2003 Nissan Sentra 2.5 LE Engine QR25DE

Asked by Oct 07, 2014 at 04:54 PM about the 2003 Nissan Sentra 2.5 LE

Question type: Maintenance & Repair

Can you test ECM when car is not running?  How do you disconnect ECM from wire harness?

5 Answers

62,345

Yes it can be checked,not running,and why would you want to take it out,unless you are replacing it?

If we need to replace it, we want to do it ourselves, not pay a garage. How do you test it?

62,345

It will need scanning,

1,415

You will need to go to the shop anyway, unless you know what you're doing. Maybe we can help you here if we know what problem you're trying to solve.

1 out of 1 people think this is helpful.

About a month ago the service engine light came on for a couple of days and then went off. We put it on the hand held coder and it read # 4 cylinder. we replaced the spark plug and it went off again for a couple of days. Then back on again. We changed the coil pack and it went off again and then back on. Still reading #4 cylinder on coder. then we seen antifreeze in the oil so stopped driving it and started to tare it down to replace head gasket. When we had it all back together it wouldn't start. we have put on a new cam and crack sensor. We have check the wire harness. The 3 wires running from the ECM to the coil packs. they are not broken. Got one new coil to see if there would be any spark there but there was no spark. When you try to start it the 1st and 2nd time, it will spark a little bit on 2 and 4 cylinder and after that nothing. so we thought the next step would be the ECM.

Your Answer

Add photo

Related Questions

Sentra

Looking for a Used Sentra in your area?

CarGurus has 54,028 nationwide Sentra listings starting at $2,000.

ZIP:

Search Nissan Sentra Questions

Nissan Sentra Experts

#1 L_R
L_R
Reputation 1,250
#2 Doran Harney
Doran Harney
Reputation 1,200
#3 Tom Demyan
Tom Demyan
Reputation 970
View All

Related Models For Sale

Used Nissan Altima
796 Great Deals out of 77,605 listings starting at $2,700
Used Toyota Corolla
758 Great Deals out of 74,633 listings starting at $1,991
Used Honda Civic
482 Great Deals out of 81,846 listings starting at $558
Used Honda Accord
696 Great Deals out of 83,201 listings starting at $500
Used Toyota Camry
857 Great Deals out of 90,788 listings starting at $1,200
Used Nissan Maxima
278 Great Deals out of 26,070 listings starting at $2,300
Used Hyundai Elantra
485 Great Deals out of 51,391 listings starting at $1,699
Used Ford Focus
533 Great Deals out of 55,276 listings starting at $1,495
Used Mazda MAZDA3
201 Great Deals out of 29,468 listings starting at $1,000
Used Hyundai Sonata
540 Great Deals out of 50,016 listings starting at $1,300
Used Volkswagen Jetta
333 Great Deals out of 33,914 listings starting at $700
Used Chevrolet Malibu
774 Great Deals out of 87,805 listings starting at $1,900

Used Cars For Sale

2017 Nissan Sentra For Sale
3 Great Deals out of 34,837 listings starting at $10,805
2016 Nissan Sentra For Sale
42 Great Deals out of 3,965 listings starting at $8,900
2015 Nissan Sentra For Sale
179 Great Deals out of 4,776 listings starting at $7,499
2014 Nissan Sentra For Sale
95 Great Deals out of 3,454 listings starting at $6,755
2013 Nissan Sentra For Sale
86 Great Deals out of 2,455 listings starting at $5,555