Question about 2004 Nissan Sentra 1.8

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This is the reading I get when I plug in diagnostic tool. What does this mean?

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

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Posted on Jan 02, 2017

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SOURCE: what does engine fault code po171 system too lean bank 1 mean thanks

i think its the oxygen sensor (pre cat) in exhaust

Posted on Sep 23, 2008

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SOURCE: 2005 Nissan Altima service engine

one thing you can bet the house on ....if a nissan sets a cat converter needs a cat me on the last 10 yrs. as nissan master tech i have seen no other cause!

Posted on Mar 18, 2011

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2006grandcherokee, u0401,code came up on a diagnostic tool at orileys. What does it mean and what can I do. Ty

I wonder if o rileys dignostic tool can read jeep fault codes

pop into a jeep service division for a code read

o rileys code suggests ECU or ecu powertrain module
cant communicate with diagnostic tool

U0401 OBD II Trouble Code Jeep


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1 Answer

Engine mangement light stays on

When the CEL light is turned on by the on board computer system it means a fault has occurred in the system it monitors and or controls. You must have the fault code read with a special tool called a scanner to see what fault has occurred and then do the diagnostics to repair it.

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What does code po745 mean on a 2004 lincoln ls v8

Here are some code definitions: I am also including a link to a forum discussion of the problem. The forums can be very helpful.
P0745 Pressure Control Solenoid Malfunction

P0745 OBD II Trouble Code

2000 LS transmission P0745

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2003 sentra spec v no spark fuel pump not priming fuel relay clicking

There are many posible things. but the most common failure when you don't have link. you must repair or change the computer ( ecu, ecm,pcm ).
if you change it you may have to reprogram it with your car serial number.

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What does a lightning bolt on dash mean on a 2006 vw beatle?

It means there is a "Diagnostic Trouble Code" Stored in your On Board Diagnostic System.

Your On Board Diagnostic (OBD) System is a computer that monitors the sensors and readings of your vehicle.

So the light means "Something weird is going on.". If you want to know what that is, you'll need to have the vehicle scanned using an OBD scanner. There are tools for sale to the public, and every dealership has these. AutoZone also has a scanner they can use to help you identify what part to buy to fix the problem.

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1 Answer

How do you read codes on a 91 dodge ram charger there is no ob2 plug in?

Data Link Connector

The data link connector is a dedicated diagnostic scan tool connector. It is located in the engine compartment against the fire wall. It links the engine controller to the Diagnostic Readout Box (DRBII) scan tool or the Mopar Diagnostic System (MDS), or any other Chrysler-compatible diagnostic scan tool.
Here's a link to the codes.Tyler,join the at top right corner,it's free,then you can use there repair guides like me.

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1 Answer

Car cranks but doesn't start changed fuel pump, changed fuel filter, no security system. fuel injectors and pump work and have new plugs

The engine and transmission in this cars drivetrain is fully electronically controlled by a computer called the PCM (Powertrain Control Module). Whenever a problem like this occurs the computer stores a record of the problem in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s)

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1 Answer

How to get rid off check engine light in 04 Suzuki Forenza

A check engine light means there is a mechanical failure with the vehicle, and should not be ignored. Most part stores will read check engine light codes for you for free, and tell you what they mean. The only way to turn this code off is with a diagnostic tool they use. If you have already fixed the problem find a local parts store in your area that offers free check engine light diagnostics and ask them to read the does and turn the light off for you.

May 10, 2012 | Suzuki Forenza Cars & Trucks

1 Answer

Engine code P2096 for a 2005 Dodge Noen 2.0litre

P2096 is Post Catalyst Fuel Trim System To Lean Bank 1.
In most cases this code refers to a bad O2 sensor in the exhaust. Due to year etc, senor replacement. here is the technical info for the code. Indicating O2 sensor 1/2 meaning bank 1, sensor 2 plus shows other posssibles

If the PCM multiplies short term compensation by long term adaptive as well as a purge fuel multiplier and the result is below a certain value for 30 seconds over two trips, a freeze frame is stored, the MIL illuminates and a trouble code is stored. Two Trip Fault. Three good trips to turn off the MIL.

Exhaust leak
Engine mechanical
1/2 O2 Sensor
(K141) O2 Sensor 1/2 signal circuit
(K299) O2 1/2 Heater control circuit
(K904) O2 Return downstream circuit
Fuel contamination

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See: Initial Inspection and Diagnostic Overview\Initial Inspection


- Check the vehicle repair history. If the 1/2 O2 Sensor has been replaced make sure that the O2 sensor was properly installed and meets OEM specification.
- Check for contaminants that may have damaged the O2 Sensor: contaminated fuel, unapproved silicone, oil and coolant.

Ignition on, engine not running.
With a scan tool, read DTCs.

Q: Is the DTC active at this time?

YES: Go To 2
NO: Refer to the INTERMITTENT CONDITION Diagnostic Procedure. See: Component Tests and General Diagnostics Perform the POWERTRAIN VERIFICATION TEST. See: Verification Tests\Powertrain Verification Test

Turn the ignition off.


Visually and Physically inspect the exhaust system for holes, cracks, and blockage in the exhaust system.

Q: Is the exhaust system is good condition?

YES: Go To 3
NO: Repair or Replace as necessary. Perform the POWERTRAIN VERIFICATION TEST. See: Verification Tests\Powertrain Verification Test

Check for any of the following conditions/mechanical problems.
AIR INDUCTION SYSTEM - must be free from leaks
ENGINE VACUUM - must be at least 13 inches in neutral
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions or leak
ENGINE PCV SYSTEM - must flow freely
TORQUE CONVERTER STALL SPEED - must be within specifications
POWER BRAKE BOOSTER - no internal vacuum leaks
FUEL - must be free of contamination
FUEL INJECTOR - plugged or restricted injector; control wire not connected to correct injector

Left side exhaust, 2nd O2 sensor back just after cat converter


- Raise and support vehicle.
- Disconnect wire connector from O2S sensor.

