P0781 Gear Shift Malfunction 1-2

P0781 – OBD-II Teeb meem Code Technical Description

Teeb meem code P0781 qhia tias PCM tau kuaj pom muaj teeb meem thaum hloov ntawm 1rd mus rau 2th iav.

Qhov txhaum cai txhais li cas P0781?

Teeb meem code P0781 qhia tias muaj teeb meem nrog kev hloov ntawm thawj mus rau ob lub iav hauv qhov tsis siv neeg kis. Qhov no txhais tau hais tias lub cav tswj module (PCM) tau kuaj pom tus cwj pwm txawv txawv lossis txawv txav thaum lub sij hawm hloov cov txheej txheem, uas tej zaum yuav muaj feem xyuam rau cov solenoid li qub, hydraulic circuits, los yog lwm yam kis tau tus mob.

Tej zaum ua rau

Qee qhov ua tau rau P0781 teeb meem code yog:

• Solenoid valve tsis ua haujlwm: Cov solenoid li qub uas tswj cov iav hloov yuav raug puas, daig, lossis muaj teeb meem hluav taws xob.
• Teeb meem nrog hydraulic circuits: Lub siab tsis raug lossis thaiv hauv qhov kis tau tus mob hydraulic circuits tuaj yeem tiv thaiv kev hloov pauv ntawm lub cev.
• Malfunction ntawm ceev sensors: Faulty los yog qias neeg ceev sensors yuav ua rau lub PCM misinterpret lub tsheb ceev cov ntaub ntawv, uas yuav cuam tshuam lub iav hloov.
• Cov teeb meem ntawm kev sib kis: Tsawg los yog tsis muaj paug kis tau tus mob yuav txo tau siab los yog muab lubrication tsis zoo, ua rau muaj teeb meem hloov.
• Cav tswj module (PCM) malfunction: Kev ua haujlwm tsis zoo hauv PCM, uas yog lub luag haujlwm los tswj kev sib kis, tuaj yeem ua rau muaj kev hloov pauv tsis raug.
• Mechanical teeb meem nyob rau hauv lub gearbox: Kev puas tsuaj los yog hnav rau hauv cov khoom sib kis, xws li clutches lossis couplings, tuaj yeem ua rau P0781.

Cov no tsuas yog qee qhov laj thawj, thiab txhawm rau txiav txim siab qhov teeb meem kom raug, nws raug nquahu kom ua qhov kev kuaj mob dav dav ntawm lub tsheb sib kis.

Cov tsos mob ntawm tus lej yuam kev yog dab tsi? P0781?

Qee cov tsos mob tshwm sim ntawm teeb meem code P0781:

• Nyuaj hloov cov iav: Lub tsheb yuav muaj teeb meem hloov ntawm thawj mus rau ob lub iav. Qhov no yuav tshwm sim nws tus kheej raws li kev ncua ntawm kev hloov lub zog los yog jerking thaum hloov.
• Lub tsheb tsis zoo los yog jerky txav: Thaum hloov lub zog ntawm thawj mus rau thib ob, lub tsheb yuav txav tsis sib xws los yog jerkly, uas yuav pom tau rau tus neeg tsav tsheb thiab cov neeg caij tsheb.
• Cov suab txawv txawv: Cov suab nrov txawv txav, xws li khob, sib tsoo lossis lub suab nrov nrov, yuav tshwm sim thaum hloov lub zog lossis thaum lub tsheb txav.
• Xyuas lub cav qhov taw qhia lub teeb: Code P0781 activates lub Check Engine lub teeb ntawm lub tsheb dashboard. Qhov no tej zaum yuav yog thawj qhov teeb meem rau tus tsav tsheb.
• Kev txwv kev ua haujlwm: Kev hloov iav tsis raug yuav txwv lub tsheb lub zog lossis kev nrawm.
• Emergency operation mode (limp mode): Qee qhov xwm txheej, lub tsheb yuav nkag mus rau hauv hom tsis pom kev los tiv thaiv kev puas tsuaj ntxiv, uas yuav muaj kev txwv ceev lossis lwm yam kev txwv.

Yuav ua li cas kuaj tau tus lej txhaum P0781?

Txhawm rau kuaj xyuas DTC P0781, ua raws li cov kauj ruam no:

