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Check Engine Light
The check engine light comes on in a car when the engine is experiencing a problem. Ask questions here about your car's check engine light.
7,238 Questions
Where is the secondary air injection system located on a 1999 Chevy Malibu?
You have to jack up the front end, and take off the front two tires. Check the tread wear. If its good your good to go!
Maybe the paperclip trick won't work because your vehicle is a LATE 95. Many of the late 95 vehicles were OBD II.
If it's OBD II you may need to borrow, rent or buy a code scanner from your local auto parts retailer.
Attached is a link for more information about OBD II.
Why might a 1998 Suburban have a random cylinder misfire?
Have you tried a new spark plug? Having same problem. It could be one of many things. Plugs, plug wires, distributor cap, rotor, or coil pack. It could also be but rarely, the EGR valve, or a plugged catalytic converter. If you smell rotten eggs in the exhaust, I would change the catalytic converter. Had the same problem it was because of an injector leaking into the manifold.
How do you reset the check engine light on a 98 Ford Contour?
Easiest way is to disconnect the negative battery cable for a couple minutes then reconnect. This will clear the error codes from the computer. If everything is okay, the CHECK ENGINE light will stay off.
How do you read the check engine codes on 2000 Dodge Stratus?
You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00 Or, go to a Public Library.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
CHECK ENGINE LIGHT RESET/DIAGNOSTIC PROCEDURE
In car ECM Diagnostics/ECM Reset procedure:
1) Sit in the driver's seat.
2) Turn the ignition key to the ON position and wait three seconds. (Do not start the car.)
3) Fully depress and release the accelerator pedal five times in less than five seconds.
4) Wait exactly seven seconds. Fully depress the accelerator pedal for ten seconds until the MIL light flashes.
5) Release the accelerator pedal and start counting flashes to obtain the four-digit trouble code.
Long flashes (0.6 seconds) indicate the first digit of the code; count the blinks one through nine and write down the first digit. (Ten blinks indicates a zero.)
The next three digits follow in turn in the same fashion except with faster blinks (0.3 second) and a 1.0-second pause between digits.
The ECM code repeats itself until you turn the ignition key to the OFF position, at which point the ECM resets itself to standard get-in-and-drive-the-car mode.
You can look up the trouble codes in the ESM/FSM; there's a bunch of them. In the ESM, refer to page EC-639.
Additionally, if you get four blinks of ten (0000), the ECM is indicating no malfunction.
Clearing
You can clear the code (and the annoying MIL) by holding down the accelerator pedal for more than 10 seconds while in Diagnostic Test Mode II. When you release the pedal, the ECM erases the trouble code(s).
Check engine Codes
REASON...................................CODE
A/T 1ST GR FNCTN....................................0731
A/T 2ND GR FNCTN...................................0732
A/T 3RD GR FNCTN...................................0733
A/T 4TH GR FNCTN...................................0734
A/T TCC S/V FNCTN..................................0744
APP SEN 1/CIRC +5.................................0227
APP SEN 1/CIRC +5.................................0228
APP SEN 2/CIRC +5.................................1227
APP SENSOR +5.......................................1228
ASCD BRAKE SW......................................1572
ASCD SW. ................................................1564
ASCD VHL SPD SEN..................................1574
ATF TEMP SEN/CIRC.................................0710
BRAKE SW/CIRCUT...................................1805
CAN COMM CIRCUIT ................................1000
CAN COMM CIRCUIT.................................1001
CKP SEN/CIRCUIT.....................................0335
CLOSED LOOP-B1....................................1148
CMP SEN/CIRC-B1....................................0340
CTP LEARNING.........................................1225
CTP LEARNING.........................................1226
CYL 1 MISFIRE.........................................0301
CYL 2 MISFIRE.........................................0302
CYL 3 MISFIRE.........................................0303
CYL 4 MISFIRE.........................................0304
ECM.........................................................0605
ECM BACK UP CIRCUIT............................1065
ECT SEN/CIRCUIT.....................................0117
ECT SEN/CIRCUIT....................................0118
ECT SENSOR............................................0125
ENG OVER TEMP.......................................0217
ENG OVER TEMP.......................................1217
ENGINE SPEED SIG...................................0725
ETC ACTR.................................................1121
ETC FUNTION CIRC..................................1122
ETC MOT..................................................1128
