Question about 2004 Chevrolet TrailBlazer

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P0410, p2101 and p0014 codes

Which is likely the originating culprit and what are most likely fixes.

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Possible causes
- Faulty Vacuum hoses damaged
- Faulty Air Pump inoperative
- Air bypass solenoid harness is open or shorted
- Air bypass solenoid circuit poor electrical connection
- Air bypass solenoid leaking/blocked or stuck open/closed
- Air diverter valve leaking/blocked or stuck open/closed
p0410, p2101 and p0014 codes - help.jpg What does this mean? When is the code detected?
The secondary air injection system does not detect the presence of air in the exhaust when introduced by the secondary air injection system.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hesitation
P0410 Description
An air pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module (PCM) grounds the Air pump relay control circuit which energizes the Air pump. The PCM also grounds the Air combination valve vacuum control solenoid circuit, which energizes the Air vacuum control solenoid. Vacuum is then applied to both Air combination valve diaphragms which opens the shut off valves. The PCM enables both circuits simultaneously when Air system operations id desired. When the AIR system is active, then Air pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR combination valves replace the conventional check valves. When the AIR system is inactive the shut off valves prevent air flow in either direction.

Read more: http://engine-codes.com/p0410.html#ixzz31FMsMMLJ

Posted on May 09, 2014

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Posted on Jan 02, 2017

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I have a 05 trailblazer that the check engine light keeps comming on


Hi there:DTC P0014 - This is a Camshaft Position sensor performance. Before you replace any parts, have the PCM reprogrammed with update calibrations to address this problem.
DTC P0410 - The Secondary Air Injection (AIR) System is designed to reduce exhaust emissions after initial engine start-up. This occurs when coolant start up temperature and intake air temperature (IAT) are at the conditions listed below. The AIR pump will operate for less than 25 seconds . The powertrain control module (PCM) commands the AIR system ON by simultaneously supplying a ground to the AIR pump relay and the AIR solenoid relay. When commanded ON the AIR pump forces fresh air through the electronic shut-off valve and into the exhaust manifold, accelerating catalyst operation. When the AIR system is inactive, the electronic shut-off valve prevents airflow in both directions. The PCM will run the AIR diagnostic passive test only on ignition cycles when the pump is commanded ON. If this test passes, then no active test will run. If the passive test fails, or is inconclusive, the active test will run later in the ignition cycle. At that time the PCM runs a maximum of two 3 second active tests, monitoring the heated oxygen sensor (HO2S) 1 voltage, expecting a drop below 150 mV . When the PCM detects an insufficient HO2S 1 response, DTC P0410 will set.
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Jun 20, 2012 | 2005 Chevrolet TrailBlazer

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