ECU code ???? WTF
ECU code ???? WTF
Guys,
Took the car to me mechanic last Wednesday cause she had been running rich and having the same issue that Bijan was having except no backfire or 4 ft flames. Anyways got her back yesterday (he had to replace the CEL bulb cause it was out and then troubleshoot the rich running) and he told me that she was throwing a code 41. I'm like WTF is code 41. Searched through the stickies and of course no code 41. Anyone ever had a ghost code or something similar happen like this? If so chime in cause the CEL is still on. I suspect it could be the Air Temp Sensor but would like input before doing more research.
Took the car to me mechanic last Wednesday cause she had been running rich and having the same issue that Bijan was having except no backfire or 4 ft flames. Anyways got her back yesterday (he had to replace the CEL bulb cause it was out and then troubleshoot the rich running) and he told me that she was throwing a code 41. I'm like WTF is code 41. Searched through the stickies and of course no code 41. Anyone ever had a ghost code or something similar happen like this? If so chime in cause the CEL is still on. I suspect it could be the Air Temp Sensor but would like input before doing more research.
He read the code with a scaner correct? Or did he use the screw method? I'd just go to your local auto store and have them pull codes with a scaner, they will print out the result with the code number and description of the malfunction.
0401 - Intake Air Temp Sensor
Diagnostic Trouble Code 0401 points to a problem with the Intake Air Temperature Sensor. The IATS is mounted in the engine air intake duct, downstream of the air cleaner filter. It detects intake air temperature and transmits a signal to the Engine Control Module. The sensor uses a thermistor, a resistor with a value which is inversely proportional to temperature. The IATS is not directly used to control the engine. It is used only for diagnostic purposes. Therefore the engine should start and run normally, even with the Malfunction Indicator Light on and DTC 0401 stored.
This malfunction is detected when ...
a) An excessively low or high voltage from the sensor is detected by the ECM.
b) The signal from the IATS is inconsistent with the signal received from the Engine Coolant Temperature Sensor.
Possible causes include ...
- Harness or connectors (The sensor circuit is open or shorted.)
- a faulty Intake Air Temperature Sensor
The IATS resistance values should be ...
- at 14 degrees F, 7.0-11.4 Kohms
- at 68 degrees F, 2.1-2.9 Kohms
- at 176 degrees F, 0.27-0.38 Kohms
For further information about the Intake Air Temperature Sensor please refer to the Chilton repair manual (page 4-16) or the Haynes repair manual (page 6-11).
Diagnostic Trouble Code 0401 points to a problem with the Intake Air Temperature Sensor. The IATS is mounted in the engine air intake duct, downstream of the air cleaner filter. It detects intake air temperature and transmits a signal to the Engine Control Module. The sensor uses a thermistor, a resistor with a value which is inversely proportional to temperature. The IATS is not directly used to control the engine. It is used only for diagnostic purposes. Therefore the engine should start and run normally, even with the Malfunction Indicator Light on and DTC 0401 stored.
This malfunction is detected when ...
a) An excessively low or high voltage from the sensor is detected by the ECM.
b) The signal from the IATS is inconsistent with the signal received from the Engine Coolant Temperature Sensor.
Possible causes include ...
- Harness or connectors (The sensor circuit is open or shorted.)
- a faulty Intake Air Temperature Sensor
The IATS resistance values should be ...
- at 14 degrees F, 7.0-11.4 Kohms
- at 68 degrees F, 2.1-2.9 Kohms
- at 176 degrees F, 0.27-0.38 Kohms
For further information about the Intake Air Temperature Sensor please refer to the Chilton repair manual (page 4-16) or the Haynes repair manual (page 6-11).
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Kyle Lee Cleveland
6th Generation Maxima (2004-2008)
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Sep 28, 2015 09:01 PM