P0404

Description
EGR VALVE PINTLE STUCK CLOSED


PCM monitors EGR valve pintle position input to ensure that
valve responds properly to commands from PCM. PCM compares actual EGR
position with desired EGR position when valve is commanded open. If
actual EGR position is 15 percent less than desired EGR position when
PCM is commanding EGR valve opened, DTC will set.

Symptoms
You likely won't notice any drivability problems.

Causes

• Actual EGR position is 15 percent less than desired EGR
  position.

Possible Solutions

• Check for poor terminal connections at EGR valve.
• Check for excessive deposits on EGR valve pintle or seat.
• Replace EGR