I would put a gauge on the fuel rail and get a reading on the fuel pressure. Something is going out and it may be the fuel pump/fuel level sensor assembly. Run a scan and see if you are running real lean.

 

Nope!

My AFR is perfect.

MJJ

 

Supercharger

I never had the codes before. Then, I put on my supercharger - and these were some of the original codes I got right after the supercharger install. However, after the crank sensor re-learn was done, it seemed to run just fine, despite the codes - so I just killed the codes.

But now, I'm thinking that rather than killing the codes, I should find out why they are being thrown and fix the problem if there is one.

MJJ

 

I thought they just popped up with the recent code. Try turning the EVAP Purg Valve around so the plug is forward. If you give me a call I can tell you how to check that it is oriented correctly.

 

Nope!

The purge valve is correct and you can feel it purging. Since it's only an EVAP code it probably only relates to emmissions and not how the car actually runs. So, I'm not too worried. But, with global warming and all, I figured I better get it fixed before Al Gore finds out about it.

 

So Long as you can feel the EVAP Purg Valve pulse vacuum and not make a fluttering sound then it is correct. All that system does is pulse vacuum to the fuel tank, when it is backwards it creates too much vacuum in the tank and causes codes. You replaced the EVAP Purg Valve before didn't you? I just don't know why you would be getting those codes if it is good, the system is so simple.

 

Where are these items on the car.

These are all of the possible parts that I could find on-line in a parts catalog for a 2005 Chevy SSR that COULD have gone bad. But, except for the purge solonoid (which I did already replace) I do not even know where these parts are on the car to even attempt to replace them. If anybody could just point out and show me where these parts are on the engine, it would be much appreciated.

1. EVAP Emission Canister Purge Solonoid Valve (AC Delco 2141678 or GM 12597341) $23.79.

2. Solonoid EVAP Emission Canister Vent Valve 2 Wheel Drive 2-Way Female Red (AC Delco PT250 or GM 12101858) $14.96.

3. EVAP Emission 2 Wheel Drive Canister (AC Delco 215540 or GM 15190482) $96.79.

Since it is reading a high voltage warning, I'm thinking it is 1 or 2. I do not think 3 even has an electrical connection. It is just a can filled with charcol, isn't it?

Thanks!

Matt

 

Here's the funny thing . . .

The code is "Fuel Vapor Temperature Sensor." So, you would think that I would find a part called a "Fuel Vapor Temperature Sensor" and just buy it - replace it - and the problem is solved. But, I cannot find ANY actual part for sale for the Chevy SSR called a "Fuel Vapor Temperature Sensor."

Now how in the world can the voltage be high on my "Fuel Vapor Temperature Sensor" if I do not even have one????

If anyone knows where this mystery part is and what the part number is, please enlighten me.

MJJ

 

code

come on,where are the gm techsgive him a clue where gm hide it,come on

 

My SSR is throwing the following DTC Codes. I know what the codes are, but now what??? What do I need to replace or repair to eliminate each code?

P0420 Catalyst System Low Efficiency

P0430 Catalyst System Low Efficiency Bank 2

P2025 EVAP Fuel Vapor Temperature Sensor Performance

P2027 EVAP Fuel Vapor Temperature Sensor Circuit High

I'm not too worried about P0420 or P0430 because I have headers and hi-flow cats. So, my rear O2 sensors are probably just picking up the fact that I'm not OEM anymore. So, I've just killed the MIL light for these codes.

But, what the heck could be causing P2025 and P2027 and, more importantly, how do I fix it?

Thanks in advance for the input.

Matt

I sorry to inform you but the codes p2025 and p2027 are not good trouble codes. what kind of scanner is being used? we have people that take there car to some auto parts store becouse they will read codes for free and then they come to use with the code and it's not a good code number. I have never heard of a vapor temp sensor. there is a fuel tank pressrue sensor that is part of the EVAP system and it is located on top of the fuel pump module.

