P0420 Catalyst System Ua Tau Zoo Hauv Qab Qhov Pib

Kev piav qhia txog kev ua yuam kev P0420

Catalyst System Efficiency hauv qab qhov pib (Bank 1)

Code P0420 txhais li cas?

Qhov Diagnostic Trouble Code (DTC) no yog ib txoj cai xa mus thoob plaws. Nws tau txiav txim siab thoob ntiaj teb raws li nws siv rau txhua tus ua thiab qauv tsheb (1996 thiab tshiab dua), txawm hais tias cov kev kho tshwj xeeb yuav txawv me ntsis nyob ntawm tus qauv. Yog li tsab xov xwm no nrog cov cim cav siv rau Nissan, Toyota, Chevrolet, Ford, Honda, GMC, Subaru, VW, thiab lwm yam.

P0420 yog ib qho ntawm cov teeb meem feem ntau peb pom. Lwm cov lej nrov suav nrog P0171, P0300, P0455, P0442, thiab lwm yam. Yog li nco ntsoov bookmark lub xaib no rau yav tom ntej siv!

Lub catalytic converter yog ib feem ntawm cov pa tawm uas zoo li lub muffler, txawm hais tias nws txoj haujlwm txawv ntawm qhov muffler. Txoj haujlwm ntawm lub catalytic converter yog los txo cov pa emissions.

Lub catalytic converter muaj cov pa oxygen nyob rau sab xub ntiag thiab tom qab. Thaum lub tsheb tau sov thiab ua haujlwm nyob rau hauv kaw lub voj hom, lub teeb liab nyeem ntawm cov pa oxygen sensor yuav tsum hloov pauv. Kev nqes dej O2 sensor nyeem ntawv yuav tsum ruaj khov. Feem ntau, tus lej P0420 yuav qhib lub tswb cav lub teeb yog tias nyeem ntawm ob lub ntsuas hluav taws xob zoo ib yam. Cov pa oxygen tseem hu ua O2 sensors.

Qhov no qhia (ntawm lwm yam) uas tus hloov pauv tsis ua haujlwm zoo li nws yuav tsum tau (raws li qhov tshwj xeeb). Cov hloov pauv catalytic feem ntau tsis cais raws li "hnav tawm," lub ntsiab lus lawv tsis hnav thiab tsis tas yuav hloov pauv. Yog tias lawv ua tsis tiav, yuav muaj feem yog vim lwm yam uas ua rau muaj kev sib tsoo. Nov yog qhov P0420 sawv rau hauv txoj kev yooj yim.

Cov tsos mob ntawm kev ua yuam kev P0420

Thawj qhov tsos mob rau tus tsav tsheb yog MIL teeb pom kev zoo. Koj yuav zoo li yuav tsis pom muaj teeb meem daws teeb meem, txawm hais tias yuav muaj tsos mob tshwm sim. Piv txwv li, yog tias cov khoom siv sab hauv lub tshuab hloov pauv catalytic tau tawg lossis tsis ua tiav, nws tuaj yeem txwv kev tso cov pa tso tawm, ua rau muaj kev xav ntawm txo lub zog tsheb tso tawm.

• Tsis muaj cov tsos mob tshwm sim lossis kev daws teeb meem (feem ntau)
• Xyuas kom lub cav lub teeb yog nyob rau
• Tsis muaj zog tom qab lub tsheb sov
• Lub tsheb ceev tsis tuaj yeem tshaj 30-40 mph
• Rotten qe tsw los ntawm qhov tso pa tawm

Ua rau P0420 code

Txoj cai P0420 tuaj yeem txhais tau tias ib lossis ntau qhov xwm txheej hauv qab no tau tshwm sim:

• Cov roj coj los siv qhov twg yuav tsum tau siv roj tsis siv (tsis zoo li)
• Puas lossis tsis ua pa / O2 sensor
• Cov pa oxygen hauv qab (HO2S) thaiv puas lossis txuas tsis raug
• Lub ntsuas cua txias lub cav txias ua haujlwm tsis zoo
• Puas los yog xau qhov tso pa tawm ntau yam / catalytic hloov pauv / muffler / tso pa tawm
• Ua tsis tau lossis tsis muaj txiaj ntsig zoo catalytic converter (yuav muaj)
• Ignition ncua
• Cov pa oxygen nyob rau hauv pem hauv ntej thiab tom qab lub transmitter tau muab nyeem zoo ib yam nkaus.
• Leak roj injector los yog siab roj siab
• Misfire lub tog raj kheej
• Roj paug

