2000 blazer trouble codes
 

we have a 2000 blazer ls with 136000 miles
it has given me codes today of
p0300
p507
p1133
p1153
p1380
p301


and chassis codes
c0226
c0225
c0221
c0223
c0387


We just got this blazer for the wife no rust and new transfer case very nice truck just need to fix these problems we sold our ford explorer to buy the Blazer... Thanks for the help

Here's a starting point in identifying trouble codes. https://blazerforum.com/forum/diagno...codes-dtcs-49/

also the gas milage sucks. went 65 miles and used a 1/2 tank off gas

When a DTC, (Diagnostic Trouble Code) sets in memory, additional DTC's may be set after it, and they may or may not actually be a problem. When troubleshooting DTC's, the first one set must be diagnosed, repaired, and a General Motors Driving Cycle must be performed to confirm the repair.

When multiple DTC's are set, write them down in the order they are retrieved. Then clear all of the memories: pending, current and history. Entry level scan tools, (those less than ~$1500) will not access the history files. After memories are cleared, perform the General Motors Driving Cycle and retrieve the DTC's. Then diagnose and repair the first one retrieved, and repeat the drive cycle to confirm the repair. Repeat the process until no DTC's are present after the drive cycle is performed.

Keep in mind that disconnecting the battery does NOT clear DTC's in the history file. It will turn the check engine light off, unless there is a hard fault present, in which case, it will come right back on.

The drive cycle instructions for each step must be followed exactly as written. Each step must be performed, but the steps do not need to be performed in order.

You have many codes relating to the oxygen sensors, no surprise about the crap fuel econ. Also there are multiple misfire codes and one for cyl 1. The code p1380 might be related to a vacuum leak. VERY VERY common for the hose to fall off the vacuum canister in the drivers fender. Also look for dry rotted vac hoses. See also the p0507 high idle code.


The first 4 codes for the chassis is for the front abs signals missing and the last one is the transfer case failed to shift. Failing to shift could be caused by several things.

Yep, what the captain said!!:icon_dance-cpatch:

I picked up 2 new o2 sensors and a new idle air control valve just have to get them put on. Were is bank 1 and bank 2 that is the 2 o2 sensors that are said to be bad

Did you see post #4? DTC's never tell you that parts are bad. They tell you what circuit is/was out of range.

They are in the exhaust before the cat converter. I'd check for a blown o2 sensor heater circuit fuse too.