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2002 deville dts
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30 Posts
Discussion Starter #1
Okay guys when i start the car everything works like its going to fire right up except it doesn't. Starter sounds like it cranks the motor but no fire. This happened about 2 months ago thought nothing of it as second start it cranks up but it's happening more often now. It only happens after sitting over night but always fires up 2nd time after that no problems rest of day.No codes pop up. What gives bad gas? Any thoughts would be appreciated.
 

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'98 STS (RIP @ 206,xxx miles)
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4,854 Posts
Possibly fuel pump is not priming the fuel lines properly or the pump check valve is leaking.

Try this; without trying to start the engine, turn key to RUN then back to OFF several times. Then start the engine. If that makes a difference, have someone check the fuel pressure when you stop the engine and make note of how rapidly or slowly the fuel pressure falls with the key OFF.
 

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2002 deville dts
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30 Posts
Discussion Starter #4
today the codes came up as

P0133 OBD-II Trouble Code

This is considered a generic powertrain DTC (code). That means it's definition is the same for all makes and models of OBD-II vehicles, however specific repair steps may vary depending on the vehicle. This trouble code involves the front oxygen sensor on Bank 1.

This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.

Causes- A code P0133 may mean that one or more of the following has happened:
•The oxygen sensor is faulty
•The wiring to the sensor is broken / frayed
•There is an exhaust leak
Possible Solutions- The simplest thing to do is to reset the code and see if it comes back.

If the code comes back, the problem is more than likely the front Bank 1 oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:
•Check and fix any exhaust leaks
•Check for wiring problems (shorted, frayed wires)
•Check the frequency and amplitude of the oxygen sensor (advanced)
•Check for a deteriorating / contaminated oxygen sensor, replace if necessary
•Check for inlet air leaks
•Check the MAF sensor for proper operation

P0153 OBD-II Trouble Code

This involves the oxygen sensor upstream the catalytic converter on Bank 2

This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.

Causes- A code P0153 may mean that one or more of the following has happened:
•The oxygen sensor is faulty
•The wiring to the sensor is broken / frayed
•There is an exhaust leak

Possible Solutions- Things that may fix the problem include:
•Check and fix any exhaust leaks
•Check for wiring problems (shorted, frayed wires)
•Check the frequency and amplitude of the oxygen sensor (advanced)
•Check for a deteriorating / contaminated oxygen sensor, replace if necessary
•Check for inlet air leaks
•Check the MAF sensor for proper operation
•Replace the Bank 2 oxygen sensor upstream of the catalytic converter

Alright
If the code comes back, the problem is more than likely the front Bank 1 oxygen sensor so where do i find the correct part and where is this located on the car? If it is the problem will this also take care of the P0153 code? Thanks
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
You just have to post the code definitions, not all that.

P0133 - O2 sensor circuit slow response B1S1
P0153 - O2 sensor circuit slow response B2S1

The bank 1 sensors are in the exhaust manifolds. But neither of these codes are causing a no start.
 
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