Question about 2007 Chevrolet Avalanche LTZ

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2007 avalanche running rich

Getting dtc code po430

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Posted on Jan 02, 2017

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SOURCE: dtc code p0121 and p2135 2007 chevy malibu

both codes refer to the throttle position sensor, the sensor is at the throttle plate, on the side of the throttle body. to test remove the connector to sensor, use a ohms meter to test. put 1 lead to top connection and the other to the bottom one. move throttle and the needles on the ohms meter should move very even, move throttle slow to get a good reading, needle should move without no hesitation, if the test is bad replace tps sensor. if the sensor gets to bad, it can have an effect on transmission shifting. after fixing sensor have the light turned of with an obd2 scanner.

Posted on Feb 20, 2010

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1 Answer

I have a 2007 avalanche that won't go into 4wd. the auto light keeps blinking

The 4WD transfer case encoder motor position sensor or the selector switch may have failed.
You'll need to hook-up an OBD-II scanner tool to pull the DTC codes.
The code(s) should point you in the direction of the problem- not necessarily pin-pointing the exact problem. You'll need a repair service manual specific to your vehicle that contains symptom flow charts and pin point test instructions to test the system down to the component level

Feb 13, 2017 | Cars & Trucks

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Code po430 2007 trailblazer ss 6.0 engine light cam on why?

Code po430 is your O2 downstream sensor on your right bank telling you that you either have a problem with your catalytic convertor ot possibly your O2 sensor or wiring are bad.

Oct 26, 2015 | Cars & Trucks

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Code po430 comes up twice on scanner little skip and gas milage getting worse

Most likely a failed exhaust converter, that should have lasted
12 to 14 years

Google your codes

So that motor has had issues for years, I would guess

Cylinder Misfires,Rich Fuel Trim ,neglect or something

Have to fix all it's problems, then replace the converters

Apr 06, 2014 | 2008 Dodge Charger

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2006 chevy Avalanche check engine code 172 & 175

the temperature sensor can cause a rich mixture at the wrong time by providing a false reading of cold engine

Sep 28, 2013 | 2006 Chevrolet Avalanche

2 Answers

My engine light was on, so i got a diagnostics done and it said the bank1 sensor 2 needed to be replaced. i Replaced the sensor but the engine light keeps coming back on after the part was replaced and...

no year. stated, sigh, nor country, sigh 2.
no DTC posted.!
post the DTC code, do not interpret it , state it. P0xxx?
flat out.
are there other codes? other stored or pending DTC codes?
there are many oxy codes, not stating the code is bad news.
each has a different reason, guessing is a fail.

btw , sensor 2 does not run the cars fuel mix. that be sensor 1.
btw, sensor 2, is rear of cat sensors.
this sensors purpose IS TO , warn of a dead CAT.

if the CAT is getting NAILED by rich fuel , the cat can be good
and the code P042x is one, that can be cause by other fueling issues. RICH. if rich (vastly) the cat can overheat. and fail that test. you need to post all facts, in my questions. first.

Sep 11, 2013 | Mitsubishi Lancer Cars & Trucks

1 Answer

Error p2188 p2119
The first one shows the engine running more that 34 % rich.
check engine compression.
check spark
check fuel pressure.
all 3 are ok, check for leaking injectors or clogged.

Apr 26, 2013 | 2007 Suzuki XL-7

1 Answer

Scanner code dtc:26 mixture control continuously rich. How do i fix? 1993 toyota t100 v6

DTC Code 26 Air/fuel ratio RICH

Did you GAP the plugs right? If not, that code will appear on it and a bad O2 sensor will cause it to give off that code also,have someone with a good scanner read and monitor the O2 sensors on it while its running and that will tell you if they are with in range; if not replace the bad ones on it.

Hope helped (remember comment and rated this).

Jul 25, 2010 | Cars & Trucks

1 Answer

Po420 bank 1 and po430 bank 2 error codes

sounds like O2 sensors to me. I havent changed one on a mustang yet but I havent had any trouble with any others that I have done, they screw in like a spark plug but you will need a special tool, I hope this helps you.

May 13, 2010 | 2007 Ford Mustang GT California Special...

2 Answers

91 chevy 4.3 v-6 runs extremely rich when engine is cold gives codes 13, 33 and 54 I know what these codes are but I need to know is could the computer coolant temp sensor or the air cleaner temp sensor...

DTC - 13 Oxygen sensor circuit open or no activity
DTC - 33 MAP sensor circuit error (signal high indicating low vacuum)
DTC - 54 Fuel pump circuit low voltage

Start with checking the wire leads to the O2 sensors and MAP sensor. Look for any damages to the wire harness and replace any parts damaged or faulty.

The O2 and MAP sensor take reading and sends it to the ECM to recalibrate the fuel injector pulse to adjust the amount of fuel entering the cylinders. When there is an issue to the O2 sensor or MAP sensor and even both, the ECM will be set a a factory default to run rich to keep the engine running and at times the engine may not even run. Normal fuel to air ratio is 14.7:1 - 14.7 air to 1 parts fuel and at default it could be as high as 12.5:1. Good luck and keep me posted, be glad to help you get your truck running 100% again soon and please rate. replacing the thermostat and temperature sensor would also be a good thing since the 4.3 runs best at 190".

Jan 10, 2010 | 1991 Chevrolet S-10

1 Answer

1991 chevy lumina will hardly run

DTC - 22 Throttle position sensor error (signal low), is tps connected?
DTC - 23 Intake air temp sensor error (low temp indicated) check and make sure the sensor is connected
DTC - 43 Knock sensor error, ignore this for now, will not cause rich run.
DTC - 53 System voltage too high, check reference voltage from PCM, it should be around 4.5 Volts, this could be the cause of all your problems, the computer will need to replaced almost for sure.

Oct 06, 2008 | Chevrolet Lumina Cars & Trucks

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