It might be a controversial question, but is it possible at all to electronically disable the limp mode function?
Whilst the limp mode could at times be preventable by i.e. maintaining fuel above the minimum level etc., it tends to turn on in my CRV67 whenever the Check System warning light comes on (not always but often), as if the engine was trying to save itself from something. In my experience, sudden change to limp mode which is making the car very sluggish and barely responsive on the road, can in some situations be very dangerous i.e. driving on a motorway or dual carriageway and being overtaken by lorries at 50-55mph when the car’s acceleration in a limp mode would be significantly below normal acceleration level.
Any ideas/tips on that topic?
13972 příspěvků · Připojeno 2013
Dont think you can disable limp mode, nor should you really be attempting any high speeds given how slow it makes the car in the first place.
Continuing to drive in limp mode risks damaging your engine — you need to get it sorted out first.
6th Gen Honda CR-V Advance Tech Plug-In Hybrid v Crystal Pearl Black
1756 příspěvků · Připojeno 2010
Limp mode cannot be deactivated on automotive applications, but when said engines are used in an emergency power supply situation then the ECM can be configured to run to destruction thus switching off the limp mode.
Concerning your comments you will be given many warning signs and driving indicators before limp mode will will have been activated – At the end of the day limp mode is to protect the engine / vehicle, hence if you have this issue on your motor I would be investigating why – Best guess being as you have not supplied any details is the your EGR or DPF system is blocked.
2011 ES 2.2 iDTEC
729 příspěvků · Připojeno 2022
The only thing you could try is pulling over and turning engine off for approx 30 mins, and then start driving again, but as soon as you trigger the limp mode condition again and you’d be in the same position.
Your first port of call is addressing the fault codes.
M4R3K-CRV67 Discussion starter
8 příspěvků · Připojeno 2023
Thanks for the replies. Just to give you a bit more background and details. The car was checked for faults a few weeks ago and that revealed an error code of the air to fuel sensor, which had to be replaced (Cost ca.£1,2k). After that, the warning light was reset and did not come on again until a few days ago. As soon as the »Check System» Warning Light came on, the limp mode got triggered during driving. Next day, when I was driving the car, the warning light was still on, but the limp mode disappeared and I could drive as normal. A week later, the car was diagnosed again for other errors and this identified an error with low pressure EGR, which now needs to be taken out and checked more directly to asses whether it is faulty and if so, it will require either repair or replacement. The check of EGR itself was quoted as ca. £500 something. The garage said that most probably, the EGR issue has been an knock-on effect from the previous air to fuel sensor issue. This repair / replacement to EGR has not happened yet and the warning light was reset, but I anticipate — since the EGR error was already identified — the warning light can come on any minute (with a possible Limp Mode). The upcoming check of EGR should identify the next course of action.
Anyway, from the general perspective, it is fairly obvious to me that in case of warning lights, these need diagnosing / checking and sorting, but the fundamental question in my mind — deriving from this situation — is whether in your experience the »Check System» Warning Light and the Limp Mode can be triggered only by a serious factor / reason, where there is a real danger of i.e. damaging the engine or it could be triggered by a trivial factor, such as a small error in the electronic system, which can reset itself by turning the engine off and on or by reseting in a different way, if possible at all?
1756 příspěvků · Připojeno 2010
@M4R3K-CRV67
I have entered my comments in red below, also could you answer the questions.
Thanks for the replies. Just to give you a bit more background and details. The car was checked for faults a few weeks ago and that revealed an error code of the air to fuel sensor, (Are you talking about the MAP sensor?) which had to be replaced (Cost ca.£1,2k). After that, the warning light was reset and did not come on again until a few days ago.
As soon as the »Check System» Warning Light came on, the limp mode got triggered during driving. ( Which warning light sign came on see screen shots below) Next day, when I was driving the car, the warning light was still on, but the limp mode disappeared (again which warning sign) and I could drive as normal. A week later, the car was diagnosed again for other errors (What error please explain) and this identified an error with low pressure EGR, which now needs to be taken out and checked more directly to assess whether it is faulty (Sounds like a blocked EGR valve) and if so, it will require either repair or replacement. The check of EGR itself was quoted as ca. £500 something. The garage said that most probably, the EGR issue has been a knock-on effect from the previous air to fuel sensor issue. (I would like to see the test results of the MAP sensor) This repair / replacement to EGR has not happened yet and the warning light was reset, but I anticipate — since the EGR error was already identified — the warning light can come on any minute (with a possible Limp Mode). The upcoming check of EGR should identify the next course of action. (Until the problem is correctly identified then yes limp mode is certainly going to happen)
Anyway, from the general perspective, it is fairly obvious to me that in case of warning lights, these need diagnosing / checking and sorting ,(Yes I agree) but the fundamental question in my mind — deriving from this situation — is whether in your experience the »Check System» Warning Light and the Limp Mode can be triggered only by a serious factor / reason, where there is a real danger of i.e. damaging the engine or it could be triggered by a trivial factor, such as a small error in the electronic system, which can reset itself by turning the engine off and on or by resetting in a different way, if possible at all?
