What causes a computer to flag a p0401 code?
The computer will flag your P0401 code in the computer when it recognizes that there is not enough exhaust gas going back through the intake chamber… or simply, a low flow which causes the computer to flag the P0401 code. How does your computer know how much exhaust gas is being burned if any? Different manufacturers do it differently.
What does p0401 EGR system insufficient flow detected mean?
So you have changed the EGR valve and this p0401 code continues to pop up on the computer. You are frustrated and ready to drive your car off of a cliff. What does this P0401 diagnostic trouble code mean anyway? The correct definition for this diagnostic trouble code P0401 is “ Insufficient EGR Flow Detected “.
What does fault code p0401 on OBD II mean?
What Does Code P0401 Mean? OBD II fault code P0401 is a generic code that is defined as “ EGR Insufficient Flow Detected”, and is set when the PCM (Powertrain Control Module) detects a lower than expected flow of exhaust gas through the EGR (Exhaust Gas Recirculation) system.
What causes a p0401 code to be flagged?
If it does not see the right change in the o2 sensor signal, it will flag your P0401 code. Other manufacturers use the MAP sensor. When the EGR valve is commanded open by the computer, the manifold vacuum will change and MAP sensor signal will change.
So you have changed the EGR valve and this p0401 code continues to pop up on the computer. You are frustrated and ready to drive your car off of a cliff. What does this P0401 diagnostic trouble code mean anyway? The correct definition for this diagnostic trouble code P0401 is “ Insufficient EGR Flow Detected “.
Is the p0401 code for exhaust gas recirculation?
Note that this code does not apply to applications that use VVT (Variable Valve Timing) or VCT (Variable Camshaft Timing) systems, since these systems achieve the same combustion temperature reducing effect as exhaust gas recirculation.