{"id":3043,"date":"2017-04-18T12:22:45","date_gmt":"2017-04-18T10:22:45","guid":{"rendered":"http:\/\/www.checkstar-techblog.it\/?p=3043"},"modified":"2024-01-12T14:36:41","modified_gmt":"2024-01-12T13:36:41","slug":"failure-pressure-oil-audi","status":"publish","type":"post","link":"https:\/\/www.checkstar-techblog.it\/en\/failure-pressure-oil-audi\/","title":{"rendered":"Fuel pressure failure Audi direct injection FSI"},"content":{"rendered":"

Good morning<\/p>\n

Audi A3 model 8P from 2010 with FSI direct injection engine<\/p>\n

\"\"<\/p>\n

Malfunction: miscellaneous engine light on, engine does not start or starts with reduced power.<\/strong><\/p>\n

Performing a diagnosis we found the following dtc:<\/p>\n

-p310b:low fuel pressure<\/p>\n

-0A4B:Alternator position sensor failure<\/p>\n

-p2540:fuel pressure sensor<\/p>\n

-p0087:rail pressure (pressure too low)<\/p>\n

-p129F:fuel pressure (pressure too high)<\/p>\n

-p129E:fuel pressure (pressure too low)<\/p>\n

The fault lies in the sensor that measures the fuel pressure on the low-pressure side. The sensor is the G410 according to Volkswagen nomenclature.<\/p>\n

CAUTION: the sensor is mounted on the discharge pipe before the high-pressure pump. or, depending on the model, directly on the HP pump.The sensor installed on the rail is G247 and has nothing to do with the defect<\/strong><\/em><\/p>\n

Checking the sensor by means of the parameters in the self-diagnosis alone is not sufficient to certify the fault. It will be necessary to use a pressure gauge and compare the measurements taken with the values read in the self-diagnosis<\/p>\n

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Follow the procedure below:<\/p>\n

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  1. Check with the customer that the vehicle has not run out of fuel. Otherwise, the fault codes may have been stored in that condition.<\/li>\n
  2. Measure the pressure with the self-diagnosis tool by selecting the fuel pressure parameter on the low-pressure side. Be careful when selecting the \"actual value\" parameter. Sometimes it can also be called: \"Set Value\" or \"Actual Value\".<\/li>\n
  3. Then measure the pressure with a pressure gauge by placing it before the high-pressure pump by means of an adapter. Attempt starting and record the measured pressure. The value will depend on the speed reached during start-up. Under normal conditions, the pressure should at least reach that produced by the tank pump (3-5 bar = 300-500 kPa).<\/li>\n
  4. Compare the two (absolute) values. If an absolute pressure gauge is used, take into account that it measures 1 bar more than the value read in the self-test. An absolute manometer is easy to recognise because when placed in free air it already measures atmospheric pressure (1 bar above sea level).<\/li>\n
  5. If the readings are similar (within 1 bar tolerance). The sensor measures the correct value and should not be replaced. It will be necessary to check in order:\n
      \n
    1. Low pressure pump<\/li>\n
    2. Fuel filter<\/li>\n
    3. Discharge pipe<\/li>\n
    4. Presence of leaks<\/li>\n
    5. High pressure pump and flow regulator<\/li>\n<\/ol>\n<\/li>\n
    6. If the measured value is very different from the value read in the self-diagnosis check the pressure sensor wiring and then replace it. The sensor has three connection wires. With a multimeter referring to the ground it is necessary to detect: Power supply (+5V or +12V depending on the vehicle), A ground (AC 0-0.3 Volts), A signal (0.5 Volts at 0 bar). If the sensor is faulty or disconnected, a power supply of approx. 5 Volts is present instead of the signal.<\/li>\n<\/ol>\n

       <\/p>\n

      good work see you soon\u00a0\u00a0 <\/p>\n

      Andrea<\/p>\n<\/div>\n<\/div>\n<\/div>\n

      <\/div>\n<\/div>\n<\/div>\n<\/div>\n
      <\/div>\n
      <\/div>\n

       <\/p>","protected":false},"excerpt":{"rendered":"

      Good morning Audi A3 model 8P 2010 with FSI direct injection engine Malfunction: engine miscellaneous light on, engine does not [...]<\/p>","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[167],"acf":[],"featured_image_urls":{},"appp_media":null,"views":2989,"_links":{"self":[{"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/posts\/3043"}],"collection":[{"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/comments?post=3043"}],"version-history":[{"count":0,"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/posts\/3043\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/media?parent=3043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/categories?post=3043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/tags?post=3043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}