Question about 2003 Nissan Altima

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Trying to find the reason for code p2000

Did a diagnostic showed 2 codes kwp2000 & iso9141 car when in drive sputters and wants to die.

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The scan tool your using is generic ISO 9141 is used as the protocal. Its not a code. kwp2000 is not shown. Try and use it on manufacture specific or try and get any freeze frame codes and reply or repost. ( Don't forget to turn ignition key to the run position when trying to retrieve codes.)

Posted on Jun 05, 2015


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What do these codes mean on a diagnostics check? c, ev, o, oh,e? what are these numbers for ISO9141 KWP2000 and why does it steady blink on monitor then say backfire problems?

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P2000 code and ISO9141

This is a fault relating to an emission's control device called a Nitrous Oxide Trap. As on petrol engines there is a catalytic convertor, clean burning diesel engines need to remove the nitrogen gas from the exhaust gasses. Like any filter (even catalytic convertors), they can only absorb so much before they are full and need to be replaced. NOx Trap is relatively new technology.

ISO9141 is not a fault code- it refers to the communication system that your vehicle uses to relay info to and from its different computer boxes. Also a relatively new system, it is a CAN communications network that can transfer info and receive simultaneously, hence speeding up response times. This technology is critical in safety specific items such as ABS braking and Airbags as the faster you can get the unit to respond, the more efficient the system is.

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Trouble code 9141

ElmScan ISO is a PC-based scan tool, and our most popular OBD-II interface. It supports the ISO9141-2 and ISO14230-4 protocols used mostly in Chrysler Corporation, European, and Asian vehicles. Be sure to determine the communication protocol used in your vehicle before purchasing this scan tool.
Processor: ELM323, crystal-controlled for accuracy
OBD-II Protocol: ISO 9141-2 and ISO 14230-4 (KWP2000)
Output protocol: RS232
Indicator LED's: OBD Tx/Rx, RS232 Tx/Rx, Power
Operating voltage: 12V, internal protection from short circuits/overvoltages
Dimensions: 3"x4" (76x102 mm)

The interface can be used in conjunction with our free software to turn your laptop or desktop computer into a fairly sophisticated auto diagnostic system. The program has a built-in database of more than 3000 trouble codes, and allows you to read and erase stored trouble codes and oxygen test results, turn off the MIL ("Check Engine" light), and display real-time sensor data. For more information about the program, please visit our Software page.

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I have used obd11 and its give me 2 codes kwp2000 & iso9141 how do i find out wa they are

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