My saga continued about my car please read and help asap - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-04-2004, 09:30 PM   #1
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Default My saga continued about my car please read and help asap

let me tell ya, it wasnt my computer, or so they said. they said it was my alternator and so i got a new one of those and a battery because they both tested bad at oriellys. i also bought a scan tool and the only thing that is coming up is the cam position sensor that i have already replaced 2 times and i also replaced the interrupter magnet. also put a new timing chain and made sure that it was still in time. i am so ticked right now because i ama having the same problem. my car is starting off in a higher gear and leaving me with no guts. even when i manually start of in first gear, i still have no guts. what gives. actually 2 codes come up, one is the cam position sensor circuit range or performance and the other is the battery voltage out of range.

Code #: PO341 AND
P1630.

Im so disgusted right now, please someone help me before i go insane.
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Old 03-04-2004, 11:05 PM   #2
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look yall, im in serious need of some help here. i am about to cry because i cant figure out what is wrong and if i dont here something in a little while then i am going to have to put it in the shop in the morning!!! and i really dont have the money anymore.
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Old 03-05-2004, 01:13 AM   #3
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You're gonna have to calm down and wait a bit. I don't have any of my books here. I'll be home at 10:30 WST.
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Old 03-05-2004, 10:09 AM   #4
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Hey bro I hear ya...

Found this on alldata for my 97 SSE... hope it helps you out somehow!

-Daron


P0131

CIRCUIT DESCRIPTION
The PCM supplies a bias voltage of about 450 mV between the HO2S signal and low circuits. When measured with a 10 megohm digital voltmeter, this may display as low as 350 mV. The oxygen sensor varies the voltage within a range of about 1000 mV when the exhaust is rich, down through about 100mV when exhaust is lean. The PCM constantly monitors the HO2S signal during closed loop operation and compensates for a rich or lean condition by decreasing or increasing injector pulse width as necessary. If the HO2S 1 voltage remains excessively low for an extended period of time, DTC P0131 will be set.

CONDITIONS FOR SETTING THE DTC



No active Transaxle, Throttle Position (TP) sensor, EVAP system, misfire, IAT sensor, MAP sensor, fuel trim, fuel injector circuit, ECT sensor, or MAF sensor DTC(*) present.
Closed loop commanded air/fuel ratio is between 14.5 and 14.8.
Throttle angle is between 3% and 40%.
HO2S 1 signal voltage remains less than 175 mV during normal closed loop operation.
The above conditions are present for 50 seconds.
OR



HO2S 1 signal voltage remains less than 600 mV during power enrichment mode fuel control operation.
The above condition present for 60 seconds.
ACTION TAKEN WHEN THE DTC SETS



The PCM will illuminate the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
The PCM will store conditions which were present when the DTC set as Freeze Frame and Fail Records data.
CONDITIONS FOR CLEARING THE MIL/DTC



The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic has been run and passed.
The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
The DTC can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.
DIAGNOSTIC AIDS
Check for the following conditions:



Heated oxygen sensor wiring.
The sensor pigtail may be routed incorrectly and contacting the exhaust system.



Poor PCM to engine block grounds.
Refer to Ground Distribution in Electrical Diagnosis.



Fuel pressure.
The system will go lean if pressure is too low. An excessively lean condition can cause DTC P0131 to set.



Refer to Fuel System Pressure Test .
Fuel injector(*).
Refer to Fuel Injector Coil Test (ECT Within 10-35C) . See: System Diagnostic Tests\Fuel Injector Coil Test (ECT Temp Within 10-35 Deg C)
Refer to Fuel Injector Coil Test (ECT Outside 10-35C) . See: System Diagnostic Tests\Fuel Injector Coil Test (ECT Temp Outside 10-35 Deg C)
Vacuum leaks.
Check for the following conditions:



Disconnected or damaged vacuum hoses.
Incorrectly installed or malfunctioning crankcase ventilation valve.
Refer to Positive Crankcase Ventilation Valve .
Vacuum leaks at the throttle body, EGR valve, and intake manifold mounting surfaces.
Exhaust leaks.
An exhaust leak may cause outside air to be pulled into the exhaust gas stream past the HO2S, causing the system to appear lean. Check for exhaust leaks that may cause a false lean condition to be indicated. Refer to Exhaust System.



MAF sensor.
Disconnect the MAF sensor. If the lean condition is corrected, replace the MAF sensor.



Fuel contamination.
Water, even in small amounts, can be delivered to the fuel injectors. The water can cause a lean exhaust to be indicated. Excessive alcohol in the fuel can also cause this condition. Refer to Alcohol/Contaminants-in-fuel Testing Procedure .



If none of the above conditions are present, replace the affected HO2S. Refer to Heated Oxygen Sensor (HO2S) . See: Oxygen Sensor
TEST DESCRIPTION
Number(*) below refer to the step number(*) on the Diagnostic Table.



DTC P0131 failing during power enrichment operation (TP angle above 60%) may indicate a condition described in Diagnostic Aids. If the DTC P0131 test passes while the Fail Records conditions are being duplicated, an intermittent condition is indicated. Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.
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Old 03-05-2004, 11:48 AM   #5
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sorry will, not trying to rush anyone but these problems are driving me nuts. i put my car back into another shop this morning and maybe they can tell me something and fix it for once and for all.

thanks

jeff
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Old 03-05-2004, 01:07 PM   #6
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Post what the issue was/is once you get it back.
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Old 03-05-2004, 01:29 PM   #7
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dont worry, i will. i dont want anyone to have to go through what i am going through now!!LOL!!!
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Old 03-05-2004, 02:54 PM   #8
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Yes, PLEASE SOMEONE HELP THIS CHILD, HE IS DRIVING ME CRAZY!!! I appreciate all of your advice/help. This site has been a blessing to us.
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Old 03-05-2004, 04:05 PM   #9
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by the way thanks for deleteing my post!!

on the other hand i dont get why it would start out in a higher gear
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Old 03-05-2004, 04:38 PM   #10
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who was deleting posts?
i wonder can i delete posts naw maybe not naw i dont wanna do that though
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