Question about 2006 GMC Sierra 3500

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Engine light came on and code read po403 egr valve , warrenty covered new part and approx 600km down the road light came on again reading code po678

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This code is a cylinder number 8 glow plug failure. These can be read using an ohm meter.


A good plug will register between 0.6 - 2.0 ohms

Posted on Sep 05, 2009

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I believe if you check with GM dealer there is a recall, or TSB (technical service bulletin) regarding the glow plugs. Sometimes just a bad/dirty connection could be culprit as well.

Posted on Sep 05, 2009

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1 Answer

2010 Dodge Grand Caravan code po403 , po406?


PO403 is a bad egr circuit & 406 is a bad egr valve. 403 may be triggering 406. Make sure the wiring is in tact with good voltage & ground connectors first. repair 406, clear codes & you may have solved both probs. Poss bad egr valve too, good luck

Jul 02, 2017 | Dodge Cars & Trucks

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Fault code po403/po404


the 403 is a circuit which can be a wiring , sensor or egr connection os faulty
http://www.obd-codes.com/p0403 http://www.obd-codes.com/p0404

Jul 19, 2016 | Cars & Trucks

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Need to know what these codes are for I have a 2004 L300 Saturn PO403 and PO727


P0403 is EGR (exhaust gas recirculation) circuit malfunction
P0727 is Engine Speed Input Circuit No Signal
http://www.check-engine-light.com/trouble-codes

Apr 15, 2015 | 2004 Saturn L300

1 Answer

What causes engine to accelerate without gas?


Possibilities:
  1. Leak in intake manifold or deteriorated throttle body gasket;
  2. Loose or missing throttle body spring;
  3. Defective idle air bypass valve;
  4. Bad throttle position sensor;
  5. Bad EGR valve or EGR position sensor;
  6. Evil aliens.
If there is, or has recently been, a CHECK ENGINE light showing, have the stored codes read out. They may reveal the culprit or, at least, indicate where to begin looking.

Aug 09, 2014 | 1992 Buick Park Avenue

1 Answer

Engine light on code reads po401


I believe this code is insufficient EGR flow. On this engine, the passages to the EGR valve often become carboned up and cause this code. Remove the EGR valve and inspect the passages to see if they need to be cleaned.

Jun 14, 2010 | 2006 Ford Mustang

1 Answer

CodePO403 does not go away


P0403 Exhaust gas recirculation circuit malfunction.
The EGR valve is not happy.
This may require a new EGR valve.
I would try fuel injector cleaner first.
Put a full bottle in 1/3 tank of gas a give it a good run....could be a piece of carbon holding the valve out of position.
Does it idle ok?
A rougher than normal or faster than normal idle speed could be a stuck valve.

Aug 12, 2009 | 2001 Mitsubishi Eclipse

2 Answers

Same


po113 is--IAT sensor curcuit high input, po403--egr curcuit flow malfunction. IAT is intake air tempurature curcuit, for egr take off and clean carbon build up from inside of engine to egr valve.

Jun 06, 2009 | 1999 Chevrolet Malibu

1 Answer

I have problem with code 1126 (toyota 4 runner 2001


Manufacturer Specific Codes

P1100
BARO Sensor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code

P1120 Accelerator Pedal Position Sensor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code

P1121 Accelerator Pedal Position Sensor Range/Performance Problem

P1125 Throttle Control Motor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code

P1126 Magnetic Clutch Circuit

P1127 ETCS Actuator Power Source Circuit

P1128 Throttle Control Motor Lock

P1129 Electric Throttle Control System

P1130 Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 1) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code - More Related Information

P1133 Air/Fuel Sensor Circuit Response (Bank 1 Sensor 1) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code

P1135 Air/Fuel Sensor Heater Circuit Response (Bank 1 Sensor 1) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code - More Related Information

P1150 Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 2)

P1153 Air/Fuel Sensor Circuit Response (Bank 1 Sensor 2) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code

P1155 Air/Fuel Sensor Heater Circuit. (Bank 1 Sensor 2)

P1200 Fuel Pump Relay Circuit

P1300 Igniter Circuit Malfunction - No. 1

P1305 Igniter Circuit Malfunction - No. 2

P1335 No Crankshaft Position Sensor Signal - Engine Running

P1349 VVT System

P1400 Sub-Throttle Position Sensor

P1401 Sub-Throttle Position Sensor Range/Performance Problem

P1405 Turbo Pressure Sensor Circuit

P1406 Turbo Pressure Sensor Range/Performance Problem

P1410 EGR Valve Position Sensor Circuit Malfunction - Read Our Article on EGR Valve Codes For Help With This Toyota Check Engine Light Code

P1411 EGR Valve Position Sensor Circuit Range/Performance - Read Our Article on EGR Valve Codes For Help With This Toyota Check Engine Light Code

P1500 Starter Signal Circuit

P1510 Boost Pressure Control Circuit

P1511 Boost Pressure Low

P1512 Boost Pressure High

P1520 Stop Lamp Switch Signal Malfunction

P1565 Cruise Control Main Switch Circuit

P1600 ECM BATT Malfunction

P1605 Knock Control CPU

P1630 Traction Control System

P1633 ECM

P1652 Idle Air Control Valve Control Circuit

P1656 OCV Circuit

P1658 Wastegate Valve Control Circuit

P1661 EGR Circuit

P1662 EGR Bypass Valve Control Circuit

P1700 Vehicle Speed Sensor '2' Circuit Fault

P1705 Direct Clutch Speed Circuit Fault

P1765 Linear Shift Solenoid Circuit Fault

P1780 Park/Neutral Position Switch Malfunction (Only For A/T)

Back To Top Of Toyota Check Engine Light Codes Page

Mar 21, 2009 | 2002 Toyota 4Runner

1 Answer

Engine service light


The DPFE (Diferential Pressure Sensor)sensor is usually mounted on the engine and is connected to the pipe that runs from the exhaust manifold to the EGR valve with two rubber hoses. When the sensor goes bad, the Check Engine light comes on and typically sets any or all of teh following fault codes: P0171 & P0174 (lean codes), and/or P0401 (insufficient EGR flow). Nine out of ten times, the fault is not a bad EGR valve or a vacuum leak, but a bad DPFE sensor. A replacement costs about $112 at Ford, or about $48 at an aftermarket auto parts store.I hope this helps.

Sep 30, 2008 | 2001 Ford Mustang

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