C0709 Chevrolet Optra OBD Code

OBD/2 C0709 error code description and symptoms.

Low Speed Fuel Pump Primary Circuit Malfunction The PCM monitors the low speed fuel pump (LFP) primary circuit output from the PCM.
The test fails if: When the LFP circuit is commanded on (grounded), excessive current draw is detected on the LFP circuit; or when the LFP circuit is commanded off, voltage is not detected on the LFP circuit (the PCM expects to detect VPWR voltage coming through the low speed fuel pump relay coil to the LFP circuit). Open or shorted low fuel pump (LFP) circuit Open VPWR to low speed fuel pump relay Damaged low speed fuel pump relay Damaged PCM An open circuit or short to ground can only be detected with the low speed fuel pump.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

C0709 Chevrolet Optra Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine C0709 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If passengers seat belt buckle switch circuit open so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the passengers seat belt buckle switch circuit open.

Common Causes of Chevrolet Optra C0709 OBD2 Code

A common cause of code C0709 is the failure of Passengers Seat Belt Buckle Switch Circuit Open, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Faulty Mass Air Flow (MAF) sensor
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
Faulty Air Flow Meter

C0709 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.

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

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C0709 Chevrolet Optra OBD Code

C0709 Chevrolet Optra Error Code Repair Process :

Common Causes of Chevrolet Optra C0709 OBD2 Code

C0709 code for other Chevrolet cars