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Chevrolet Blazer Trouble Codes

33 messages,  Last post on Jul 14, 2008 at 10:21 PM

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#23 of 33 Re: 2001 Chevy Blazer Service Engine Soon Light [renoky] by maurerush2112 Jan 15, 2008 (7:01 pm)
Replying to: renoky (Jan 14, 2008 4:14 pm) you need to get a diagnostic check. If you don't have access to a diag. tool, I believe autozone does that for free. Get the trouble codes stored in the pcm out so you know where to start...could be one of hundreds of problems.
#24 of 33 no code by roddoghd Jan 18, 2008 (12:02 pm)
OK FIRST CAR GAVE ME CODE FOR MISSFIRE #1CYLENDER CODE CLEARED THEN 2OR3 DAYS LATER CAR WAS RUNNING JITTERY ON THE FREEWAY AT CRUISING SPEED PUT INJECTOR CLEANER IN DROVE FOR THIRD OF TANK STARTED HAVING LACK OF POWER THEN POWER WOULD KICK BACK IN AND DRIVE FINE. I PARKED , THEN CAME BACK 2 DAYS LATER CAR FIRED ON 1 OR 2 CLENDERS THEN DIED CHECKED FOR CODES NO CODES CRANKES BUT WONT START. FUEL TO RAIL SPARK NEW CAP ROTOR PLUGS USED STARTING FLUID DOWN THROTTLE BODY NO START, NO CODES WOW I AM AT A LOSS IS IT THE ECM OR JUST THE CRANK SENSOR OR ONE OF THE OTHER SENSOR OR A COBO OF SENSORS BUT WHY IS THERE NNO CODES GIVEN Replies to this message: jlflemmons (Feb 09, 2008 9:01 am)
#25 of 33 Re: no code [roddoghd] by jlflemmons Feb 09, 2008 (9:01 am)
Replying to: roddoghd (Jan 18, 2008 12:02 pm) Well, if the crank sensor is not working you should get a code 0335 or 0336. And if the sensor has completely died, she ain't gonna start.
#26 of 33 Don't know by skiextreme2 Feb 24, 2008 (7:51 pm)
Hi all, I had to get through some fairly deep water (on the road) and afterwords the service engine soon light flickered a few times then shut off. I was at about the same speed as the pickup that was next to me. About four days later the service engine soon light came on and hasn't gone off. Any possibilities other than getting codes? Like maybe moisture somewhere it shouldn't be?
#27 of 33 Reving up chevy blazer 6 cyl by labowners Apr 14, 2008 (10:43 am)
I have a 1995 chevy blazer that after it starts it revs up and down and misses like crazy. The check engine light comes & goes. I've already changed the fuel pump and spider injector about 1 year ago. The check engine code comes up emissions control, but that wouldn't make the engine rev up & down on it's own. It's so loud that it makes my cat converter knock. I checked it & it's fine. Anyone know what this could be?
#28 of 33 1995 OBD1 with OBD2 connector by blockhead1 May 11, 2008 (7:07 pm)
I recently purchased a 95 Blazer. The body and interior are in great shape but the transmission was bad, and it had sat up for almost four years. I got it running and rebuilt the tranny but, as soon as I drove it, the check engine light came on. I have a code scout 2500 scanner that will read both OBD1 & 2 codes but I have a problem. The computer is an OBD1 but the connector is a 16 pin OBD2 type. My scanner will not communicate with the computer, any advice? Replies to this message: jlflemmons (May 11, 2008 7:28 pm)
#29 of 33 Re: 1995 OBD1 with OBD2 connector [blockhead1] by jlflemmons May 11, 2008 (7:28 pm)
Replying to: blockhead1 (May 11, 2008 7:07 pm) On an OBD1 system, short the A and B pins in the connector with a paper clip. Look closely and you should see the pin identifiers on the connector under the dash. This will put the system into a diagnostic mode.   The SES or CES lamp will flash a 12 (flash, pause, flash flash) three times to indicate that the ECM is in diagnostic mode. After a pause, the lamp will flash the numeric code for any faults stored. It will flash each code three times, then go back to flashing the '12" code.
#30 of 33 P0155 code 2002 Blazer by skiextreme2 May 14, 2008 (1:01 pm)
I get the P0155 and it says heater circuit malfunction, bank 2 sensor 1. The store sold me a $97 o2 sensor and it didn't solve the problem. It's a 2002 Blazer. 4.3, auto, 4WD.   Any idea how to figure out a problem with a heated circuit related to oxygen sensor bank 2 sensor 1. I was told it's one of the white wires but I don't have a clue as to how to check something like that and there isn't any space to chase the wire and see where it goes (that I can see). Or, maybe someone has had this problem? It started when I went through some water that was up to the doors. The CEL blinked a few times then shut off and two days later it came on and hasn't gone off except when I cancelled it after installing the o2 sensor. Help!   Thanks, Rick
#31 of 33 service engine codes on my 95 blazer by jt122801 May 30, 2008 (7:16 am)
my service engine soon light came on i went to auto zone for a diagnostic test the codes that came up are PO300,PO135,PO172 I changed the heat sensor the service light still apprears any suggestions
#32 of 33 Lots of codes by 66chevytruck Jun 02, 2008 (3:45 pm)
I have a 2001 Chevy Blazer 4.3L 4x4. I had some codes come up and i replace the smog pump and the drivers side check valve for the secondary air injection system. the valve burned up and so did the hoses so i disconnected everything until i got a new check valve. the pump was fine besides some debris which i cleaned out, but i hard wired it to check n it was still working. the day after i fixed everything i was driving it and the check engine light started flashing. i pulled off and shut the blazer off, turned it on n it stayed on. it kept flashing when i did over 30 mph or 1500 rpm. the codes i pulled were: PO102: mass airflow sensor circuit low frequency PO141: O2 sensor bank 1 sensor 2 PO300: random misfire PO410: secondary air injection system PO463: Fuel level sensor 1 circuit high voltage B2961: key in ignition circuit malfunction CO265: EBCM motor relay circuit CO245: EBCM Control valve circuit CO246: " CO251: " CO252: "   any ideas where to start? what is necessary right now and what i can hold off on? im broke and this is my only vehicle also if you have an idea of how much the parts will cost that would e helpful. Thank you. Replies to this message: johnss10 (Jul 14, 2008 10:21 pm)

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