B0869 Alvis Tf OBD Code

OBD/2 B0869 error code description and symptoms.

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.

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.

B0869 Alvis Tf Error Code Repair Process :

The rule of B0869 code when it comes to emissions-related vehicle repair is that any modification that changes the vehicle from a certified configuration to a non-certified configuration is considered tampering: this applies to both vehicle owners and repair facilities and is, therefore, a Federal offense. Replacing a catalyst with a straight pipe is one traditional example of fuel demand command signal circuit malfunction. Likewise, overriding the OBD B0869 error in system through the use of high-tech defeat devices or non-certified computer chips, for example, would also be considered tampering. The OBD system may, however, be repaired back to its original certified configuration with certified performance chips or appropriate aftermarket parts.

Common Causes of Alvis Tf B0869 OBD2 Code

A common cause of code B0869 is the failure of Fuel Demand Command Signal Circuit Malfunction, but there are several other possible causes as well, such as ;

Dirty Oil
Clogged or faulty fuel injector (s)
Faulty Fuel injector
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection

B0869 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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B0869 Alvis Tf OBD Code

B0869 Alvis Tf Error Code Repair Process :

Common Causes of Alvis Tf B0869 OBD2 Code

B0869 code for other Alvis cars