1. Kev txheeb xyuas cov lej yuam kev: Siv lub tshuab kuaj kab mob los nyeem cov lej yuam kev los ntawm lub cav tswj module (PCM). Xyuas kom tseeb tias P0781 code yog tam sim no.
2. Tshawb xyuas lwm cov lej yuam kev: Txheeb xyuas lwm cov lej yuam kev, xws li cov lej muaj feem cuam tshuam nrog kev sib kis lossis ceev sensors. Qhov no yuav pab txheeb xyuas cov teeb meem ntxiv uas tej zaum yuav cuam tshuam txog qhov tshwm sim.
3. Tshawb xyuas cov kua dej sib kis: Txheeb xyuas qib thiab qhov xwm txheej ntawm cov kua dej sib kis. Cov kua dej tsawg lossis muaj paug tuaj yeem ua rau muaj teeb meem sib kis.
4. Hluav taws xob ntsuas hluav taws xob: Txheeb xyuas cov hluav taws xob hluav taws xob, kev sib txuas thiab cov khoom sib txuas uas cuam tshuam nrog kev hloov pauv solenoid valve. Nco ntsoov tias cov xov hlau tsis tawg, cov khoom sib txuas tau ruaj khov, thiab tsis muaj cov cim qhia ntawm corrosion.
5. Tshawb xyuas qhov ceev sensors: Txheeb xyuas qhov kev ua haujlwm thiab qhov xwm txheej ntawm cov sensors ceev, raws li cov teeb liab tsis raug los ntawm lawv tuaj yeem ua rau muaj teeb meem nrog kev hloov iav.
6. Solenoid valve diagnostics: Kuaj qhov hloov pauv solenoid valve kom paub meej tias kev ua haujlwm zoo.
7. Tshawb xyuas lwm cov khoom sib kis: Nyob ntawm cov txiaj ntsig ntawm cov kauj ruam dhau los, kev kuaj mob ntxiv yuav tsum tau kuaj xyuas lwm cov khoom sib kis, xws li hydraulic li qub lossis clutches.
8. PCM Software Check: Hloov kho lossis rov kho PCM software yog tias tsim nyog.
9. Kev kuaj ntxiv: Yog tias tsim nyog, ua qhov kev sim thiab kev kuaj mob ntxiv los txiav txim qhov ua rau ntawm qhov teeb meem.

Tom qab kuaj xyuas thiab txiav txim qhov ua rau ntawm qhov teeb meem, koj tuaj yeem pib kho lossis hloov cov khoom tsis raug.

Kev kuaj mob yuam kev

Thaum kuaj pom DTC P0781, cov teeb meem hauv qab no yuav tshwm sim:

• Hla kev ntsuas hluav taws xob Circuit Court: Nws yog ib qho tseem ceeb los xyuas cov hluav taws xob hluav taws xob, kev sib txuas thiab cov khoom sib txuas uas cuam tshuam nrog kev hloov pauv solenoid valve. Kev hla cov kauj ruam no tuaj yeem ua rau qhov teeb meem tsis raug kuaj pom.
• Misinterpretation ntawm yuam kev code: Qhov yuam kev yuav yog qhov tsis nkag siab ntawm lub ntsiab lus ntawm tus lej P0781. Nws yog ib qho tsim nyog los txhais cov cai kom raug kom tsis txhob ua yuam kev hauv kev kuaj mob thiab kho.
• Kev sim tsis txaus ntawm lwm cov khoom: Qhov teeb meem yuav tsis tsuas yog nrog lub solenoid valve, tab sis kuj nrog lwm yam kis tau tus mob xws li ceev sensors, hydraulic circuits thiab lwm yam solenoid li qub. Kev sim tsis txaus ntawm cov khoom no yuav ua rau muaj kev kuaj mob tsis raug.
• Txoj kev tsis ncaj ncees rau kev kuaj mob: Nws yog ib qho tseem ceeb uas yuav tsum tau siv cov txheej txheem thiab cov cuab yeej kom raug los kuaj xyuas qhov teeb meem. Txoj kev tsis ncaj ncees los yog kev paub tsis txaus tuaj yeem ua rau cov lus xaus tsis raug.
• Hla kev sim nyob rau hauv cov xwm txheej sib txawv: Qee zaum qhov teeb meem tsuas yog tshwm sim nyob rau hauv qee lub tsheb khiav haujlwm, xws li thaum lub cav ua kom sov. Kev hla kev sim nyob rau hauv cov xwm txheej sib txawv tuaj yeem ua rau tsis raug txheeb xyuas qhov ua rau ntawm qhov teeb meem.
• Tsis quav ntsej cov neeg tsim khoom cov lus pom zooNco tseg: Cov chaw tsim khoom tuaj yeem muab cov lus qhia tshwj xeeb rau kev kuaj mob thiab kho cov teeb meem no. Tsis quav ntsej cov lus pom zoo no yuav ua rau muaj kev kho tsis raug lossis teeb meem ntxiv.

Zam zam cov kev ua yuam kev no los ntawm kev kuaj xyuas kom meej thiab ua tiav ntawm qhov teeb meem los txiav txim siab thiab daws qhov ua rau P0781 teeb meem code.

Txoj cai txhaum loj npaum li cas? P0781?