ETC MOT PWR...........................................1124
ETC MOT PWR...........................................1126
EVAP GROSS LEAK....................................0455
EVAP PURG FLOW/MON............................0441
EVAP SMALL LEAK....................................0442
EVAP SYS PRES SEN.................................0452
EVAP SYS PRES SEN.................................0453
EVAP VERY SML LEAK...............................0456
EVAP VERY SML LEAK...............................1456
FTT SEN/CIRCUIT.....................................0182
FTT SEN/CIRCUIT.....................................0183
FTT SENSOR.............................................0181
FUEL LEVEL SEN SLOSH...........................0460
FUEL LEVEL SEN/CIRC.............................1464
FUEL LEVEL SENSOR................................0461
FEUL LEVEL SEN/CIRC.............................0462
FUEL LEVEL SEN/CIRC.............................0463
FUEL SYS-LEAN-B1...................................0171
FUEL SYS-RICH-B1...................................0172
H02S1(B1)...............................................0132
H02S1(B1)...............................................0133
H02S1(B1)...............................................0134
H02S1(B1)...............................................1143
H02S1(B1)...............................................1144
H02S1 HTR (B1).......................................0031
H02S1 HTR (B1).......................................0032
H02S2(B1)...............................................0138
H02S2(B1)...............................................0139
H02S2(B1)...............................................1146
H02S2(B1)...............................................1147
H02S2 HTR (B1).......................................0037
H02S2 HTR (B1).......................................0038
IAT SEN/CIRCUIT.....................................0112
IAT SEN/CIRCUIT.....................................0113
IAT SENSOR.............................................0127
INT/V TIM CONT-B1..................................0011
INT/V TIM CONT-B1..................................1111
ISC SYSTEM.............................................0506
ISC SYSTEM.............................................0507
KNOCK SEN/CIRC-B1...............................0327
KNOCK SEN/CIRC-B1...............................0328
L/PRESS SOL/CIRC..................................0745
MAF SEN/CIRCUIT....................................0101
MAF SEN/CIRCUIT....................................0102
MAF SEN/CIRCUIT....................................0103
MAF SENSOR...........................................1102
MIL/CIRC.................................................0650
MULTI CYL MISFIRE..................................0300
NO DTC DETECTED/FURTHER TEST..........FLASHING
NO DTC (NO TROUBLE CODE)..................0000
O/R CLUTCH SOL/CIRC............................1760
P-N POS SW/CIRCUIT...............................1706
PNP SW/CIRC..........................................0705
PURG VOLUME CONT/V............................0444
PURG VOLUME CONT/V.............................0445
PURG VOLUME CONT/V.............................1444
SENSOR POWER/CIRC..............................1229
SFT SOL A/CIRC........................................0750
SFT SOL B/CIRC........................................0755
TCC SOLENOID/CIRC................................0740
THERMSTAT FNCTN...................................0128
TP SEN 1/CIRC.........................................0222
TP SEN 1/CIRC..........................................0223
TP SEN 2/CIRC.........................................1223
TP SEN 2/CIRC.........................................1224
TP SENSOR...............................................0221
TPV SEN/CIRC A/T....................................1705
TW CATALYST SYS-B1...............................0420
VC CUT/V BYPASS/V .................................1491
VC/V BYPASS/V.........................................1490
VEH SPD SEN/CIR AT................................0720
VEH SPEED SEN/CIRC..............................0500
VENT CONTROL VALVE..............................0447
VENT CONTROL VALVE..............................1446
VENT CONTROL VALVE..............................1448
I have the same car & just changed it myself. It's the driver's side, when standing in front of the car, you should see a red cable that connects on the right side of the engine & runs behind & down then twists into the exhaust pipe next to the cat. The bad part after getting the sensor out of the pipe is removing the 2 clips that run down & behind before the cat. The other clips aren't so bad because they aren't in a cramped hole. I thought next time I might try large sharp toenail clippers to snip them off.... Got a $90.00 sensor from advance auto. I've read that this requies reprogramming from Nissan, but I'm not too sure how needed it is. The Nissan guy told me you don't always need to regrogram, but that is another $87.00. I changed mine the problem improved the code went away, I'm still trying to sort out other codes but I think I got this one taken care of.
