What does the code p0677 mean on a glow plug?

What does the code p0677 mean on a glow plug?

The code P0677 tells you that something in the glow plug circuit is faulty causing the glow plug on cylinder #7 to fail to heat up. The entire circuit must be checked to locate the fault. Note: If a P0670 trouble code is present along with this DTC, carry out P0670 diagnosis before diagnosing this code. Symptoms

Why is my engine code p0677 not working?

The engine management computer (PCM) will set the code P0677 The engine will be hard to start or may not start at all in cold weather or when its been sitting long enough for the block to cool. Lack of power until the engine heats up sufficiently. Engine may miss due to the colder than normal cylinder head temperature

Can a bad glow plug cause an engine to start?

Note: If a P0670 trouble code is present along with this DTC, carry out P0670 diagnosis before diagnosing this code. With just one glow plug failure other than the check engine light coming on, the symptoms will be minimal since the engine will normally start with one bad plug.

The code P0677 tells you that something in the glow plug circuit is faulty causing the glow plug on cylinder #7 to fail to heat up. The entire circuit must be checked to locate the fault. Note: If a P0670 trouble code is present along with this DTC, carry out P0670 diagnosis before diagnosing this code. Symptoms

The engine management computer (PCM) will set the code P0677 The engine will be hard to start or may not start at all in cold weather or when its been sitting long enough for the block to cool. Lack of power until the engine heats up sufficiently. Engine may miss due to the colder than normal cylinder head temperature

How does the glow plug controller work on a Duramax?

The glow plug controller has the ability to perform internal checks, an open or a short to ground on each of the glow plug circuits. If the glow plug controller senses a problem in a glow plug circuit, the glow plug on the affected cylinder will be disabled and the glow plug controller will send an error message to the engine control module (ECM).

Note: If a P0670 trouble code is present along with this DTC, carry out P0670 diagnosis before diagnosing this code. With just one glow plug failure other than the check engine light coming on, the symptoms will be minimal since the engine will normally start with one bad plug.