I cannot comment on the underlined comments until the problem is identified correctly and fixed.
My questions to you; are you aware of any fault codes to help diagnose the problem?
2011 ES 2.2 iDTEC
Reactions: Kazoo2U and TheDarkKnight
M4R3K-CRV67 Discussion starter
8 příspěvků · Připojeno 2023
@UK-Kev many thanks for your comments.
Here are the responses to your questions:
— (Are you talking about the MAP sensor?) — The sensor, I am talking about, that had to be replaced by the garage was defined as: »AIR FUEL RATIO SENSOR». Not sure if MAP, you are talking about, would be the same. Tried to search it in the Honda Book, but couldn’t find anything on sensors really. I presume MAP stands for Manifold Absolute Pressure Sensor, but looking at prices of this on Google, they oscillate around tens of £, whereas the dealer cost of the aforementioned »AIR FUEL RATIO SENSOR» was above £700.
— (Which warning light sign came on see screen shots below) — it was neither of the signs on your screenshots. It was Malfunction Indicator Lamp with associated text / display: »CHECK SYSTEM» — see attached dashboard photo (the screenshot below does not show a great deal).
— (What error please explain) — the car was being checked / scanned in the garage, I understand using a diagnostic tool, for any errors that might have caused the warning light to go on. This revealed low pressure EGR error, from what the Garage confirmed to me.
— (Sounds like a blocked EGR valve) — yes, it sounds like that although the garage said that they need to fully remove the low pressure EGR and then check it to see if it’s definitely this. BTW, the quote for removal and check is in excess of £400, which sounds quite substantial just for a check. The quote for EGR repair/replacement has not been given, as they don’t know yet until it’s removed and checked. Does this sound credible to you? Could in this case the best scenario be a blocked EGR, in which case cleaning would do the trick and the worst case scenario a complete EGR replacement? Any idea of expected cost for the latter?
— (I would like to see the test results of the MAP sensor) — I am not sure if it was or it wasn’t tested. I assume it was, but I haven’t been given by the garage any physical evidence such as a printout with testing results etc. Are you suggesting that the garage should have given to me a proof of which errors have been identified on a sheet of paper or in any other physical form? Not sure if that would be their usual practice.
— I cannot comment on the underlined comments until the problem is identified correctly and fixed — Noted & understood.
— »My questions to you; are you aware of any fault codes to help diagnose the problem?» — the only fault codes displayed on my dashboard were as I explained above: Malfunction Indicator Lamp with associated text / display: »CHECK SYSTEM» — see attached dashboard photo. There were no other fault/error codes displayed on the dashboard. As a matter of fact, after the recent visit in the garage, and after I was told that the issue seems to be with low pressure EGR etc., I am currently having no error codes displayed anywhere on the dashboard (they must have been reset after the recent diagnostic session), but I anticipate »CHECK SYSTEM» warning light may come up again any minute i.e. when the engine gets hot after a few miles driven, which happened before.
Anyway, the above are my answers to the questions you have asked. Any thoughts on my further questions, I have asked above? Any thoughts/tips will be appreciated.
Pokud zaznamenáte ztrátu energie a uvidíte na palubní desce nějaké varovné kontrolky, může se stát, že vaše auto vstoupilo do bezobslužného režimu.
Nazývá se to proto, že auto omezí výkon, aby ho ochránilo před možným poškozením, a zároveň mu umožní doplazit se do vaší garáže nebo cíle.
Existuje řada důvodů, proč může auto přejít do bezobslužného režimu, a v tomto článku se podíváme na příznaky, příčiny a možná řešení tohoto problému.
