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My check Engine light is on in my 05 Trailblazer. The code is P0413, how can I fix this and what does it mean?

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P0413 Secondary Air Injection System Switching Valve A Circuit Open. Check your air filter and there is a black box on top of the air cleaner that needs to be replaced

Posted on Apr 17, 2009

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Posted on Jan 02, 2017

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My engine light is on first it is solid and then it flashes ...what can this be


When a check engine light is on it means there is a problem in the obd 2 system that is causing the vehicle to be outside federal emissions 1 an a half times an there is a DTC - diagnostic trouble code stored in the ECM / PCM -engine computer .
A flashing check engine light means there is a 'class A' misfire that is present. This type of misfire WILL ruin the catalytic converter(s), if the problem isn't fixed in a timely manner.

Mar 18, 2015 | 2003 Chevrolet Chevrolet TrailBlazer

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05 trailblazer chugs at 48 mph


Hi, what do you mean by chugs at 48 mph ? Doesn't it go any faster then 48 mph, does it lose power, bog down when you press the gas pedal to the floor. Does it have a misfire , that makes the vehicle buck and jerk ! Is the check engine light on or any other lights for that matter ? How many miles are on this trailblazer ?

Nov 06, 2014 | 2005 Chevrolet TrailBlazer

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2004 trailblazer code po128


P0128:
P0128 OBD-II Trouble Code
Technical DescriptionCoolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

What does that mean?This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat. Similar codes: P0125

In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant temperature (ECT) sensor reading, and the speed of the vehicle.

CausesA code P0128 may mean that one or more of the following has happened:

Low engine coolant level .
Leaking or stuck open thermostat .
Faulty cooling fan (running too much) .
Faulty coolant temperature (ECT) sensor.
Faulty intake air temperature (IAT) sensor .Here's a link on replacing your thermostat.

Feb 06, 2013 | 2004 Chevrolet TrailBlazer

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The 'check engine' light and the 'reduce power engine' light came on on my 2002 chevy trailblazer what could this mean?


A sensor failed. A code will be stored. You need to get the code in order to proceed. With over 200 possible codes its anyones guess what happened.

May 18, 2010 | 2002 Chevrolet TrailBlazer

2 Answers

Check engine light comes on. odb2 code P2096 What does it mean


WHAT EXACTLY MEANS THE CODE P2096 AND HOW I SHOULD FIX IT CRYSLER 300 2010

Apr 24, 2010 | 2005 Chrysler Town & Country

3 Answers

Check engine light is on, diagnostic code p0140 keeps comming up.


I had this problem with my 05 Trailblazer and it happened around 50k miles. The oxygen sensor needs to be replaced and the part costs about 90 bucks but atleast you will have you're check engine light off.

Dec 16, 2009 | 2005 Chevrolet TrailBlazer

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I have a service engine soon light and the code that appeared when check is 1481, do you know what this means?


Service Engine Soon (SES) or Check Engine Light On, DTC P0480, P0526/P1481/P1484 Set (Replace Engine Cooling Fan Wiring Harness) #05-06-02-012B - (10/19/2006)

Models:2004-2006 Buick Rainier
2002-2006 Chevrolet TrailBlazer, TrailBlazer EXT
2002-2006 GMC Envoy, Envoy XL, 

Some customers may comment that the Service Engine Soon (SES) or Check Engine light is illuminated. This condition may be intermittent and upon investigation, the technician may find either DTC P0480, P0526, P1481 or P1484 set.

This condition may be caused by the cooling fan harness chaffing against the plastic guide it routes through. This contact may damage the insulation of the wires enclosed in that harness.

Replace the wire harness: 
Part Number 89024920 Description Harness Assembly, Engine Cooling Fan Wiring

Good luck and keep me posed. 

Aug 11, 2009 | 2003 GMC Envoy

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