**Diagnostic Trouble Codes**

[BSFL89]

Didnt realize there was a thread for this. Made a post already in the 2nd gen s10 forum

Ok so here is the deal. I bought a 98 s10 lx off my girlfriends dad for 1500 and it only has 87000 miles and is in really good shape. 5 speed 2.2 L rwd.

Well it was having some trouble starting in the cold so I ended up getting the batter replaced this past weekend. About a week or two before I did that, I got a check engine light on and so I thought it was just the battery. Well after getting it replaced the CEL was still on, so I went to autozone and ran the codes. It spit out five and here is what they are :

p0138 Def- H02S 12 circuit condition (Heated Oxygen sensor) bank 1 sensor 2
1st cause - o2 sensor defective
2nd - running rich/lean
3rd engine misfire conditon
4th fuel pressure high or low fuel pump or pressure regulator

p0341 Def- Cam sensor condition
1st cause - cam sensor defective
2nd cause - check connector and wiring to sensor
3rd cause - engine mechanical condition timing belt or chain out of time
4th cause - cylinder misfire check ignition for faults

p0335 Def - Crankshaft position sensor condition
1st cause - crank sensor defective
2nd cause - check connector and wiring to sensor
3rd cause - check trigger wheel for damage

p0300 Def - Cylinder misfire detected - random cylinders
1st cause - Ignition system fault - spark plug wires coil
2nd cause - vaccum leak
3rd cause - Injector fault
4th cause high or low fuel pressure

p0342 Def - Cam sensor condition
1st cause - cam sensor defective
2nd cause - check connector and wiring
3rd cause - engine mechanical condtion

The guy at autozone said odds are its the 02 sensor, specifically the front one which would be 20-30 to replace, rear being like 80. So I am wondering if anyone can confirm it is the 02 sensor or had similiar problem and what was the cause. He said 02 sensor can throw a bunch of codes.

Thanks for any help, I am a college kid and have limited time and cash, but I am a capable mechanic and can replace/do stuff myself, just not the best at diagnosing problem and dont have enough time to look at everything.

[Yogi]

I would suspect the cam sensor before the O2 sensor. You've got 2 codes for a bad cam sensor and that could cause a missfire that trips the O2 code.

I would try replacing the cam sensor, resetting the PCM, and see how that does.

[mcdanida]

I've now just learned to live with the SES light on at all times. These damn P0441 and other useless codes have caused no operating problems with my S-10. I just use a piece of electrical tape to cover the SES light now.

[300man]

Just purchased a 2001 s10 2.2, 5 spd. Really like the truck, on my way home with it i filled it with 87 octane fuel. About 200 miles into new ownership the SES light comes on. Code reads P0172 System Too Rich. Came on while driving at steady speed of 60mph.

I read and cleared the code yesterday morning. In the afternoon the SES light came back, on my way home from work while gently shifting through the gears. Same P0172 code...truck runs well has a slightly high idle (850 - 900rpm) when fully warmed up but is steady.

When cold it starts well and fast idles at about 1400rpm for about 10 sec and slowly lowers to about 1100 with a slight stumble occasionally. If i then rev the engine using 1/8 - 1/4 throttle it bogs a bit between 1100 rpm and 2000 rpm then will settle back to a 1100rpm fast idle.

I'm thinking vacume leak...throttle body/hoses/intake???? BTW both 02 sensors were replaced and had recent tuneup by former owner.

Please help!

[Bill Wheats]

You should start your own thread.

[300man]

Quote: Originally Posted by Bill Wheats

You should start your own thread.

ok

[bryguy2105]

New member here. I own a 96 4.3L and my truck had broken down just after a trip I made. The code I'm getting is P1351 and I'm having difficulty finding out exactly where this open circuit is. Any thoughts and or ideas would be greatly appreciated.

[lesterl]

Quote: Originally Posted by bryguy2105

New member here. I own a 96 4.3L and my truck had broken down just after a trip I made. The code I'm getting is P1351 and I'm having difficulty finding out exactly where this open circuit is. Any thoughts and or ideas would be greatly appreciated.

Did you not just read the thread directly above your post?

[tystoy]

so when I get a code 12 on my 94 cpi (vin W) does that mean its showing no codes or I have to wait?

[lesterl]

Code 12 is no pulse from distributor basically (engine is not turning) That is normal in the key on engine off A/B terminals shorted mode. Any OTHER codes will be followed after 3X readout of the code 12, the sequence of codes will progress with each code blinked out 3X and ending in code 12 blinking 3X, now this all applies to OBD1, OBD2 you need a special reader to decipher the datastream, there are some bastardchild OBD1.5's from what I hear and good luck with those as I dont have any clue there.

P.S. the OBD2 readers can be had for under $100 for just a basic reader. I think Harbour Freight carries two for $50, 1 for $89, 1 for $99, and 1 for $119.

[tystoy]

I have the OBD1 that I can get the codes out of with the SES light. I actually get the pleasure of using a test light and back probing the E6 wire from the CPU. I am getting no codes.

[supasoulja]

What should I do If i have a code P0144? 99 astro

[lesterl]

http://service.gm.com/gmspo/mode6/pd...t43WXLD_yE.pdf

Bottom of page 9, looks like it is saying you have a rich condition, either the sensor is faulty or you have a fuel leak in the plenum on that bank.