Engine Controls - MIL ON/DTCs P2195/P0138/P0031
Bulletin
TSB3371
Issue Date
March 17, 2010
Market
Canada
Title
MIL "ON" DTC P2195, P0138, AND/OR P0031
Component
ENGINE ELECTRICAL
Models
'09 Corolla, Matrix
INTRODUCTION:
Some 2009 model year Corolla and Matrix vehicles may exhibit a MIL "ON" condition with one or more of the following Diagnostic Trouble Codes (DTCs):
- P2195 - Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1)
- P0138 - Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)
- P0031 - Oxygen (A/F) Sensor Heater Control Low (Bank 1 Sensor 1)
The Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition occurring. Use the following repair procedure to address this condition.
APPLICABILITY:
WARRANTY INFORMATION:
PARTS INFORMATION:
NOTE:
- The ECM (SAE term: Powertrain Control Module/PCM) should NOT be replaced as part of the repair procedure.
- Authorized Modification Labels may be ordered in packages of 25 from your facing PDC.
CALIBRATION INFORMATION:
REQUIRED TOOLS & EQUIPMENT:
REPAIR PROCEDURE:
1. Using ETAS Techstream, check for stored DTCs.
- If BOTH DTC P2195 and P0138 are set, proceed to step 2.
- If ONLY DTC P2195 is present, diagnose per the Repair Manual for P2195 (see below).
- If ONLY DTC P0138 is present, diagnose per the Repair Manual for P0138 (see below).
- If ONLY DTC P0031 is present, diagnose per the Repair Manual for P0031 (see below).
P2195 Diagnosis:
Does the Air Fuel Ratio Sensor have an open or short on the A1A+ or A1A-wires?
Refer to the Repair Manual within E-TAS / TIS library:
- Division: Toyota
- Model: Corolla
- Year: 2009
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2ZR-FE Engine Control: SFI System: P2195, P2196: Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1)
- YES - Repair the harness and reevaluate the Air Fuel Ratio Sensor operation.
Confirm the previous DTC(s) do NOT reset.
- NO - Proceed to step 2.
P0138 Diagnosis:
Inspect the Freeze Frame Data (FFD) values.
- If the AFS B1S1 voltage = 3.35 ~ 3.70V AND the O2S B1S2 = 0.70 ~ 0.90V, the A/F sensor is suspect. Proceed to step 2.
- If the O2S B1S2 voltage is more than 1.10V and/or the O2S Impedance is more than 300 ohms at operating temperature, the A/F sensor is NOT at fault and this TSB does NOT apply.
Refer to the Repair Manual within E-TAS / TIS library for O2 sensor and O2 sensor circuit diagnosis.
- Division: Toyota
- Model: Corolla
- Year: 2009
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2ZR-FE Engine Control: SFI System: P0136 P0139: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2)
P0031 Diagnosis:
Determine if the A/F sensor is at fault per the Repair Manual.
- Division: Toyota
- Model: Corolla
- Year: 2009
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2ZR-FE Engine Control: SFI System: P0031, P0032: Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)
- YES - Proceed to step 2.
- NO - This TSB does NOT apply. Refer to the Repair Manual for further diagnosis.
2. Replace the A/F sensor and proceed to step 3.
3. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Figure 1. Confirm if the ECM (PCM) calibration has been updated. If the calibration ID listed is NOT the latest ECM (PCM) calibration - go to step 4.
4. Flash reprogram the ECM (PCM).
NOTE:
- The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain battery voltage at 13.5 volts while flash reprogramming the vehicle.
- For details on how to use the GR8 Battery Diagnostic Station, refer to the GR8 Battery Diagnostic Station Instruction Manual located on ETAS/TIS library > Tools > tools and equipment > GR8 Battery Diagnostic Station Instruction Manual.
Follow the procedures outlined in TSB No.2758, "Techstream ECU Flash Reprogramming Procedure", and flash the ECM (PCM) with the NEW calibration file update.
5. Install the Authorized Modifications Label.
A. Using a permanent marker, enter the following information on the label:
- ECM part number [Refer to the Parts Information section for the CURRENT PART NUMBER]
- Calibration ID(s) [Refer to the Calibration Identification Chart for the NEW CALIBRATION ID]
- Dealer Code
- Repair Date
- Change Authority [This TSB number]
B. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1. The Authorized Modifications Label is available through the PDC, P/N 00451-00001-25.
6. Test drive the vehicle to confirm proper vehicle operation.
NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.