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Getting error code e049 Air Injection Reaction AIR System Fault on 1990 Cadillac Deville how do I fix problem

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Posted on Jan 02, 2017

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SOURCE: hey i have a few problems with the cadillac deville 03

change the air fow senser.

Posted on Jul 06, 2009


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I have a 2004 cadidillac deville with code P0410 & P0420

Circuit Description
The secondary air injection (AIR) system reduces exhaust emissions after initial engine starts. This occurs when the engine start-up coolant temperature and the intake air temperature (IAT) are at the parameters indicated in Conditions for Running. The AIR pump will continue to operate until Closed Loop operation is achieved.
The powertrain control module (PCM) activates the AIR system by simultaneously supplying a ground to the AIR pump relay and the AIR solenoid relay. The AIR pump forces pressurized fresh air into the pipes/hoses and past the AIR check valve into the bank 1 exhaust manifold, accelerating the catalyst operation. When the AIR system is inactive, the AIR shut-off valve prevents airflow in either direction.
The PCM can detect an AIR system airflow fault by monitoring the heated oxygen sensor (HO2S) bank 1 sensor 1 during normal Closed Loop engine operation. This is an active test. The active test will pass or fail based on the response from the HO2S 1. The active test consists of three tests run at 3-second intervals. A decreasing HO2S 1 voltage parameter response indicates that the AIR system is functioning properly.
The AIR system consists of the following components:
• The AIR pump
• The AIR pump relay
• The AIR injection electronic shut-off valve
• The AIR injection solenoid relay
• The fuses, and the related wiring
• The pipes/hoses
When the PCM detects an insufficient HO2S 1 response, DTC P0410 sets.

DTC P0420 Catalyst System Low Efficiency
Videos on youtube suggest you watch P0420 P0420 How To Diagnose Bad Catalytic Converter EricTheCarGuy How to test an electric air pump P0410 case study

Sep 04, 2016 | 2004 Cadillac Deville

1 Answer

How to replace air pump on a 2001 cadillac deville

P0410 Secondary Air injection System Troubleshooting ...

? 4:23
Oct 3, 2008 - Uploaded by richpin06a P0410 Secondary Air injection System. ... I have a 2001 Saturn S-series showing this code. The air pump was not running. ... The fix for me was to replace the hose/wire that runs from the diverter valve, over a crevice on the ...

Sep 08, 2015 | 2001 Cadillac DeVille

2 Answers

What is OBD code po4 18 on a 2004 Cadillac deville

P0418 Secondary Air Injection System Relay "A" Circuit Malfunction

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May 22, 2015 | 2004 Cadillac Deville

1 Answer

Where is the secondary air injection system location on a 2001 cadillac deville

The A.I.R. (secondary air) pump is located at the lower left side front of the car. You need to remove the car's front lower shield to get at it, and the hoses and check valve connected to it.

Oct 28, 2014 | 2001 Cadillac DeVille

1 Answer


p0412 Secondary air injection switching valve A circuit
Right side of engine compartiment. ( underhood fuse block )
- Air pump fuse 50A- Air control valve relay- ignition1 fuse 10A ( positive for the relay )The secondary air injection pump relay is located near radiator surge tank.Left front of engine compartiment = Secondary air injection pump

Nov 15, 2011 | 2002 Cadillac Deville

1 Answer

1990 Cadillac biaritz engine check light on>>code E049 represents what?

E049 - Air system faultECM failed to detect an increase of 15 or more integrator counts when air is diverted to exhaust manifold and system has failed 4 times.Check operation of air injection system, verify oxygen sensor operation,Check all hoses, pipes & wiring for damage.

Sep 09, 2011 | 1990 Cadillac Eldorado

1 Answer

How do i fix a0410 code

The code basically says that the O2 sensors did not see the extra oxygen that the air injection system would normally provide.
Check that the air injection shut-off valves hold vacuum. It's a common failure.
Also, you might want to power up the air injection pump and make sure it is working.

Mar 28, 2010 | 2003 Cadillac Deville

2 Answers

1998 328i.. Got a 1421 and 1423 code...not sure where to start...

1997 BMW 328I 2.8L Customer Concern: MIL is on with trouble codes P1421 and P1423, for incorrect secondary airflow on both cylinder banks. Tests/Procedures: 1. Perform a functional test of the Air Injection Reaction (AIR) system. Tee a vacuum gauge into the vacuum hose attached to the diverter valve, located on the cylinder head towards the front of the engine.

2. Allow the vehicle to sit over night. Start the engine (cold) while monitoring the amount of vacuum on the gauge at startup. At temperatures from -10 to 40 degrees Celsius, there should be at least 17 inches of vacuum. At the same time, the AIR pump should run and pump a large volume of air into the exhaust. Potential Causes: A.I.R. Pump
Air Pump Relay
Restricted Cylinder Head
Diverter Valve
Tech Tips: These codes are related to a problem detected in the Secondary Air Injection system. Scan tools with BMW software include a feature to command the AIR pump on and off. The pattern failures for these codes are the AIR pumps due to leaks in the diverter valve and moisture or condensation in the AIR pump.

Possible fix but not all items. Just areas to look at:
Confirmed Fix - A.I.R. Pump - A.I.R. Diverter - A.I.R. Pump, Air Injection Reaction Diverter (AIRD) Valve - Air Injection Reaction Diverter (AIRD) Valve - Check Valve, Secondary Air Pump - Diverter Valve Vacuum Lines

Jul 04, 2009 | 1997 BMW 328

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