C0702 Trouble Code

View C0702 obd/2 error code description and symptoms. C0702 engine photo

Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.

As the engine heats up and combustion becomes easier and more complete, the PCM will command the idling control valve to increase the amount of air entering the engine to suit the changing conditions. However, when the load on the engine changes, say, when some electrical consumers or other systems are either turned on or off, the PCM adapts the signal voltage to the idle control valve to ensure that the idling speed remains stable, and at the RPM specified by the manufacturer.

Difficulty Level (Soso)
Level
Repair Time (30 Min.)
Time
Cost Prediction : $ 25-45

C0702 Error Code Repair Process :

For a/c post heater sensor #2 circuit failure check engine light is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. C0702 error code diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks a/c post heater sensor #2 circuit failure with your car's computers to find out exactly what's prompting the light to turn on.

Wrench Tool C0702 is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

Common Causes of C0702

A common cause of code C0702 is the failure of A/C Post Heater Sensor #2 Circuit Failure, but there are several other possible causes as well, such as ;

C0702 code for all cars

You can view according C0702 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C0702 Lotus 33 +C0702 Toyota Sports +C0702 Plymouth Superbird +C0702 Innocenti 990 +C0702 Peugeot Tulip

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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