View Full Version : Finally got the code for y'all

12-21-05, 04:07 PM
Well, as an update, I finally went to AutoZone to finally get the actual code for my check engine light. It's P0411. Any help would be appreciated! thanks!

04-06-06, 10:40 PM
Mine had that same code. If i am not mistaken(correct if wrong) it says something about a secondary air injector. Check your air intake(The big black plastic looking tubes in the front) and all other air lines. I was told by a dealership that this is a big evaporative code, which translated is a gas cap? Im not sure , my check engine light has been on for about2 months, with that code. Seems to run fine.

04-07-06, 05:45 AM
secondary air injector: incorrect flowrate (too much or not enough)

04-08-06, 12:59 AM
I had the same problem in the past and i believe that this issue has been discussed here over and over. Do a little search and you'll definitely find the thread.

04-08-06, 06:59 AM

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05-28-06, 10:35 PM
Document ID# 742353
1998 Cadillac Catera


Subject: Check Engine Light Illuminated, DTC P0411 (Replace Secondary Air Inject. Check Valve) #00-06-04-032 - (08/10/2000)

Models: 1997-1999 Cadillac Catera

with 3.0L Engine (VIN R -- RPO L81)


Some customers may comment that the Check Engine Light is illuminated.

The 1997-1999 Catera may experience intermittent or repeat DTC P0411 for the secondary air injection (AIR) system. In many instances, the dealer may not be able to duplicate this condition.

This condition may be due to a partially or completely restricted air check valve. The check valve contains four reed valves. If one or more of the reed valves are stuck closed, this will restrict the air flow enough for DTC P0411 to set.

Install the Tech 2 to the vehicle DLC and check for DTC's.
Diagnose all other ECU DTCs prior to diagnosing the P0411.
Use the latest version of SI 2000 to diagnose all DTC's.
When the causes of all other DTC's have been corrected, begin the P0411 diagnosis.
For DTC P0411 diagnosis, use the latest version of SI 2000.
Important: The air pump on the Catera is equipped with an internal circuit breaker designed to protect the air pump from overheating. Prolonged or repeated testing of pump operation with the Tech 2 may cause the circuit breaker to open, rendering the pump inoperative. DO NOT replace the pump if this occurs. The pump will resume normal operation when the internal temperature cools sufficiently.

A new diagnostic aid has been added to the Tech 2 recently which will allow the AIR system to be operated using a Service Bay Test for 1999 model year vehicles. This feature is not available for the 1997-1998 model year vehicles. The Tech 2 scan tool will command the ECU to run the on-board diagnostics for the AIR system. If the condition is present, the ECU will set the appropriate DTC.

If the diagnosis points to the secondary air injection check valve as the cause of DTC P0411, replace the valve with P/N 09196528 for model year 1997-1999 vehicles.

The Service Information is not designed to diagnose vehicles that have been serviced with incorrect components. The following table is to help identify vehicles with previously installed incorrect components.

Model Year
Vendor P/N

Cut-Off Valve

Pump Air

Cut-Off Valve

Parts Information
Part Number

Valve, Check

Parts are currently available from GMSPO.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Labor Time

Valve, Secondary Air Injection Pump Check - Replace
0.4 hr

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

© Copyright General Motors Corporation. All Rights Reserved.

Document ID# 742353
1998 Cadillac Catera