P2A01????DTC Help
Thread Starter
Intermediate
Joined: Apr 2005
Posts: 45
Likes: 0
From: Boise Idaho
P2A01????DTC Help
Rick T did send me a list of diagnostic trouble codes for 2007 Corvette. At 6,400 +/- miles I recently encountered the following code: P2A01 Could anyone help me with this particular code or a list of codes for 2007 Corvette? I have Melrose headers with oxygen sensors, VaraRam intake and 160deg thermo. That's it. Wouldn't worry too much but failed emissions and in Idaho you can't get a license plate w/o it. All help kindly appreciated
Cruising
Joined: Dec 2007
Posts: 14
Likes: 0
May be new
Yes, this could be a code as a result of the headers install, though it was done at the dealership and I may have not noticed the small check engine light in the dash. This is the first emissions check that was due on the car so I may have had the code and not noticed it.
Burning Brakes
Joined: Apr 2008
Posts: 945
Likes: 1
Yes, this could be a code as a result of the headers install, though it was done at the dealership and I may have not noticed the small check engine light in the dash. This is the first emissions check that was due on the car so I may have had the code and not noticed it.
See a recent post from someone else who asked the same question.
Racer
Joined: May 2006
Posts: 402
Likes: 3
Thanks knkali 
This is for:
DTC P2A01: HO2S Performance Bank 1 Sensor 2 , Bank 1 not bank 2! Post Cat. O2.
• The Engine Run Time parameter is more than 5 minutes.
• The ignition 1 Signal parameter is between 10-18 volts.
• The MAF sensor parameter is between 3-50 g/s.
• The Engine Speed parameter is between 500-5,000 RPM.
• The Vehicle Speed parameter is between 24-132 km/h (15-82 mph).
• The Fuel Level Sensor parameter is more than 10 percent.
• The Short Term FT parameter is between -4 and +4 percent.
• DTC P2A01 runs once per drive cycle when the above conditions are met for 1 second.
P2A01
• The control module detects that the sensor did not transition below 200 mV and above 730 mV during the passive test.
• One of the following tests fail:
Lean Intrusive Test
- The control module detects that the sensor is more than 200 mV for 12 seconds.
- The sensor is less than 200 mV.
Rich Intrusive Test
- The control module detects that the sensor is less than 730 mV for 12 seconds.
- The sensor is more than 730 mV.
• DTC P2A01 sets within 10 minutes when the above conditions are met.
All things being equal, the o2 sensor is probably bad. It didn't set a heater code, so the heater side of the o2 is most likely good. You need a scanner to read the 02 sensor and see what is happening, but it's a good bet to be just a bad sensor.
This is for:
DTC P2A01: HO2S Performance Bank 1 Sensor 2 , Bank 1 not bank 2! Post Cat. O2.
• The Engine Run Time parameter is more than 5 minutes.
• The ignition 1 Signal parameter is between 10-18 volts.
• The MAF sensor parameter is between 3-50 g/s.
• The Engine Speed parameter is between 500-5,000 RPM.
• The Vehicle Speed parameter is between 24-132 km/h (15-82 mph).
• The Fuel Level Sensor parameter is more than 10 percent.
• The Short Term FT parameter is between -4 and +4 percent.
• DTC P2A01 runs once per drive cycle when the above conditions are met for 1 second.
P2A01
• The control module detects that the sensor did not transition below 200 mV and above 730 mV during the passive test.
• One of the following tests fail:
Lean Intrusive Test
- The control module detects that the sensor is more than 200 mV for 12 seconds.
- The sensor is less than 200 mV.
Rich Intrusive Test
- The control module detects that the sensor is less than 730 mV for 12 seconds.
- The sensor is more than 730 mV.
• DTC P2A01 sets within 10 minutes when the above conditions are met.
All things being equal, the o2 sensor is probably bad. It didn't set a heater code, so the heater side of the o2 is most likely good. You need a scanner to read the 02 sensor and see what is happening, but it's a good bet to be just a bad sensor.
