P20D7 Exhaust Gas Hoʻolālā Pūnaewele ʻAi Mīkini Pūnaewele / Open

P20D7 Exhaust Gas Hoʻolālā Pūnaewele ʻAi Mīkini Pūnaewele / Open

Papa Kuhikuhi DTC OBD-II

Hoʻopau kinoea aftertreatment ʻōnaehana kaohi hoʻokele kaapuni / wehe

He aha keʻano o kēia?

ʻO kēia Diagnostic Trouble Code (DTC) kahi code transmic generic a pili i nā kaʻa he nui OBD-II (1996 a hou). Pākuʻi ʻia paha kēia, akā ʻaʻole kau palena ʻia ia, VW, Audi, Mercedes Benz, Ford, Mitsubishi, a pēlā aku. ʻOiai ke ʻano maʻamau, ʻokoʻa paha nā kaʻina hana kūpono e like me ka makahiki hoʻohālikelike, hana, hoʻohālikelike a me ka hoʻonohonoho hoʻoili.

ʻO kahi code P20D7 i mālama ʻia i loko o kāu kaʻa diesel ʻo ia hoʻi ka mana o ka mana powertrain (PCM) ʻaʻole i ʻike ʻia ka uila ma ke kaapuni kahe wahie ma hope.

Hoʻohana ʻia kahi Exhaust Aftertreatment System (i kapa ʻia he Selective Catalyst Recovery System) e hoʻomaikaʻi ai i nā hiki o ka ʻōnaehana māpuna catalytic exhaust gas. Hiki iā ia ke komo i hoʻokahi aʻoi aku paha o kēia mau mea; diesel oxidation catalyst, particulate filter, reductant injection system, amonia slip catalyst a me nitrogen oxide (NOx) pahele.

ʻO kahi ʻōnaehana hoʻoiho reductant i loko o ka liʻiliʻi o hoʻokahi mea hoʻoheheʻe reductant, kahi pahu mālama mālama reductant, a me nā laina wahie hōʻemi kiʻekiʻe. Aia i loko o ka pahu wai a i ʻole i ka laina lako pono wahie kahi uila uila kiʻekiʻe. Ma ke kaapuni e kaohi ana i kēia pauma hānai i ʻike ʻia ka hewa mālama o ka P20D7.

Ma waena o nā mea ʻē aʻe, nā ʻōnaehana māhu ma hope o ka mālama ʻana (EAS) ke kuleana no ka hoʻopili ʻana i kahi hui reductant / diesel engine fluid (DEF) i loko o nā kinoea hoʻolāʻau i uka o ke kānana kikoʻī, NOx hei a me / a i ʻole hoʻololi catalytic ma o kahi mālama wai paʻa. a me ka ʻōnaehana injection. ʻO nā inikua DEF i helu pono ʻia e hāpai i ka mahana o nā ʻano kānana like ʻole a hiki iā lākou ke hana me ka maikaʻi. Hoʻonui ka hoʻohui o DEF i ka ʻōnaehana catalytic i ke ola o ka mea kānana a hoʻemi i ka hoʻokuʻu ʻana o nā kinoea hoʻoluhi ʻino i ka lewa.

Nānā a kāohi ʻia nā ʻōnaehana EAS e ka PCM a i ʻole kahi mea kū kaʻawale (kahi e launa pū me ka PCM). Mālama ka mea hoʻokele i ka kaomi i ka ʻōnaehana hoʻoheheʻe reductant, ka O2, NOx a me nā mea aniani mahana kinoea (a me nā mea hoʻokomo ʻē aʻe) e hoʻoholo ai i ka manawa kūpono no ka injection DEF (reductant).

Ināʻike ka PCM i ka nele o ka uila i ke kaapuni EAS fuel pump control, e mālama ʻia kahi code P20D7 a hoʻomālamalama ʻia ke kukui hōʻike malfunction.

He aha ke koʻikoʻi o kēia DTC?

Pono e mālama ʻia kahi pāʻālua P20D7 i mālama ʻia e like me ke koʻikoʻi a hoʻoponopono ʻia i ka wā hiki loa. Hiki ke hōʻino ʻia ka ʻōnaehana EAS ma muli o nā kūlana i kōkua i ka hoʻomau o ka code P20D7.

He aha kekahi o nā ʻōuli o ke code?

Nā hōʻailona o kahi P20D7 pilikia code e hoʻopili pū paha:

• Hoʻoiho mīkini hana
• Puhi ʻeleʻele nui loa mai ka hoʻoluhi kaʻa
• Hoemi i ka pono wahie
• Nā pāʻālua ʻē aʻe e pili ana iā EAS / SCR

He aha kekahi o nā kumu maʻamau no ke code?

