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How to fix code P1121 on 2000 Lexus gs300 ?

Engine starts ok ,but no power .no high idle at all

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  • Lexus Master
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Test/Replace pedal position sensor.

Posted on Jan 05, 2018

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: HAVE A CODE PO446 1999

P0446 is an evap code. Most likely, you need to change the charcoal canister vent valve (CCV) under the trunk floor. Fuel cap codes set 3 codes at once, P0440. P0441 and P0446, all at the same time.

Posted on Sep 10, 2008

  • 2 Answers

SOURCE: engine stalls after cold start-up & release from high speed idle

I had a similar problem.  I found the filter cartridge below the pcv valve had carboned up, and after the crank case pressurized, oil was forced out the pcv supply line to the throttle body.  The idle air control valve solenoid got oil in it and caused my problem, but only when it was cold.  The pcv cartridge is accessed by removing the pcv valve and the rubber fitting that the pcv valve mounts in.  It can then be fished out with a pick set, and it is a pain because you can't see it, but you can get you hand back there.  I hope this helps you.

Posted on Feb 28, 2009

01fordeb
  • 1033 Answers

SOURCE: I have a 2001 Lexus gs300 and I need to repair

Buy the sensors and put them on yourself. Buy the aftermarket. They are the same. OEM will cost you about $110 each, Aftermarket $65 each. I work for Bosch and run the line that makes oxygen sensors, there's a lot people don't know about aftermarket and OEM. These can be removed with a 22mm wrench or you buy a special oxygen sensor removal socket/wrench. It's a matter of getting it loose. Run the engine for 1-2 min to warm the exhaust, this helps to loosen the sensors and keeps from stripping the threads. If a shop does this $250-325 depending on shop rates.

Posted on Feb 25, 2010

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SOURCE: 1999 gs300 shows code p1349 and the engine runs

Its a Oil Control Valve most likely. Get the valve. Its like 100 from Lexus. Mine did the exact same thing with that code. GS300

Posted on May 19, 2010

  • 86 Answers

SOURCE: my 2005 altima idles high and engine code

Your Altima will require an idle air volume learn after cleaning. This procedure will set your idle speed. If the code keeps recurring after the IAVL your throttle chamber may need to be replaced.

Posted on Jun 24, 2010

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1 Answer

Fix code C1201


C1201 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.
The reason of C1201 OBD-II Engine Trouble Code is Manifold Absolute Pressure/Barometric Pressure Circuit High Input.
Parts or components should not be replaced with reference to only a C1201 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

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94 gs300


Check all of the battery terminals and cables and check the wires on the starter/selonoid, start from the battery and follow the cable out and check all conections , clean and tighten them and if it still does it the starter/selonoid is bad and needs replacement...

Sep 18, 2008 | 1994 Lexus GS 300

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1994 gs300 high idle when warm


check the TPS sensor and circuit

May 25, 2017 | 1994 Lexus GS 300

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How do I fix code 13 engine speed sensor Above 1000 rpm


Clearing the codes is simple that is done by removing the fuse of the EFI from junction box 2 for 10 seconds. Make sure to remove the jumper wire and switch the key off before clearing the codes.

Here are some common Lexus vehicles 1990-1995 codes:

Code 12 and Code 13 Rpm signal circuit fault
Code 14 Igniter signal circuit fault
Code 16 ECT control signal fault
Code 21 and Code 28 Main oxygen sensor fault (for ES300; SC300 & GS300 models)
Code 22 Coolant temperature circuit fault
Code 24 Intake temperature sensor circuit fault
Code 25 and Code 26 Air fuel ratio fault (for ES300 & SC300 models)
Code 27 Sub-oxygen sensor circuit fault (for ES300 CA & GS300 models)
Code 31 Low airflow meter voltage (for ES300 and GS300 models)
Code 32 High airflow meter voltage (for ES300 model)
Code 35 Barometric pressure sensor circuit fault (for GS300 & SC300 models)
Code 41 and Code 47 Throttle position sensor circuit fault
Code 42 Vehicle speed sensor circuit fault
Code 43 Starter signal
Code 51 Switch condition signal fault (for ES300; GS300 & SC300 models)
Code 52 Code 52 and Code 55 Knock sensor circuit fault
Code 71 EGR system circuit fault (for ES300; GS300 & SC300 models)
Code 78 Fuel pump control circuit fault (for GS300 & SC300 models)

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1 Answer

Vsc/vsc off check engine light gs300


go get your codes read. sounds like possible misfire due to lack of power. call around alot of places read codes for free then you can start there.

Jul 18, 2012 | 2001 Lexus Gs 300

1 Answer

1999 gs300 shows code p1349 and the engine runs really rough at idle , runs fine off idle


Its a Oil Control Valve most likely. Get the valve. Its like 100 from Lexus. Mine did the exact same thing with that code. GS300

May 19, 2010 | 1999 Lexus ES 300

1 Answer

I have a 1994 gs300 and my engine light stays on. It idles a little high on a cold start for about 1 minute then its fine but the light stays on. Does the erg system have a filter that could be causing...


High idle is expected because of settings the coolant and air temp sensors set up with the computer. "cold start choke" The light coming on can be contributed to a rich fuel mixture that lasts too long. The 02 sensor picks that up and triggers the light. So, Your engine coolant sensor may well be the problem.

Sep 28, 2009 | 1994 Lexus GS 300

1 Answer

Lexus GS300 touch screen nav lock


to solve this prob pls contact me tariqwasa@hotmail.com

May 11, 2009 | 2007 Lexus GS300

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