Question about 2004 Nissan Sentra
CODE P1278- HEATED OXYGEN SENSOR 1 SLOW RESPONSE.POSSIBLE CAUSE EXHAUST LEAK AT EXHAUST MANIFOLD OR PIPES.FAULTY PRESSURE REGULATOR LEAKING OR FUEL INJECTORS LEAKING.AND FAULTY TPS SENSOR.
Posted on Jul 08, 2010
Posted on Jul 08, 2010
The P1278 is air fuel ratio out of range error.
Most likely cause are air leak into the intake manifold.
Exhaust gas leaks
dirty PCV (cheap fix / check hoses and plastic parts around PCV valve)
Mass air flow sensor (MAP)
Did you get a letter from Nissan for the Sentra recall on 2006?
JUL 07, 2006 | Recall ID# 81936
Recall Reason ENGINE AND ENGINE COOLING Recall Date JUL 07, 2006 Model Affected SENTRA Potential Units Affected 294166
Recall Summary ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH A 2.5L ENGINE, THE CRANK ANGLE SENSOR IS AFFECTED BY TEMPERATURE VARIATIONS. UNDER CERTAIN DRIVING CONDITIONS, THESE VARIATIONS IN TEMPERATURE CAN BE LARGE ENOUGH TO CAUSE A BRIEF INTERRUPTION IN THE SIGNAL OUTPUT FROM THE SENSOR.
Consequence IF THE INTERRUPTION IN THE SIGNAL FROM THE SENSOR IS SO BRIEF THAT THE ELECTRONIC CONTROL MODULE (ECM) LOGIC DOES NOT HAVE TIME TO DIAGNOSE THE CONDITION, THE ENGINE MAY STOP RUNNING WITHOUT WARNING WHILE THE VEHICLE IS DRIVEN AT A LOW SPEED INCREASING THE RISK OF A CRASH.
Remedy DEALERS WILL REPROGRAM THE ECM FREE OF CHARGE. THE RECALL BEGAN ON AUGUST 21, 2006. OWNERS MAY CONTACT NISSAN AT 1-800-647-7261.
Notes NISSAN NORTH AMERICA, INC. R0606
Posted on Jul 08, 2010
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Posted on Jan 02, 2017
SOURCE: I checked the "service engine
its just not cause of MAF, mass air flow. its says that your burning of fuel is not proper. The symptoms might be Air fuel ratio(A/F) sensor is malfunction, fuel pressure, injector problem, and also MAF.check all the circuits and sensors and also service your injector.
Posted on Feb 18, 2011
SOURCE: What causes the P1278 code
CODE P1278- HEATED OXYGEN SENSOR 1 SLOW RESPONSE.POSSIBLE CAUSE EXHAUST LEAK AT EXHAUST MANIFOLD OR PIPES.FAULTY PRESSURE REGULATOR LEAKING OR FUEL INJECTORS LEAKING.AND FAULTY TPS SENSOR
Posted on Jan 23, 2011
Tips for a great answer:
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engine light comes on and off, these are indication that there is some
error code stored in your vehicles ECM. The engine module computer
needs to be scanned. These will give the code and as per the error code the
further problem can be detected and confirmed. The engine light
indicator blinks or remains steady on dash when engine computer
noticed any problem with any engine electrically operated components.
more help, I suggest you to refer the help links provided below. These will let
you know more about which areas to look, check, when there is engine light
coming up on dash panel.
the link below: -------
details will help.
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