Cov kev daws teeb meem

Qee qhov kev qhia pom zoo rau kev daws teeb meem thiab kho P0420 txoj cai suav nrog:

• Txheeb xyuas cov pa tawm hauv cov manifold, cov kav dej, cov hloov pauv catalytic. Kho yog tsim nyog.
• Siv lub oscilloscope los kuaj xyuas cov pa oxygen (Hint: cov pa oxygen nyob rau hauv pem hauv ntej ntawm cov hloov pauv catalytic feem ntau muaj cov qauv oscillating. Cov yoj ntawm lub sensor tom qab hloov pauv yuav tsum ruaj khov dua).
• Tshawb xyuas qhov ntsuas cua oxygen qis dua thiab hloov yog tsim nyog.
• Hloov catalytic converter.

Kev qhia tshuaj

Feem ntau hais lus, koj tuaj yeem pom qhov ntsuas cua sov ua ntej thiab tam sim ntawd tom qab hloov pauv nrog lub ntsuas cua infrared. Thaum lub cav ua kom sov tag nrho, qhov ntsuas kub yuav tsum yog li 100 degrees Fahrenheit siab dua.

Zuag qhia tag nrho, tej zaum qhov yuam kev loj tshaj plaws cov tswv tsheb ua thaum lawv muaj P0420 chaws yog los hloov cov pa oxygen sensor (sensor 02). Nws yog ib qho tseem ceeb rau kev kuaj xyuas kom raug kom tsis txhob nkim nyiaj ntawm qhov tsis tsim nyog hloov pauv.

Peb pom zoo kom hais tias yog tias koj xav tau hloov cov catalytic converter, hloov nws nrog tus thawj chaw tsim khoom lag luam cov khoom lag luam (piv txwv li tau txais los ntawm lub khw muag khoom). Qhov kev xaiv thib ob yog qhov hloov pauv zoo, xws li kev cai lij choj 50-xeev miv. Muaj ntau ntau zaj dab neeg ntawm peb lub rooj sab laj ntawm cov neeg hloov ib tug miv nrog ib tug pheej yig dua tom qab muag ib tug xwb kom muaj cai rov qab sai tom qab.

Nws yuav tsum raug sau tseg tias ntau lub tuam txhab tsim tsheb muab kev lees paub ntev dua ntawm cov pa nkev ntsig txog ntu. Yog li ntawd, yog tias koj muaj lub tsheb tshiab dua tab sis tsis tau them los ntawm kev tiv thaiv lub bumper-rau-bumper, tseem yuav muaj kev lees paub rau hom teeb meem no. Ntau lub chaw tsim khoom muab cov khoom no nrog rau tsib-xyoo tsis suav nrog kev lees paub. Nws tsim nyog txheeb xyuas.

YUAV UA LI CAS MECHANIC DIAGNOSIS A P0420 CODE?

• Siv OBD-II scanner los khaws cov teeb meem ntawm PCM.
• Tso tawm cov ntaub ntawv nyob ntawm qhov qis qis (sab tom qab) oxygen sensor. Lub downstream oxygen sensor voltage nyeem ntawv yuav tsum tsis tu ncua. Txiav txim siab seb qhov dej ntws qis (rov qab) oxygen sensor ua haujlwm zoo.
• Ntsuam xyuas lwm cov lej uas yuav ua rau DTC P0420.
• Kho misfiring, misfiring thiab/los yog roj system teeb meem raws li xav tau.
• Tshawb xyuas lub tsheb oxygen sensor rau kev puas tsuaj thiab / lossis hnav ntau dhau.
• Kev sim tsav lub tsheb saib cov ntaub ntawv khov nab kuab los txiav txim siab seb qhov chaw qis qis (rov qab) oxygen sensor ua haujlwm zoo.
• Xyuas seb muaj PCM hloov tshiab yog tias lub catalytic converter tsis raug. Tom qab hloov cov catalytic converter, PCM hloov tshiab yuav tsum tau.

