Throwing some codes.
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Instructor
Joined: Apr 2009
Posts: 198
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From: San Marcos TX
Throwing some codes.
Reset all the DIC codes last week and drove around for a week and had these codes come back.
PCM - P0135 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 1 Sensor 1
TCS - C1281 Steering Sensor Uncorrelated Malfunction
TCS - C1286 Steering Sensor Bias Malfunction
BCM - B2721 PASS-Key Detection Circuit
IPC - B0521 Tachometer Signal Circuit Malfunction
HVAC - B0441 Left Actuator Out of Range
RFA - U1096 Loss of Communications with IPC
RFA - U1064 Loss of Communications with BCM
RFA - U1016 Loss of Communication with PCM
So I need a new O2 sensor and I think the ignition cylinder may be a little worn causing the PASS code. The A/C blows ice cold, so i'm confused by the HVAC code. As far as the Steering Sensor and the other codes... could some of these be caused by the ground issues that seem to be common? New Optima Red top, so it's not the battery.
The car runs flawless and shows no signs or symptoms of anything being wrong.
PCM - P0135 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 1 Sensor 1
TCS - C1281 Steering Sensor Uncorrelated Malfunction
TCS - C1286 Steering Sensor Bias Malfunction
BCM - B2721 PASS-Key Detection Circuit
IPC - B0521 Tachometer Signal Circuit Malfunction
HVAC - B0441 Left Actuator Out of Range
RFA - U1096 Loss of Communications with IPC
RFA - U1064 Loss of Communications with BCM
RFA - U1016 Loss of Communication with PCM
So I need a new O2 sensor and I think the ignition cylinder may be a little worn causing the PASS code. The A/C blows ice cold, so i'm confused by the HVAC code. As far as the Steering Sensor and the other codes... could some of these be caused by the ground issues that seem to be common? New Optima Red top, so it's not the battery.
The car runs flawless and shows no signs or symptoms of anything being wrong.
Last edited by dodriven; Jul 14, 2009 at 02:52 PM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The LOSS OF COMMS codes can be caused by a number of things. The first thing that I would check is if you have a FULLY CHARGED & Properly Operaating battery. Take it out, take it to Autozone and have it fully tested. If its bad replace it. If its good, clean the battery terminals and torque it back in to the required 11 ft/lbs Tq.
Clean all the under hood chassis grounds. look at my IMPORTANT ELECTRICAL INFORMATION (LONG) stickey post and look at the ground cleaning post.
What voltages are you seeing on the dash Voltmeter during normal operation??
Once you accomplish the above procedures, recheck the codes.
If that doesnt fix it, let me know. I have a few more ideas.
Bill
Clean all the under hood chassis grounds. look at my IMPORTANT ELECTRICAL INFORMATION (LONG) stickey post and look at the ground cleaning post.
What voltages are you seeing on the dash Voltmeter during normal operation??
Once you accomplish the above procedures, recheck the codes.
If that doesnt fix it, let me know. I have a few more ideas.
Bill
Thread Starter
Instructor
Joined: Apr 2009
Posts: 198
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From: San Marcos TX
New Red top, battery is good. Voltmeter is steady at 13.5 volts cruising down the road.
I will clean the grounds, but from a quick glance they are clean and in good shape, no corrosion or anything.
I will clean the grounds, but from a quick glance they are clean and in good shape, no corrosion or anything.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,396
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Thread Starter
Instructor
Joined: Apr 2009
Posts: 198
Likes: 0
From: San Marcos TX
Followup...
The grounds didn't even look dirty, but I took them apart/off, cleaned them off and then scuffed them up with a scotchbrite (The ground and the contact spot on the frame).
Results...
No More Codes!!
The O2 and the PASS key codes are still there, but I knew those weren't ground related.
The grounds didn't even look dirty, but I took them apart/off, cleaned them off and then scuffed them up with a scotchbrite (The ground and the contact spot on the frame).
Results...
No More Codes!!
The O2 and the PASS key codes are still there, but I knew those weren't ground related.
