I've got a 99 Infiniti i30, 72k miles. About a month ago it threw a cel for the emissions purge valve. There were no issues with startup or how the car ran, so I didn't change anything and the code disappeared after a week. Fast forward three weeks, another cel popped up. This time for crankshaft position sensor, idle air controller, and again the emissions purge valve.
I don't want to start throwing cash at a handful of $100 sensors to see what sticks. Could there be any other underlying issue that would link all of these together?
Edit: forgot to add that there is no issues with how the car starts, runs, or drives.
Check engine light help
Re: Check engine light help
If it helps, the exact codes are P0443, P0505, and P0335.
This is my first Nissan, so I'm not entirely familiar with the systems yet. On my last Jeep, a broken wire in the temp sensor at the thermostat housing caused a trip in the electrical system that controls the oxygen sensors and cps. A $5 temp sensor caused CEL's for all of those. Just curious if Nissan has similar issues, where an unrelated part could cause false errors across all of those systems. Or do I just have bad luck and all three items are really failing at the same time?
This is my first Nissan, so I'm not entirely familiar with the systems yet. On my last Jeep, a broken wire in the temp sensor at the thermostat housing caused a trip in the electrical system that controls the oxygen sensors and cps. A $5 temp sensor caused CEL's for all of those. Just curious if Nissan has similar issues, where an unrelated part could cause false errors across all of those systems. Or do I just have bad luck and all three items are really failing at the same time?
Re: Check engine light help
Welcome to NICO.
Here is the section of the FSM that will show you the components and diagnostics for the codes. http://www.nicoclub.com/FSM/I30/1999/ec.pdf
The IACV is a common issue with the 4th gens. Inspect the wiring connectors. You can take it off and clean the carbon from the inside, apply some dielectric grease to the electrical connectors to see if that helps, but if it is throwing a code you may need to go ahead and replace it. Some people have had issues with a bad IACV shorting back to the ECU.
For the crank sensor, pull the sensor and clean any debris off the sensor and inspect the wiring.
The purge valve would be the lowest priority. It's probably just the valve sticking.
Here is the section of the FSM that will show you the components and diagnostics for the codes. http://www.nicoclub.com/FSM/I30/1999/ec.pdf
The IACV is a common issue with the 4th gens. Inspect the wiring connectors. You can take it off and clean the carbon from the inside, apply some dielectric grease to the electrical connectors to see if that helps, but if it is throwing a code you may need to go ahead and replace it. Some people have had issues with a bad IACV shorting back to the ECU.
For the crank sensor, pull the sensor and clean any debris off the sensor and inspect the wiring.
The purge valve would be the lowest priority. It's probably just the valve sticking.
Re: Check engine light help
Thank you so much for the info!! I ran the ecu diagnostic and it came back with no fault. The CEL cleared, and has not come back. I'm assuming its a fluke for now, as there is no issues in any way with the way the car starts or runs.