P1270 Diagnostic Trouble Code Discussion for June 2017
Engine RPM / Vehicle Speed Limit Reached
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| Help Request | Posted | |
| 2000 BMW 750iL 5.4L Misfire VIN: WBAGJ0345Y P1270: rationality check mass air flow. ... running on passenger side bank. drivers side bank slave bank has no injector pulse or spark. no rpm signal in scan tool multiple scan tools used. no vehicle speed in slave ecm. mass air flow voltage does change with rpm but grams per second doesn't not cha... |
June 28, 2017 |
