GT210

Okay guys I have a 04 gt that keeps popping up check engine light and the codes are P2197 and P0175 and here is the freeze frame information from the scanner

Parameter Description Results
DTC for which Freeze Frame was Stored P0175
Fuel System 1 Status Closed Loop
Fuel System 2 Status Not Supported
Calculated LOAD Value 90.20 %
Engine Coolant Temp 185.00 °F
Short Term Fuel Trim - Bank 1 -5.47 %
Long Term Fuel Trim - Bank 1 4.69 %
Short Term Fuel Trim - Bank 2 -18.75 %
Long Term Fuel Trim - Bank 2 -23.44 %
Engine RPM 2,927.50 rpm
Vehicle Speed Sensor 32.31 mph
Ignition Timing Advance #1 Cylinder 11.50 °
Intake Air Temperature 89.60 °F
Air Flow Rate Mass Air Flow Sensor 14.20 lb/min
Absolute Throttle Position 63.14 %
Oxygen Sensor Output Voltage (B1-S1) 0.77 V
Short Term Fuel Trim (B1-S1) -5.47 %
Oxygen Sensor Output Voltage (B1-S2) 0.02 V
Short Term Fuel Trim (B1-S2) 99.22 %
Oxygen Sensor Output Voltage (B2-S1) 0.23 V
Short Term Fuel Trim (B2-S1) -18.75 %
Oxygen Sensor Output Voltage (B2-S2) 0.02 V
Short Term Fuel Trim (B2-S2) 99.22 %

I know what the codes are but I really dont understand this chart could someone help me on this please.

castorino220

I had the same problem. Mine was an easy fix, cleaned the MAF with MAF cleaner, fixed. I would start there if i were you. Good luck

petrock

P2197 Heated Oxygen Sensor (Bank 2 Sensor 1) Biased / Stuck Lean
Possible Causes Setting Conditions

• Check for air leaks in the Air Induction system (e.g., in the intake manifold)
• Check for air leaks in the exhaust manifold and in the exhaust pipes
• Check for air leaks in the EGR system and in its related hoses and/or valve
• Check for air leaks in the PCV system and in its related hoses and/or valve
• Check for engine vacuum leaks or the dip stick is not seated
• Fuel System problem: damaged fuel pressure regulator or low fuel pressure
• HO2S connector is damaged (check pins for damage, and for moisture)
• HO2S has failed (it may be contaminated with fuel, silicone or water)
• Induction System problems such as air leaks after the MAF sensor
• PCM has failed

P0175 System Too Rich (Bank 2)

• The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled There could be a vacuum leak. There could be a fuel pressure or delivery problem
• There could be a vacuum leak.
• There could be a fuel pressure or delivery problem

From the readings, the codes look correct. The interesting bit of the info from the scanner is the short term & long term fuel trim numbers.

Short Term Fuel Trim - Bank 1 -5.47 %
Long Term Fuel Trim - Bank 1 4.69 %
Short Term Fuel Trim - Bank 2 -18.75 %
Long Term Fuel Trim - Bank 2 -23.44 %

Negative values mean it is removing fuel to correct a rich condition. Positive values means it is adding fuel to correct a lean condition. If you add the short term & long term together for a given bank, it should not exceed 10% or go below -10%. Ideally, you want the STFT to be close to zero. The LTFT is supposed to adjust to keep the STFT around zero.

CalBoy101

(whoops, accidental post)

GT210

@castorino220 I have cleaned the MAF already and still the same pops up I'm leaning towards vacuum leak.

GT210

@petrock Yea i'm double checking everything again cause it seems like I may have a vacuum leak some where just have no clue where it could be cause when I start the car I hear no hissing what so ever. But that doesn't meant it cant be a small leak. What about a leak where my exhaust hooks up to the headers on the driverside right before the o2 could this be causing this? Cause I have already changed both o2 sensors on bank 2 and I just replaced the intake as well again.

dawson1112

An exhaust leak will cause a lean reading for sure if it is before the upstream 02s. Since extra air is being introduced to the exhaust gas . I would expect you could hear some ticking from the exhaust .

A vacuum leak could very well cause a lean code , but I would expect idle to be high or hunting.

GT210

Okay I'm back again lol I got rid of the p0175. I took the intake off that I just got and installed from autozone. I inspected it and this one was cracked as well and causing the rich symptoms. Installed and new intake and the p0175 is gone and now I still have just the p2197 code popping up. I took my alternator off to go get it checked cause I was told that a bad alternator could be causing these problems as well, and the alternator is good. My idle doesnt hang and isnt high right at around 700 800 ish. The car is still hot right now but tomorrow morning I'm going to jack it up and look by the bank 2 sensor 1 and see if I can see something going on there maybe its not tight enough or on there the right way. I also just read someone else is having the same problem and they said it might be the coolant temp sensor would this be a possibility. Also I logged everything from my scan tool here is the new freeze frame.

Parameter Description Results
DTC for which Freeze Frame was Stored P2197
Fuel System 1 Status Closed Loop
Fuel System 2 Status Not Supported
Calculated LOAD Value 100.00 %
Engine Coolant Temp 208.40 °F
Short Term Fuel Trim - Bank 1 1.56 %
Long Term Fuel Trim - Bank 1 0.00 %
Short Term Fuel Trim - Bank 2 32.81 %
Long Term Fuel Trim - Bank 2 0.00 %
Engine RPM 734.25 rpm
Vehicle Speed Sensor 0.00 mph
Ignition Timing Advance #1 Cylinder -10.00 °
Intake Air Temperature 125.60 °F
Air Flow Rate Mass Air Flow Sensor 11.45 lb/min
Absolute Throttle Position 49.41 %
Oxygen Sensor Output Voltage (B1-S1) 0.37 V
Short Term Fuel Trim (B1-S1) 1.56 %
Oxygen Sensor Output Voltage (B1-S2) 0.98 V
Short Term Fuel Trim (B1-S2) 99.22 %
Oxygen Sensor Output Voltage (B2-S1) 0.04 V
Short Term Fuel Trim (B2-S1) 32.81 %
Oxygen Sensor Output Voltage (B2-S2) 1.00 V
Short Term Fuel Trim (B2-S2) 99.22 %

Derf00

P2197 means your O2 sensor is more than likely flaking out.

Also, given the voltage reading (way out of spec on the low end) I would replace it. Spec is 0.1 to 0.9~1.0 for in-spec. You can try to clean it but they tend not to work well when you try to but usually if the 02 sensor is so dirty it's affecting functionality, you may as well replace it.

Bank 2 is the side where cylinders 5-8 are. (drivers IIRC?)

You can test it with a Voltmeter from under the car.
http://www.ehow.com/how_5193043_test-sensor.html

GT210

Ahhhhh I think I understand I figured out what you was saying about the banks and to not exceed 10 or go below -10. Okay so to me this would be point at bank 2 sensor 1 I think I may have a extra sensor laying around I'm gonna try to swap that out and see if that is it I have changed it out once already but maybe that was a dud too or my exhaust isn't exactly bolted up causing air to get in right by the o2 sensor. A light bulb just went off lol you guys are great I Appreciate y'alls help big time lets pray I find it I'm almost there.