#injectors
10 posts in Car Diagnostics blog about "injectors" — OBD-II diagnostics, DTC codes, repair. ← All posts
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Mercedes OM651: injectors, timing chain and the delete myth
The four-cylinder diesel in half the Mercedes range for a decade. Two documented issues dominate, and one of them is measurable before it becomes a symptom.
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Renault 1.5 dCi: the engine in half of Europe, and its four weak points
One of the most produced diesel engines ever made, in Renaults, Nissans, Dacias and Mercedes. Four items account for most of what goes wrong.
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Ticking at idle: injectors, lifters or an exhaust leak
Some ticking is entirely normal and some means an engine is running out of oil pressure. The difference is in how the noise responds to temperature and revs.
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Bad fuel and misfuelling: what to do and what not to do
Filled up with the wrong fuel? The rule is do not start it. The symptoms of bad fuel, the difference between petrol in a diesel and the reverse, and what diagnostics shows.
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Fuel additives: which ones work and which ones sell hope
The additive shelf promises everything: clean injectors, raise octane, revive the catalyst. A breakdown by category — what has a physical mechanism, what works narrowly, and what cannot work at all.
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P0172 and P0175: rich mixture — why it smells of fuel and where the fuel goes
The mirror image of P0171: too much fuel, and the module cannot remove enough of it. The causes, why the catalyst suffers, and how a rich mixture kills an engine through its oil.
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P0201–P0206: injector circuit — when the wire is at fault, not the injector
These codes name a specific cylinder, which is why they get read as "the injector died". In fact the module is complaining about an electrical circuit, and the injector is only one of three elements in it.
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Diesel Common Rail Injector Diagnostics via OBD-II — Without Removal
How to diagnose diesel Common Rail injectors through OBD-II: Live Data Balance Rate, Return Flow, P020X codes, IQA correction on Bosch, Delphi, Siemens systems — VW, BMW, Ford, Peugeot.
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Diesel injector coding: correction values, EDC17, and when an injector needs a new code
What IMA/injector correction code is, how EDC17 ECU learns each injector, codes P0263-P0272, what OBD-II reads, and why "just replace the injector" on diesel doesn't work.
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Fuel Consumption Went Up: 12 Causes and How to Diagnose via OBD-II
Sudden fuel-use increase: which DTC codes and live parameters to watch, how to distinguish worn engine from a clogged filter.