Teeb meem code P0781 qhia txog qhov teeb meem hloov pauv hauv kev sib kis tsis siv neeg. Txawm hais tias qee zaus qhov teeb meem yuav yog me me thiab tshwm sim los ntawm kev tsis sib haum xeeb ib ntus, hauv lwm qhov nws yuav hnyav dua thiab xav tau kev saib xyuas tam sim. Qhov hnyav ntawm P0781 code nyob ntawm ntau yam:

• Tsheb coj cwj pwm: Yog tias lub tsheb muaj teeb meem hloov lub zog, nws yuav ua rau kev tuav tsis zoo, kev nrawm nrawm, lossis txawm tias tsis muaj kev tswj ntawm lub tsheb, ua rau qhov teeb meem loj dua.
• Emergency operation mode (limp mode): Qee zaum, lub tsheb yuav nkag mus rau hauv hom qis kom tiv thaiv kev puas tsuaj ntxiv. Qhov no tuaj yeem txwv lub tsheb kev ua haujlwm thiab ua rau nws tswj tsis tau.
• Tej zaum kev puas tsuaj mus ntev: Kev hloov iav tsis raug tuaj yeem ua rau muaj kev puas tsuaj rau cov khoom sib kis, uas yuav xav tau kev kho kom zoo lossis hloov pauv.
• Kev ruaj ntseg: Kev hloov iav tsis raug tuaj yeem cuam tshuam rau kev nyab xeeb ntawm lub tsheb, tshwj xeeb tshaj yog thaum tsav tsheb ntawm kev kub ceev lossis hauv txoj kev nyuaj.

Raws li cov saum toj no, teeb meem code P0781 yuav tsum tau ua tiag tiag. Nws raug nquahu kom koj muaj tus kws kho tsheb tsim nyog lossis lub khw kho tsheb kuaj xyuas thiab kho qhov teeb meem sai li sai tau txhawm rau tiv thaiv kev puas tsuaj ntxiv thiab ua kom muaj kev nyab xeeb thiab kev ntseeg siab ntawm koj lub tsheb.

Kev kho dab tsi yuav daws tau tus lej P0781?

Kev kho tus lej P0781 yuav xav tau ntau yam kev kho, nyob ntawm qhov ua rau ntawm qhov teeb meem, ntau txoj hauv kev kho tau yog:

1. Hloov lossis kho qhov hloov pauv solenoid valve: Yog tias qhov teeb meem nrog lub solenoid valve, nws yuav tsum tau hloov lossis kho. Qhov no yuav suav nrog kev kuaj xyuas qhov ua haujlwm ntawm lub valve thiab hloov nws nrog ib qho tshiab yog tias nws tsis raug.
2. Kho lossis hloov cov hydraulic circuits: Teeb meem nrog cov hydraulic circuits tuaj yeem tiv thaiv kev hloov pauv ntawm lub cev. Hauv qhov no, lawv yuav tsum tau kho lossis hloov.
3. Hloov cov kua dej sib kis: Cov kua dej sib kis tsawg lossis tsis muaj paug tuaj yeem ua rau muaj teeb meem hloov pauv. Hloov cov kua dej tuaj yeem pab daws qhov teeb meem no.
4. Kho lossis hloov lwm yam khoom sib kis: Teeb meem nrog lwm yam kis tau tus mob, xws li ceev sensors lossis lwm yam solenoid li qub, tuaj yeem ua rau P0781. Hauv qhov no, lawv yuav tsum tau kho lossis hloov.
5. Hloov kho lossis reprogramming PCM: Qee zaum, qhov teeb meem yuav cuam tshuam nrog lub cav tswj module (PCM) software. Hauv qhov no, PCM yuav tsum tau hloov kho lossis rov ua dua tshiab.

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias txhawm rau txheeb xyuas thiab kho qhov teeb meem kom raug, nws raug nquahu kom hu rau tus kws kho tsheb tsim nyog lossis lub chaw pabcuam tsheb. Kev kho tsis raug yuav ua rau muaj teeb meem ntxiv lossis rov tshwm sim ntawm qhov yuam kev.

Yuav kuaj thiab kho li cas P0781 Cav Code - OBD II Trouble Code piav qhia

P0951 - Cov ntaub ntawv tshwj xeeb ntawm hom

Deciphering P0781 teeb meem code rau qee hom tsheb tshwj xeeb:

1. Toyota / Lexus:
   • P0781: Hloov yuam kev ntawm 1st mus rau 2nd iav
2. Ford:
   • P0781: Ua haujlwm tsis zoo thaum hloov ntawm 1st mus rau 2nd iav
3. Chevrolet / GMC:
   • P0781: Hloov yuam kev ntawm 1st mus rau 2nd iav
4. Honda/Acura:
   • P0781: Ua haujlwm tsis zoo thaum hloov ntawm 1st mus rau 2nd iav
5. Nissan / Infiniti:
   • P0781: Ua haujlwm tsis zoo thaum hloov ntawm 1st mus rau 2nd iav
6. Hyundai/Kia:
   • P0781: Hloov yuam kev ntawm 1st mus rau 2nd iav
7. Volkswagen/Audi:
   • P0781: Yuam kev thaum hloov ntawm 1st mus rau 2nd iav
8. BMW:
   • P0781: Ua haujlwm tsis zoo thaum hloov ntawm 1st mus rau 2nd iav
9. Mercedes-Benz:
   • P0781: Hloov yuam kev ntawm 1st mus rau 2nd iav
10. Subaru:
    • P0781: Ua haujlwm tsis zoo thaum hloov ntawm 1st mus rau 2nd iav

Cov no yog cov lej P0781 rau ntau hom tsheb. Yog xav paub meej ntxiv, nws raug nquahu kom xa mus rau cov lus qhia tshwj xeeb lossis cov ntaub ntawv muab los ntawm cov chaw tsim khoom.