Question about 1999 Buick Regal

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I have a 2000 Regal GS. The check engine light flashes above 70 MPH. I got the code scanned and it first said misfire on cylinder 1. then now it says misfire on multiple or random cylinders. i have changed plugs, wires, and swapped coil packs and also dumped injector cleaner in the tank. i also got a p0440 code for the emission system but now that has gone away. i am wondering what else to try and if the p0440 code cause the other code to go off or the other way around. everything runs fine and doesnt run rough or struggle while driving.

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  • 175 Answers

Possibly oxygen sensor/s?

Posted on Jul 01, 2009

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1 Answer

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When a check engine light is flashing, you stop
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1 Answer

Why wont my 1991 accord lx Rev past 3500 with check engine light on


Hello! See photo below of On Board Diagnostic 1 connector location...Push a paper clip into the two female pins...Turn on the key...The Check Engine Light will flash a two digit code...Example ; 5 long flashes folowed by 2 short flashes= code 52...See list below...When you have the code/codes send a comment...Guru...saailer...



Code 0 and 11 Electronic Control Module (ECM)
Code1 Heated oxygen sensor A
Code 2 Oxygen content B
Code 3 and 5 Manifold Absolute Pressure
Code 4 Crank position sensor
Code 6 Engine coolant temperature
Code 7 Throttle position sensor
Code 8 Top dead center sensor
Code 9 No.1 cylinder position sensor
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Code 12 Exhaust recirculation system
Code 13 Barometric pressure sensor
Code 14 Idle air control valve or bad ECM
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Code 16 Fuel Injector
Code 17 Vehicle speed sensor
Code 19 A/T lock-up control solenoid
Code 20 Electric load detector
Code 21 V-TEC control solenoid
Code 22 V-TEC pressure solenoid
Code 23 Knock sensor
Code 30 A/T FI signal A
Code 30 A/T FI signal B
Code 41 Heated oxygen sensor heater
Code 43 Fuel supply system
Code 45 Fuel supply metering
Code 48 Heated oxygen sensor
Code 61 Front heated oxygen sensor
Code 63 Rear heated oxygen sensor
Code 65 Rear heated oxygen sensor heater
Code 67 Catalytic converter system
Code 70 Automatic transaxle
Code 71 Misfire detected cylinder 1
Code 72 Misfire detected cylinder 2
Code 73 Misfire detected cylinder 3
Code 74 Misfire detected cylinder 4
Code 75 Misfire detected cylinder 5
Code 76 Misfire detected cylinder 6
Code 80 Exhaust recirculation system
Code 86 Coolant temperature
Code 92 Evaporative emission control system



2_19_2012_11_59_24_am.jpg

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I have a 99 marquis. My engin light has been on for awhile because of an evap leak. When I was driving 70 mph on the freeway it started flashing. I tried counting the flashes but I was driving so I might...


Not a specfic code, but it means the problem is more serious and needs to be repaired now. The flash was probably from the engine misfire. Scan for codes and repair it before further, more costly damage occurs.

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1 Answer

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