Nissan Frontier Forums: Emission Sensor Problems

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Nissan Frontier Forums : Problems / Technical

Topic: Emission Sensor Problems

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5ring
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Joined: Jan 04 2012
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Posted: Jan 05 2012 at 12:14am \| IP Logged

Hope someone has seen this before! I have 2000 Frontier, V6/5 spd man. I just failed state emissions because ECM lost memory on four sensors (OBD Cat, OBD Evap, Oxy Snsr and Oxy Snsr Heat). If I drive it 100 ml.s and hook up test equip without turning off engine all sensor report as they should, but turn off engine and they are lost. At no point is the 'Check Engine' light on.

Any ideas why the memory is being lost and what I need to do to correct it. This is a GREAT truck. Almost 200K ml.s and never let me down.

Thanks in advance,
5ring

frontierguy
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Joined: May 20 2008
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Posted: Jan 05 2012 at 7:06pm \| IP Logged

There is a fuse for back-up power to the ECU, maybe that is
blown. Check all fuses under the dash and hood. Could be
the ECU is failing also.

__________________

'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.

Nissan Technician 25 + years
2011 John Deere X720SE

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