Question about 2000 Hyundai Sonata

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Replacing Idle Air Control Valve on '00 Sonata

Got a Check Engine Code: P1520 Manf Cntrl Veh Spd Idle Speed Control and would like to replace the Idle Air Control Valve myself...can you provide shop manual information for replacing?

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No such code: P1520

Posted on Sep 23, 2009

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You might just need to clean the IAC valve and throttle body. Try autozone for a free repair guide. You might need to buy a set of socket driver bits if it's held on with anti tamper screws.

Posted on Sep 11, 2009

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1 Answer

Iscv 33


There is a digital stepper motor installed in the idle air control valve and it is operated by the ecm after taking all the outputs from various sensors.
Check engine light error code 33. The idle air control valve circuit open or shorted to ground. There could be three possibilities which can trigger this code and the check engine light comes on.
1. Check the wiring harness for open circuit or short to ground. Check the idle speed control valve connector for looseness,corrosion of poor contacts. Jiggle the harness at various places to find any damaged wire.
2. Idle speed control valve defective. (replace. Merely replacing the electronic part of the valve can also solve the problem)
3. ECM defective. (replace)

Dec 12, 2013 | 1999 Toyota Corolla

1 Answer

Veh stalls when i put it in reverse


Engine stalls cold or RPM fluctuates at idle up and down or dies near idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 (or OBD1) fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control. If the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.

Dec 22, 2012 | 1998 Dodge Dakota

1 Answer

Manf. cntrl veh. spd. idle speed control auxiliary inputs


DTC P1572: BRAKE CANCEL SWITCH OUT OF SELF TEST RANGE NOTE: Limited information available from manufacturer.
NOTE: For circuit reference, see appropriate diagram in WIRING DIAGRAMS article.
Possible Causes
  • Open circuit, high resistance or short circuit between the brake cancel switch and PCM signal circuit.
  • Open or short circuit in the brake cancel switch power supply circuit.
  • Brake cancel switch failure.

Apr 18, 2012 | Volkswagen Jetta Cars & Trucks

1 Answer

P1506 mfr ctrl veh spd idle ctrl aux inp


most likely the idle air control valve is dirty.try cleaning it,if that doesnt fix it test the throttle position sensor.TPS usually causes higher than normal idle speed or intermittent misfires depending on throttle angle while driving.send me a msg for test procedure if needed

Dec 17, 2011 | 2002 Mercury Sable

1 Answer

I have a 2006 dodge ram 1500 4x4 with a 5.7 hemi. engine light came on, i got 2 codes P1521 and P0456 what do these mean?


P1521 =Manf control veh spd, idle control, auxillary inputs

P0456=Emission control system eak, very small


???Good Luck

May 25, 2010 | 2005 Chrysler 300

1 Answer

Engine light code P1507: ''manf cntrl veh spd idle speed control auxiliary inputs'' and P0306: ''cylinder 6 misfire detected''. this ranger resitates press gas. where do i start?


P1507 is "Idle Air Control System Underspeed Error". This code indicates a problem with the Idle Air Control (IAC) valve assembly, harness wiring for the IAC or the Powertrain Control Module. So checking the IAC next is the most logical step.

Oct 07, 2009 | 1998 Ford Ranger SuperCab

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Replacing EGR Valve on '00 Sonata 2.4L...Got a


Go to www.hmaservice.com and register( Vehicle by VIN). Afterward, you have access to shop manuals, service bulletins, wiring diagrams, etc. about your vehicle.
NOTE:.. EGR RESTRICTION POSSIBLE between exhaust manifold and EGR valve... check it out before replacing valve.... replacing the valve may not be the solution... having it properly diagnosed is!

Sep 10, 2009 | 2000 Hyundai Sonata

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

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