B1394 Chevrolet Cobalt OBD Code

OBD/2 B1394 error code description and symptoms.

Output Shaft Speed sensor circuit intermittent failure The output shaft speed sensor signal to the PCM is irregular or interrupted.
Harness connector not properly seated Harness intermittently shorted, or open Harness connector damaged OSS sensor damaged, or not installed properly Verify harness and connector integrity Verify OSS sensor proper installation.

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.

B1394 Chevrolet Cobalt Error Code Repair Process :

If your vehicle failed a B1394 test and the B1394 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses b1394 power door memory lock relay circuit short to battery a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look b1394 power door memory lock relay circuit short to battery: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

Common Causes of Chevrolet Cobalt B1394 OBD2 Code

A common cause of code B1394 is the failure of B1394 Power Door Memory Lock Relay Circuit Short To Battery, but there are several other possible causes as well, such as ;

Camshaft Position Sensor harness is open or shorted
Engine Control Module (ECM)
Faulty starter motor
Camshaft Position Sensor harness is open or shorted

B1394 is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

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

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B1394 Chevrolet Cobalt OBD Code

B1394 Chevrolet Cobalt Error Code Repair Process :

Common Causes of Chevrolet Cobalt B1394 OBD2 Code

B1394 code for other Chevrolet cars