CAUTION: When disconnecting sensor electrical connector, do not pull directly on wire going into sensor.

- Remove O2S sensor with an oxygen sensor removal and installation tool.
- Clean threads in exhaust pipe using appropriate tap.

Threads of new oxygen sensors are factory coated with anti-seize compound to aid in removal. DO NOT add any additional anti-seize compound to threads of a new oxygen sensor.

Install O2S sensor. Tighten to 30 N-m (22 ft. lbs.) torque .
Connect O2S sensor wire connector.
Lower vehicle.

Hope this helps and just keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa.

Nov 01, 2011 | 2005 Dodge Neon

1 Answer

Check engine light for volvo 850 wont go off wat else can be the problem if i got a full tune up and put in new spark plugs plus it trembles alot and it shakes when i start it up plus wen i put it on...

Hi, I recommend you access the OBD panel to extract the trouble codes. Then send us the trouble codes for further advice. On 850 models the DLC is located in the engine compartment in front of the module box, behind the passenger side headlamp.

  1. Open diagnostic socket cover and install selector cable into socket No. 2 for fuel injection codes or socket No. 6 (except Motronic systems) for ignition codes.
  2. Turn the ignition switch to the ON position.
  3. Enter control system 1 by pressing the button once. Hold the button for at least 1 second, but not more than 3.
  4. Watch the diode light and count the number of flashes in the 3 flash series indicating a fault code. The flash series are separated by 3 second intervals. Note fault codes.

1f there are no fault codes in the diagnostic unit, the diode will flash 1-1-1 and the fuel system is operating correctly.
  1. If diode light does not flash when button is pressed, or no code is flashed there is a problem with the soft-diagnostic system, proceed as follows:
    1. Check ground connections on the intake manifold, and the ground connection for the Lambda-sond at the right front mudguard.
    2. Check the fuses for the pump relay and the primary pump. On 240 models, fuses are located inside the engine compartment on the left side wheel well housing. On 760/780 models, fuses are located in the center console, just below the radio. On 740/940 models, fuses are located behind the ashtray. Access can be gained by removing the ashtray, and pressing upward on the tab marked electrical fuses press. On 850 models, the fuses are located on the left side of the engine compartment behind the strut mount plate. The fuses on 960 models are located on the far left side of the dashboard. The driver's door must be open to gain access to the fuses.
    3. Remove glove compartment, and check control unit ground connections.
    4. Turn the ignition switch to the OFF position. Remove control unit connector and connector protective sleeve.
    5. Check diagnostic socket by connecting a voltmeter between ground and No. 4 connection on the control unit connector. Reading should be 12 volts. If no voltage is present, check lead between control unit connector and fuse No. 1 in the fuse/relay box.
    6. Turn the ignition to the ON position, and install selector cable into the No. 2 socket on the diagnostic socket. Connect a voltmeter between ground and No. 12 connection on the control unit connector. Reading should be 12 volts. Press the button on diagnostic socket and note reading. Reading on the voltmeter should be 0 volts. If no voltage at the control unit is present, take reading at the diagnostic socket connector. If reading remains at 12 volts when button is pressed, check diagnostic socket.
    7. Connect a voltmeter between ground and the red/black lead on the diagnostic socket connector. Reading should be 12 volts.
    8. Connect a suitable ohmmeter between ground and the brown/black lead in the diagnostic socket connector. Reading should be 0 ohms.
    9. Turn the ignition to the OFF position. Connect ohmmeter between diagnostic socket selector cable and the pin under selector button. The ohmmeter should read infinity. Press the button and note the reading. The reading should be 0 ohms.
    10. Connect a suitable diode/multimeter tester, or equivalent, between the diagnostic socket diode light and the selector cable. Connect red test pin from the tester to pin under diode light and black test pin from tester to selector cable. A reading on the tester indicates correct diode light function. With no reading on tester, replace diagnostic socket.
    11. Check the system relay/primary relay by connecting a voltmeter between ground and the No. 9 connection on the control unit connector, then connect a jumper wire between ground and No. 21 connection on the control unit connector. The relay should activate and the reading should be 12 volts.

  2. Press the diagnostic socket button. Note any additional fault codes.

The diagnostic system memory is full when it contains 3 fault codes. Until those codes are corrected and the memory erased, the system cannot give information on any other problems.
  1. Press the diagnostic socket button for the third time to see if a third fault code is stored in the memory. If the diode light flashes the same code 1-1-1, there are no other codes in the memory.


Fig. Fig. 1: Push button once for mode 1
Push button twice for mode 2

Push button three times for mode 3


To clear the codes:

  1. Turn the ignition switch to the ON position.
  2. Read fault codes.
  3. Press diagnostic socket button 1 time and hold for approximately 5 seconds. Release button. After 3 seconds the diode light should light up. While the light is still lit, press the button again and hold for approximately 5 seconds. After releasing the button, the diode light should go off.
  4. To ensure that the memory is erased, press the button 1 time, for 1 second but not more than 3 seconds. The diode light should flash code 1-1-1.
  5. Start and run engine. If engine will not start, correct the problem before proceeding and start over with Step 1.
  6. Check to see if new fault codes have been stored in the memory by pressing the diagnostic socket button 1 time, for 1 second but not more than 3 seconds.
  7. If fault code 1-1-1 flashes, it indicates that there are no additional fault codes stored in its memory.

Oct 05, 2011 | 1994 Volvo 850

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