Question about 2004 Chevrolet Silverado 2500HD

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Code po102 and po443 on a silverado 2500 HD

Changed MAF Sensor and changed purge valve cleared the codes but they still come back

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  • Clint Smock
    Clint Smock May 11, 2010

    Does it run rough when you start it in the morning and then smooth out after about 20 seconds?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

bigawgntown
  • 13 Answers

SOURCE: check engine light

you need to go to an electronic specialist or you can buy one of the scanners that clears the codes for you from advanced auto or autozone or some place like that.

Posted on Jul 30, 2008

motor1258
  • 6674 Answers

SOURCE: Hello I have two codes

PO102- mass air flow sensor.
PO443- Purge solenoid.
Check & clean connections, erase codes & retry, if comes back replace them.

Posted on Apr 24, 2009

davidg65
  • 26 Answers

SOURCE: CODE PO102

sounds like the mass air flow sensor. It is in the intake line squareish part with 2 tamper [proof torque screws.

Posted on Jul 04, 2009

  • 11 Answers

SOURCE: replacing pcv valve

i have a 2004 model of same and has no pvc.it has a small tube,back of drivers side valve cover,a breather vent.but no pvc valve.

Posted on Aug 08, 2009

ElDopa
  • 295 Answers

SOURCE: CODE PO102 after Mass Air Flow Sensor replaced

Most faultcodes don't disappear automaticly, the have to be 'reset' manually after repairing. It sounds like the code didn't get erased after replacing the MAF. You could try to disconnect the battery for 10 minutes (disconnect and reconnect the negative (-) pole), which should erase the code.

Whenever the engine light still comes back on after that, there probably still is some (other) problem ...

Posted on Aug 24, 2009

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1 Answer

Code po443


code p0443 refers to EVAP canister purge valve--circuit malfunction===causes --wiring---EVAP canister purge valve--ECM

code p0451 refers to EVAP pressure sensor --range/performance problem===causes --EVAP pressure sensor

code p0135 refers to heated oxygen sensor(HO2S) 1 bank 1 heater control --circuit malfunction===causes --fuse--wiring--HO2S ---ecm

basically the HO2S sensor is not stable and altering the air/fuel mixture settings for the ECM and this is not being helped by a faulty EVAP purge valve and pressure sensor.

Aug 24, 2014 | Ford F-150 Cars & Trucks

1 Answer

1998 volvo s70 2.4 glt turbo


code p0102 refers to MAF/VAF sensor ---low input ===causes --wiring short to ground. MAF/VAF sensor
code po172 refers to system too rich --bank 1=== causes ---intake blocked --EVAP canister purge valve---fuel pressure ---HO2S sensor
code po random misfires ---plugs --wiring ---injectors--low compression
code po305 refers to cylinder 5 misfire detected ===causes --engine mechanical fault--ignition/ fuel system ---injector ---ECT/MAF

I would check that the air filter is not blocked first as it affects the MAF/VAF sensors . Have a fuel pressure system pressure test done

Feb 13, 2014 | Volvo S70 Cars & Trucks

1 Answer

Gm trouble codes explained


code p0102 refers to mass air flow(MAF) sensor /volume air flow (VAF) sensor -low input. Causes ---wiring short to ground --MAF/VAF sensor ---ECM.

Apr 23, 2013 | GMC Cars & Trucks

1 Answer

2009 pontiac g6 purge valve solenoid


code PO171 fuel trim system lean bank 1 conditions.possible causes air leaks in intake manifold exhaust pipes or exhaust manifold. fuel control sensor is out of calibration such as ECT IAT MAF.fuel component faulty like stopped up fuel filter fuel injectors clogged low fuel pressure faulty fuel pump. HO2S element contaminated or has failed. purge solenoid is part of EVAP system. if you have faulty purge solenoid you would get code like PO443 meaning evaporative emission control system purge control valve circuit malfunction.try replacing fuel filter clean fuel injectors see what happens.

Apr 04, 2013 | 2009 Pontiac G6

1 Answer

Obd codes P0441, P0102 and P0340 on a 1997 Chevy 3500 with a 454


CODE PO441 - EVAP SYSTEM NO FLOW DURING PURGE CONDITIONS. CODE PO102 - MAF SENSOR CIRCUIT LOW FREQUENCY CONDITIONS, CODE PO340- CMP SENSOR CIRCUIT MALFUNCTION CONDITIONS. HAVE PCM CHECK OUT GOT TOO MANY CODES.

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2 Answers

2002 GMC Z-71 Check Engine Light codes????


Off hand, it's by your oil fill tube on top off motor.

Mar 30, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

What is the code PO102 on a 2002 Chevrolet Impala


code PO102 is mass air flow sensor circuit low frequency condition.what it is saying.MAF sensor element hot wire contaminated or sensor failed.MAF sensor signal shorted to ground or grounded circuit problem.MAF sensor wiring routed close to ignition wires generator solenoids or electric motors.PCM has failed.

Jul 14, 2009 | 2002 Chevrolet Impala

1 Answer

I am getting codes PO440 PO443 PO 449 on my 2000 Silverado and the SES light is on


PO440 Possible Causes:
Charcoal canister is loaded with fuel or moisture
Fuel filler cap is loose, cross-threaded, damaged or wrong part
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
Fuel tank pressure sensor is damaged, disconnected or it failed
Fuel tank vapor line(s) is clogged, damaged or disconnected
Purge valve vapor line is clogged, damaged, or disconnected
Purge or vent solenoid power circuit is open (check the fuse)
PCM has failed

PO443:
Purge solenoid control circuit is open or shorted to ground
Purge solenoid control circuit is shorted to system power (B+)
Purge solenoid power circuit is open (test the ENG1 fuse)
Purge solenoid is damaged or has failed
PCM has failed

PO449:
Sames as PO443.

Hope this helps.

Mar 06, 2009 | 2000 Chevrolet Silverado 1500

2 Answers

Check engine light on , code po443 1998 sonata


To cause a P0443, there has to be a problem with the purge control CIRCUIT, not necessarily the valve. Usually they are a unit housing the valve and the solenoid as an assembly. Or it could be comprised of a separate solenoid with vacuum lines to a purge valve. That said, it could be any of the following:
  • Bad purge solenoid (internal short or open)
  • Wiring harness chafing or rubbing another component causing short or open on control circuit
  • Connector worn, broken or shorted due to water intrusion
  • Driver circuit inside powertrain control module (PCM) is bad
I would just clear out the code and if it returns then try the above. Hope this helps you a little bit!

Sincerely,

JC

Nov 15, 2008 | Hyundai Motor 1998 Sonata

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