Hiki i nā kumu no kēia code ke:

• Pauma wahie EAS ʻino
• Meaʻike hewa puʻe kina ʻole EAS
• E wehe a i ʻole ke kaapuni pōkole i ke kaapuni mana lako EAS
• ʻAʻole lawa ʻo DEF i ka waihona wai EAS
• ʻO ka mea hoʻoponopono maikaʻi EAS / PCM a i ʻole hemahema o ka papahana

He aha kekahi o nā hanana hoʻonā pilikia P20D7?

Ke noi nei i kahi pāʻālua P20D7 e koi i kahi scanner diagnostic, volt / ohmmeter digital (DVOM), a me kahi kumuwaiwai diagnostic kikoʻī kaʻa.

E ʻimi no ka Bulletin Service Kōmike (TSB) i kūlike i ka makahiki o ka hana ʻana, hana a hoʻohālikelike o ke kaʻa; a me ka neʻe ʻana o ka ʻenekini, nā code i mālama ʻia, a me nā ʻōuli i ʻike ʻia hiki ke hāʻawi i ka ʻike diagnostic pono.

Makemake wau e hoʻomaka i kaʻu kuhi na ka nānā ʻana i nā pale uila EAS a me nā mea hoʻopili. Pono e hoʻoponopono hou ʻia a puhi paha nā wili a / a i ʻole nā ​​mea hoʻopili ma mua o ka holo ʻana.

E hoʻomaka wau ma ka hoʻohui ʻana i ka scanner i ka hoʻopili diagnostic o ke kaʻa a kiʻi hou i nā pāʻālua i mālama ʻia a me nā ʻikepili pili manu paʻa e pili ana. Hana i kahi leka i kēia ʻike ma mua o ka holoi ʻana i nā pāʻālua. E hoʻāʻo e hoʻokele i ka kaʻa a hiki i ka komo ʻana o ka PCM i kahi ʻano mākaukau a hoʻomaʻemaʻe ʻia ke code.

Inā komo ka PCM i ka mode mākaukau i kēia manawa, intermittent ke code a hiki ke ʻoi aku ka paʻakikī e kuhikuhi. Inā pēlā, pono e hōʻino nā kūlana i hāʻawi i ka paʻa ʻana o ke code ma mua o ka hiki ke hana i kahi ʻike pololei.

Inā hoʻihoʻi koke ke code, e koi ka ʻanuʻu diagnostic hou e ʻimi i ke kumu ʻike kaʻa no nā kiʻikuhi poloka diagnostics, pinouts, nā helehelena hoʻohui, a me nā kaʻina hoʻokolohua a me nā kikoʻī.

E hoʻohana i ka DVOM e nānā (kulu uila) ma nā kahua ʻōnaehana wahie EAS āpau. E hoʻomau i ka hoʻāʻo ʻana i ka lako mana ʻōnaehana EAS. E hōʻoia i nā fuse me kahi kaapuni i hoʻoili ʻia e hōʻalo i nā kuhi hewa. Inā loaʻa ka mana pololei (ka uila uila) a me nā kaapuni honua, hoʻohana i ka scanner e hoʻohuli i ka pauma wahie EAS a nānā i ka anakahi uila kaohi anakuhi. Inā ʻaʻole lawa ka uila, e nānā i ka EAS fuel pump relay. Inā ʻaʻole e ʻike ʻia kahi uila komo, e manaʻo ʻoe he hewa ʻole ka mea hoʻomalu a i ʻole he hemahema papahana. Inā loaʻa kahi anakuhi uila i ka mika akā ʻaʻole ʻike ʻia kahi anakahi uila, manaʻo ʻia he hewa ka relay.

Inā aia ke kaapuni uila hoʻopuka o ka mana EAS ma waena o nā palena, e hoʻohana i ka DVOM e hoʻāʻo i ka sensor pressure pressure EAS a me ka pauma wahie. Inā ʻaʻole kū kekahi o kēia mau mea i nā kikoʻī a ka mea hana, manaʻo ʻoe he hewa ia.

• Mai poina i nā puka lou o ka honua ke hōʻike i ka hāʻule ʻana o ka uila

Nā kūkākūkā DTC e pili ana

• ʻAʻohe kumuhana pili i kēia manawa i kā mākou kolamu. Kau i kahi kumuhana hou ma ke kolamu i kēia manawa.

Pono i ke kōkua hou me kahi code P20D7?

Inā makemake ʻoe i kōkua me DTC P20D7, kau i kahi nīnau i nā manaʻo ma lalo o kēia ʻatikala.

OLELO HOOLAHA. Hāʻawi ʻia kēia ʻike no ka ʻike wale nō. ʻAʻole ia e manaʻo ʻia e hoʻohana ʻia ma ke ʻano he ʻōlelo hoʻomaikaʻi a ʻaʻole kuleana mākou no kekahi hana āu e hana ai i kekahi kaʻa. Pale ʻia ka ʻike āpau ma kēia pūnaewele e nā kuleana kope.