Next time, use Locktite or something similar to hold the bolts and/or nuts in place.
What causes a obdII code p0505 on a 1997 acura integra and how to fix it?
Is your idle surging if so 1st just check your coolent level if low you will get this code. on the under side of the throttle body their is a idle air control valve some people call it the fast idle valve replace it. remove body- clamp off the coolent lines -unplug -remove screws and swap out for new. Hondadoc2112
Why is your 2004 Chevy Impala V6 3.4 L check engine light turned on steady?
You may want to check to make sure that you gas cap is on correctly, usually a check engine light mean an emissions problem. Also, if you have recently added gas to your vehicle from someplace other than your usual gas station this could be a cause as well, bad gas. what you would need to do is either get the gas out or run it and fill it up. it will usually take a full tank of gas to get the light to rurn off. if this doesn't work, then you want to take it in the a mechanic. But my repair book for my 2003 impala tells us to take these steps first.
How do you reset the 'check engine light' on a 1990 Honda Prelude?
There are three ways to reset the check engine light. The easiest way is to disconnect the battery, and then reconnect. This resets the cars computer. Second, you can plug in a code reader which can reset the computer. Lastly, you can fix the problem. Sometimes the check engine light on a car will come on after a certain amount of miles and either of the first two methods can correct the problem. Usually when the light comes on it is a sign of a real problem and it must be corrected.
Yes and no. I have a 99 explorer xlt, I found my thermostat stuck open which would not allow engine to come to operating temp. The o2 sensors only work properly if engine is at operating temp.It also could be the ECT sensor(engine coolant temp).I suggest changing thermostat first then clear code and drive 50-60 miles then retest.
In a 1994 4 cylinder Ford Ranger the check engine light is on where is the CO2 sensor?
their is more than one oxygen sensor but the one that is probly bad is on the exhaust system. otherwise I would check the map sensor.
Why is the check engine light on after using the traction control system in my car?
possible abs or vvs speed sensor you need to check codes and go from there
What are common problems connected to the service engine light on a 1998 Nissan altima?
If it is a SERVICE engine in most cases is a factory, Matinence reminder(change oils fluids, tune up, ect...), In some it could be a engine emissions problem, Bet normly that turns on a CHECK ENGINE LIGHT.
hope that helps !!
C-YA
How do you reset service engine soon light?
turn the key back and forth 4 times dont start just up until notch b4 turnin on
Your check engine light will not come on in the auxilary (accesory) position. It comes on when the key is in the on (run) position to check the warning lights just before you start the vehicle.
How do you reset subaru check engine light?
Most auto parts stores have a check engine light reader that you can borrow for free to read the code and also to reset the check engine light. If they are not busy, they may even do it for you for free. Support your local parts store! Worst case: Take it to your dealer or buy a check engine light reader that can also reset it.
The 0400 - 04## are all emissions related, can be caused by something as trivial as an improperly tightened gas cap or as complex as the EVAPORATIVE EMISSIONS CONTROL SYSTEM, which has a series of hoses, purge valve and charcoal vapor canister filter controlled by the computer. Older cars normally develop leaks in the hoses that can be determined using specialized leak detection testing, normally not for diy level of repair. Most of the 0400 series codes will not affect drive-ability but should be treated ASAP
What is difference between flashing and steady check engine light in 1999 ford ranger?
A flashing check engine light means an engine cylinder misfire has been detected
How many miles before obd codes reset?
This will vary depending on the vehicle. Some may require a certain number of ignition cycles. Others may require a certain number of miles (eg: 20 miles). The course of driving over a week should satisfy the requirements.
Did you reset the computer after you did the work? If not, then connect a scan tool to the car and reset the codes/computer. That should do the trick.
How do you make a check engine light turn off on a Isuzu rodeo?
You need a OBD2 sensor if the Isuzu is 1996 or above and OBD1 sensor if it under 1996. They typically cost between 50-100 dollars. You plug it into your OBD female end and check whats wrong with your codes and then trip your Check Engine Light. That's the only way. Or pay a shop $75 bucks to do it, and they'll tell you exactly whats wrong with it.