COMMON yuam kev thaum kuaj xyuas tus lej P0420

Qhov yuam kev tshaj plaws yog hloov cov pa oxygen sensors ua ntej cov txheej txheem kuaj mob tiav. Yog tias lwm qhov cuam tshuam ua rau P0420 teeb meem code, hloov cov pa oxygen sensors yuav tsis kho qhov teeb meem.

YUAV TSUM TAU TXAIS P0420 YOG?

Nws yog ib txwm ua rau tus neeg tsav tsheb tsis muaj teeb meem thaum muaj P0420 DTC. Lwm yam tshaj li lub teeb Check Engine tau qhib, cov tsos mob ntawm DTC no tuaj yeem tsis pom. Txawm li cas los xij, yog tias lub tsheb raug tso tseg los ntawm kev ua yuam kev yam tsis tau daws qhov teeb meem, nws tuaj yeem ua rau muaj kev puas tsuaj loj rau lwm cov khoom.

Txij li thaum tsis muaj cov tsos mob ntawm kev daws teeb meem cuam tshuam nrog DTC P0420, qhov no tsis suav tias yog qhov hnyav lossis txaus ntshai rau tus neeg tsav tsheb. Txawm li cas los xij, yog tias tus lej tsis raug kho raws sijhawm, lub catalytic converter yuav raug puas tsuaj loj. Vim tias kev kho catalytic converter yog kim, nws yog ib qho tseem ceeb uas DTC P0420 raug kuaj xyuas thiab kho sai li sai tau.

Kev kho dab tsi tuaj yeem kho tus lej P0420?

• Hloov muffler los yog kho cov muffler leaks
• Hloov cov pa tawm manifold los yog kho cov pa tawm manifold.
• Hloov cov kav dej los yog kho cov kav dej xau.
• Hloov cov catalytic converter (feem ntau)
• Hloov Cav Coolant Kub Sensor
• Hloov cov pa oxygen sensor rau pem hauv ntej lossis nram qab
• Kho lossis hloov cov xaim puas rau oxygen sensors.
• Kho lossis hloov oxygen sensor connectors
• Hloov lossis kho cov roj injectors
• Tshuaj ntsuam xyuas tej teeb meem misfiring
• Ntsuam xyuas thiab kho lwm yam teeb meem kev cai uas tau muab khaws cia los ntawm lub hwj chim tswj module (PCM).

YUAV TSUM TAU TXAIS NTAWM CODE P0420

Teeb meem nrog lub tshuab hluav taws xob, roj system, cua nkag, thiab hluav taws xob tsis zoo tuaj yeem ua rau lub catalytic converter puas yog tias tsis daws sai. Cov khoom no yog qhov ua rau DTC P0420 feem ntau. Thaum hloov lub catalytic converter, nws raug nquahu kom hloov nws nrog lub qub chav tsev lossis lub siab zoo oxygen sensor.

Tom qab cov pa oxygen sensors feem ntau poob, thiab thaum qhov no tshwm sim, P0420 teeb meem code tuaj yeem rov tshwm sim. Koj yuav tsum tau hu rau cov chaw tsim khoom kom pom tias koj lub tsheb puas raug them los ntawm cov chaw tsim khoom lag luam ntawm cov khoom muaj feem cuam tshuam.

Yuav kho P0420 Cav Code li cas hauv 3 feeb [3 Txoj Kev / Tsuas yog $19.99]

Xav tau kev pab ntxiv nrog tus lej p0420?

Yog tias koj tseem xav tau kev pab nrog DTC P0420, tshaj tawm cov lus nug hauv cov lus hauv qab kab lus no.

NCO TSEG. Cov ntaub ntawv no yog muab rau lub hom phiaj xov xwm nkaus xwb. Nws tsis yog lub hom phiaj yuav siv los ua kev qhia kho thiab peb tsis muaj lub luag haujlwm rau ib qho kev nqis tes ua uas koj ua ntawm txhua lub tsheb. Txhua cov ntaub ntawv ntawm lub xaib no raug tiv thaiv los ntawm txoj cai.