 

Laptop

I'm using HP Tuners Suite 2.1.12 software on my laptop to scan my car.

P2025 and P2027 are on the list below which is a partial list of the entire OBD-II DTC Database.

P2020 Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance
P2021 Intake Manifold Runner Position Sensor/Switch Circuit Low
P2022 Intake Manifold Runner Position Sensor/Switch Circuit High
P2023 Intake Manifold Runner Position Sensor/Switch Circuit Intermittent
P2024 Evaporative Emissions (EVAP) Fuel Vapor Temperature Sensor Circuit
P2025 Evaporative Emissions (EVAP) Fuel Vapor Temperature Sensor Performance
P2026 Evaporative Emissions (EVAP) Fuel Vapor Temperature Sensor Circuit Low Voltage
P2027 Evaporative Emissions (EVAP) Fuel Vapor Temperature Sensor Circuit High Voltage P2028 Evaporative Emissions (EVAP) Fuel Vapor Temperature Sensor Circuit Intermittent
P2029 Fuel Fired Heater Disabled
P2030 Fuel Fired Heater Performance

Should I just disable the codes and not worry about it then???

Thanks!

Matt

 

I think I got It!

I looked at the original GM tune from the factory and codes P2025 and P2027 were NOT SES enabled and were set NOT to report any errors. So, somehow, I must have clicked on SES enable. I have now killed the codes - just as the factory originally did.

But, does everybody think I'm right about getting codes P0420 and P0430 just because I have headers and hi-flow cats?

I figure my rear O2 sensors are probably just picking up the fact that I'm not OEM anymore. It's just a pollution efficiency code. So, I've just killed the MIL light for these codes. Do you all think it is something I should try to fix or just keep the codes killed and not worry about it?

Has anyone else with headers and a blower gotten a code from their rear O2 sensors - particularly P0420 or P0430?

Thanks.

 

Some info (maybe you have it already)

DTC P0420 & P0430

The ECM performs this diagnostic test at idle. When the conditions for running this DTC are met, the following occurs:

* The air-to-fuel ratio transitions from lean to rich.
* The air-to-fuel ratio transitions from rich to lean, opposite the first air-to-fuel ratio transition.
* The ECM captures the response time of the front and the rear HO2S when the air-to-fuel ratio transitions occur. The HO2S response time changes from less than 350 mV to more than 600 mV, and from more than 600 mV to less than 350 mV.
* The ECM measures the time necessary for the rear HO2S voltage to cross a reference lean-to-rich threshold, and the time necessary for the front HO2S voltage to cross the same lean-to-rich threshold. The difference between the front HO2S time and the rear HO2S time indicates the oxygen storage capacity of the catalyst. If the ECM detects that this time difference is less than a predetermined value, DTC P0420 for bank 1 or DTC P0430 for bank 2 sets.

DIAGNOSTIC AIDS

* The catalyst test may abort due to a change in the engine load. Do not change the engine load, ensure the AC is OFF, the coolant fan is not cycling, while a catalyst test is in progress.
* Driving the vehicle under the conditions outlined in the Inspection/Maintenance (I/M) section can verify whether the fault is present.
* These conditions may cause a catalytic converter to degrade. Inspect for the following conditions:
* An engine misfire
* High engine oil or high coolant consumption
* Retarded spark timing
* A weak or poor spark
* A lean fuel mixture
* A rich fuel mixture
* A damaged oxygen sensor or wiring harness
* If an intermittent condition cannot be duplicated, the information included in Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC was set.
* The catalyst may have been temporarily contaminated with a chemical from a fuel additive, fuel contamination, or any of the above conditions.

What I don't know is if the O2 sensors have anything to do with engine managment other than reporting that the cats are functioning as expected.

ps. In your other post you mentioned that the code p043 (could that have been p0430) was set after filling the tank with gas. Do/did you put additives in? Before or after filling the tank?