is the OBD-II generic code that indicates the Engine Control Module (ECM) has seen the ECT sensor output go more than 4.91 V or less than -40°C (-40°F). What causes the P0118 code?

What does it mean when trouble code p0138 is set?

When trouble code P0138 is set, this indicates that there is a high voltage (steadily above .9 volts) for more than 10 seconds indicating a lack of oxygen in the exhaust stream and an abundance of fuel at sensor 2 on the bank 1 of the engine.

What does a trouble code on an OBD mean?

Diagnostic Trouble Codes or OBD2 Trouble Codes are codes that the car’s OBD system uses to notify you about an issue. Each code corresponds to a fault detected in the car. When the vehicle detects an issue, it will activate the corresponding trouble code.

What does p0138 mean in a catalytic converter?

O2 Sensor Circuit High Voltage (Bank 1, Sensor 2) What Does P0138 Mean? Oxygen sensor 2 is the downstream oxygen sensor in relationship to the catalytic converter. It measures the amount of air and fuel coming out of the catalytic converter to ensure the catalytic converter is functioning properly.

What does it mean when OBD says O2 sensor is faulty?

If they don’t have your car Google the code to find the exact meaning . Always investigate as the code is not always so direct, for example if you have a fault code for the O2 sensor it does not always mean the sensor is faulty, it could be the wiring or the connection so be sure you test any part first.

What causes an EOBD fault code ( DTC )?

DTCs may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.