Příznaky režimu kulhání
Kromě náhlého výpadku napájení a výstražných světel může vaše auto vykazovat také řadu dalších příznaků, když přecházíte do režimu Limp:
- Pomocné funkce mohou přestat fungovat -topení, klimatizace
- Maximální otáčky budou omezeny na 2,000 3,000-XNUMX XNUMX ot./min
- V automatu můžete být zablokováni na nižší rychlostní stupeň
- Maximální rychlost bude omezena na 30-50 mph
Způsoby kulhání
Režim Limp se aktivuje, když ECU (elektronická řídicí jednotka) zaznamená, že něco nefunguje v rámci předem definovaných parametrů, může to být způsobeno řadou faktorů, jako jsou:
- Extrémně nízké hladiny oleje nebo chladicí kapaliny
- Chyby převodovky – například když převodovka nemůže správně řadit
- Poruchy brzd – zadřené brzdy nebo netěsnost hydrauliky v systému
- Problémy s kabeláží – problém s kabeláží může způsobit nevyzpytatelné chování
- Problémy s motorem – problémy jako vynechávání zapalování nebo problémy s turbodmychadlem
Co dělat, když vaše auto přejde do nouzového režimu
Důvody, proč váš vůz přešel do režimu Limp, jsou různé, ale mohou být vážné, takže je nejlepší nechat jej co nejdříve zkontrolovat mechanikem.
Varovné signály byste nikdy neměli ignorovat, ale jak brzy se můžete problému věnovat, závisí na tom, jak daleko jste od místa bezpečného zastavení a jak auto jede.
Pokud je to možné, zkontrolujte hladinu oleje a chladicí kapaliny a také jakékoli zjevné známky poškození kabeláže nebo úniku kapalin pod vozem.
Jak dostat své auto z bezvládného režimu
Vůz můžete resetovat vypnutím a opětovným zapnutím po 30 sekundách. Pokud varovná světla zmizí a auto se chová normálně, může to být jen dočasná závada. Předsystémové kontroly však mohou zaznamenat aktivaci režimu kulhání, jakmile se auto znovu zapne, nebo se problém může znovu objevit poté, co nějakou dobu jedete.
Vaše auto by mělo stále jezdit v nouzovém režimu, ale bez ohledu na to možná budete chtít být zotaveni
Pokud přejde rovnou zpět do režimu Limp, pak je nejlepší zarezervovat auto k důkladné kontrole. Můžete s ním zajet do garáže, pokud problém není vážný, nebo nechat auto zachránit. Náklady na opravu chyby se budou lišit od jednoduché práce za reset ECU až po mnoho tisíc liber, pokud je problém vážný a spočívá v motoru nebo převodovce.
Časté dotazy k režimu kulhání
Mohu řídit své auto v nouzovém režimu?
Celá podstata limp mode je v tom, že auto je řiditelné, i když se sníženým výkonem. Pokud to nebo máte pocit, že je něco vážně špatně, pak je nejlepší nechat to opravit mechanikovi. Jízda v režimu Limp po delší dobu může zhoršit vše, co může být s vozem špatně. Také stojí za to zdůraznit, že pokud je váš cíl o něco dál nebo vyžaduje připojení k rychlým silnicím (což by mohlo být nebezpečné při sníženém výkonu), možná budete chtít, aby byl zachráněn.
Jak rychle mohu jet v nouzovém režimu?
To záleží na tom, jaké parametry nastavil výrobce, ve většině případů budete omezeni na maximálně 30 až 50 mph a nebudete moci vytočit auto nad 3,000 ot./min ani zařadit vyšší rychlostní stupeň, pokud se jedná o automat.
Mohu obejít režim limp?
Můžete se pokusit obejít režim Limp restartováním vozidla po krátkém čekání nebo odstraněním jednoho z vývodů baterie, abyste resetovali elektronické systémy. Můžete také zkontrolovat hladiny kapalin a zjistit, zda to není příčinou problému, nebo nechat chybu elektronicky resetovat, abyste zjistili, zda se nejedná pouze o dočasnou závadu.
Kupte si další auto (a prodejte své staré) s carwow
Po nové sadě kol? Pak se podívejte na naše nejnovější nabídky, všechny dodávané našimi důvěryhodnými prodejci.
Pokud uvažujete o prodeji svého starého auta, můžete to udělat také prostřednictvím carwow. Naši důvěryhodní prodejci opět nabídnou vaše vozidlo, takže si můžete vybrat nejlepší cenu, zatímco platbu obdržíte ve stejný den, kdy bude váš starý vůz vyzvednut.
