Had P0135 Changed suggested Sensor. Now Have P 2252

ONLOOKER

MEMBER
2005 HONDA CIVIC
149,000 MILES

Daughter told me Eng light on. I go and get myself a Code Reader. I was getting P0135. Change Sensor as recommended. Now I have a P2252 code. Nothing really to be found on this codes trouble shooting sequence online. Except the "Forum experts" claiming it's because used an aftermarket part not OEM. If they are actually correct fine. I will invest the ridiculous OEM mark up priced Sensor. But would rather a bit more reliable data before just throwing money at this problem. Thank you.

5 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Check the power to the oxygen sensor could be shorted to ground causing to throw the P2252-when you replace the sensor did you clear the computer

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Friday, February 17th, 2012 AT 11:54 AM

ONLOOKER

MEMBER
3 POSTS

Yes I cleared computer before starting car with new sensor. Best way to ck for pwr? Thank you.

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Friday, February 17th, 2012 AT 12:04 PM

KHLOW2008

MECHANIC
41,814 POSTS

The code could be due to a short in the wiring, a faulty sensor or the PCM requires updating.

After market sensors can throw the code but before replacing the sensor again, ensure the wires are connected correctly and secure.

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Friday, February 17th, 2012 AT 12:08 PM

ONLOOKER

MEMBER
3 POSTS

What I ment to ask was. It was a pre wired Sensor. How do I then ensure that the Prewired plug is wired in the proper sequence? I will assume the only way to update PCM is via a cert Mech? Thanks both answer very helpful in getting me sent in the right direction.

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Friday, February 17th, 2012 AT 12:20 PM

KHLOW2008

MECHANIC
41,814 POSTS

Updating the PCM can only be done by the dealer only as the software is not available elsewhere. If the sensor is prewired, the wiring should be correct.

DTC DTC P2252: A/F SENSOR (SENSOR 1) AFS-TERMINAL LOW VOLTAGE

1. Reset the ECM/PCM.

2. Start the engine. Is DTC P2252 indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Check for poor
connections or loose terminals at the A/F sensor (Sensor 1) and at the ECM/PCM

3. Turn the ignition switch OFF.

4. Disconnect the A/F sensor (Sensor 1) 4P connector, and ECM/PCM connector A (31P).

5. Check for continuity between ECM/PCM connector terminal A16 and body ground.

Is there continuity?

YES - Repair short in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A16).

NO - Go to step 6.

6. Substitute a known-good A/F sensor (Sensor 1) and recheck.
Is DTC P2252 indicated?

YES - Update the ECM/PCM if it does not have the latest software, or
substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the
original ECM/PCM.

NO - Replace the A/F sensor (Sensor 1).