Question about 2004 Nissan Sentra

1 Answer

What exactly is P1138 because I haven't been able to locate it in any OBD2 code books and what is the cause

Posted by on


1 Answer

Of coarse you haven't
You only find the Generic OBD Codes, required by the Govt
The dealers took your tax dollars, and now want your vehicle back, so they can take more money
The P Codes and others, are Manufacturer Specific

P1138 --Lack of HO2S Switch,Indicates Lean

Without writing a book on that issue, You may have a bad Oxy Sensor
It is a rather unusual code,so I would have it checked out by a local repair shop.

Posted on Nov 07, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Have a code P1138 on 2003 Toyota Tundra - how do I fix ?

Swirl Control Valve Control System Performance Repair Importance Level: 3/3 Repair Difficulty Level: 2/3 Possible causes - Faulty Swirl Control Valve Control Position Sensor - Swirl Control Valve Control Position Sensor harness is open or shorted - Swirl Control Valve Control Position Sensor circuit poor electrical connection - Faulty Swirl Control Valve What does this mean? Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light) P1138 Description While idling and during low engine coolant temperature, the swirl control valve closes, Thus the velocity of the air in the intake passage increases, promoting the vaporization of the fuel and producing a swirl in the combustion chamber. Because of this operation, this system tends to increase the burning speed of the gas mixture, improve fuel consumption, and increase the stability in running conditions. Also, except when idling and during low engine coolant temperature, this system opens the swirl control valve. In this condition, this system tends to increase power by improving intake efficiency via reduction of intake flow resistance, intake flow. The swirl control valve is operated by the Engine Control Module (ECM).

Read more:

Oct 02, 2016 | 2003 Toyota Tundra

1 Answer



HO2S-12 Sensor Code

That is an oxygen sensor code for the front
left side sensor not switching properly

I can assure you that is NOT the main problem
for lack of power

Owning a 2004 L/S & having 10 years diagnostic experience
with it, I would guess you need new spark plugs & most if not
all of the cop ignition coils replaced, as well as the front oxygen

I have seen a bad battery cause that as well, from low module voltage.

Five or six bad coils with or without a bad battery, I have seen the car only able to go 15 miles per hour,just short of etc failsafe

Mar 18, 2014 | Lincoln LS Cars & Trucks

1 Answer

I have injector pulse.switched coils .still miss fire on 2/4/6/ converter is cherry red.

If the catalytic converter is cherry red there are only a few things that will cause this, extreme over-fueling causing excess unburned fuel to enter the exhaust and overheat the catalytic converter. You will need which cylinder(s) is misfiring, you can ID the problem cylinder by checking the diagnostic OBD2 fault codes, you will have a P03XX in memory, with the XX's being the cylinder number that is misfiring. The possibilities are this, you have an injector that is stuck open or a low cylinder compression issue or a very lean condition that keeps the fuel from burning like a big vacuum leak. Also address any other fault codes found in the OBD2 fault code testing. DO NOT CONTINUE TO RUN THE ENGINE TO THE POINT THE CATAYLUTIC CONVERTER TURNS CHERRY RED! YOU WILL RUIN A VERY EXPENSIVE PART IF YOY HAVEN'T ALREADY

Dec 12, 2011 | 2001 Oldsmobile Aurora

1 Answer

Car Won't Start - Engine No Completely Start. It is starts but stops immediately.

Hi there,

You haven't provided much information on Year or Engine model.

This condition could be caused by many things, ranging from fuel, air leak to sensor issues.

If your vehicle is 1996 (or newer), your vehicle's onboard diagnostic (OBD2) computer will have stored the fault codes relating to this condition.

Have an approved service agent check for codes (this only takes 15mins) which will quickly identify the suspected circuit/component.

The above process will save you unecessary expense.


Aug 28, 2011 | Mazda MPV Cars & Trucks

1 Answer

What is error code code p1138 for Nissan Sentra?

What exactly did they do to make the repair?I can not find that code at all in my code list.

Jan 26, 2010 | 2004 Nissan Sentra

1 Answer

Where is the OBD2 connector located? 2002 F150

under the steering colum near fuse box, brake pedal, gas pedal area. and if you don't know where to hook it up at, odds are you don't know how to fix the problem with your $100 scan tool. Put your nose in some books and learn before you try. That or find someone who will walk you through it.

Jan 13, 2010 | 2002 Ford F150 Regular Cab

1 Answer


A vehicle speed sensor bad MAY cause that code. Its located near where the right axle comes out of the transmission.

Dec 14, 2009 | 2002 Cadillac Deville

1 Answer

Trouble code P0236

well idk if you kno the code already or not but my obd2 reader book says is a generic po code and that it is Turbocharger boost sensor a circuit malfunction....not sure wut that means exactly tho, sorry

Dec 11, 2008 | 1997 GMC Sierra

1 Answer

Code reader

The code P1408 is no egr flow sensed, It may be that this code is tied to the O2 code P1138, check the egr flow by manully pulling the vlave open with your fingers, the engine will run really bad or stall, if it does'nt the egr passages are plugged with carbon and will need to be cleared, locate the underhood emissions ticker, it will show the location of the EGR valve. Repair the EGR fault first, disconnect the battery for 5 minutes minumiun and then drive it for a few days to see if codes return.

Jul 24, 2008 | 1998 Ford Windstar

Not finding what you are looking for?
2004 Nissan Sentra Logo

Related Topics:

300 people viewed this question

Ask a Question

Usually answered in minutes!

Top Nissan Experts


Level 3 Expert

83810 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22413 Answers

gerry bissi

Level 3 Expert

4387 Answers

Are you a Nissan Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides