Vibe FWD L4-1.8L (2010)
Engine Control Module: All Technical Service Bulletins
Engine Controls - MIL ON/DTC's P0031/P0138/P2195
TECHNICAL
Bulletin No.: 11-06-04-003
Date: February 01, 2011
Subject: Malfunction Indicator Lamp (MIL) Illuminated, DTC P0031, P0138 and/or P2195 Set (Diagnose Heated Oxygen Sensors (HO2S), Reprogram
Powertrain Control Module (PCM))
Models:
2009-2010 Pontiac Vibe
Equipped with 1.8L Engine RPO LAY and Transmission RPO MVB or MVE
Attention:
Before proceeding with the reprogramming procedure in this bulletin, the Vibe Programming Application MUST be downloaded and installed on the
PC. Refer to Corporate Bulletin Number 09-06-04-006A.
Condition
Some customers may comment that the malfunction indicator lamp (MIL) is illuminated.
A scan tool may reveal the following DTCs set as Current or in History:
-
DTC P0031: HO2S Heater Control Circuit Low Voltage Sensor 1
-
DTC P0138: HO2S Circuit High Voltage Sensor 2
-
DTC P2195: Heated Oxygen Sensor (HO2S) Signal Biased Lean Sensor 1
Cause
This condition may be caused by the HO2S Sensor 1 and/or a calibration anomaly in the software of the PCM.
Correction
Perform the Diagnostic System Check - Vehicle, in order to determine the DTC(s) that is set.
Bulletin Starting Point for DTC P0031: HO2S Heater Control Circuit Low Voltage Sensor 1
DO NOT replace the powertrain control module (PCM) for this condition.
1. Diagnose and determine if the HO2S Sensor 1 is at fault. Refer to DTC P0031, P0032, P0037 or P0038 in SI.
‹› If diagnosis determines that the HO2S Sensor 1 is at fault, replace the sensor. Refer to Heated Oxygen Sensor Replacement - Sensor 1 in SI.
Proceed to Step 2.
‹› If diagnosis determines that the HO2S Sensor 1 is not at fault, then this bulletin DOES NOT apply.
2. Reprogram the PCM. Refer to the section for Reprogramming the PCM, in this bulletin.
Bulletin Starting Point for DTC P0138: HO2S Circuit High Voltage Sensor 2
DO NOT replace the powertrain control module (PCM) for this condition.
1. Observe the Freeze Frame/Failure Records data for the HO2S Sensor 1 and HO2S Sensor 2.
‹› If the HO2S Sensor 1 voltage is between 3.35V and 3.70V AND the HO2S Sensor 2 voltage is between 0.70V and 0.90V, proceed to Step 2.
‹› If the HO2S Sensor 2 voltage is more than 1.10V and/or the Sensor Impedance is more than 300ohm at operating temperature, then HO2S
Sensor 1 is not at fault and this bulletin does not apply.
2. Replace the HO2S Sensor 1. Refer to Heated Oxygen Sensor Replacement - Sensor 1 in SI.
Proceed to Step 3.
3. Reprogram the PCM. Refer to the section for Reprogramming the PCM, in this bulletin.