Canada - Engine Control - MIL ON DTC P2237 And Or P2238

Bulletin
TSB3045

Issue Date
September 19, 2008

Market
Canada

Title
M.I.L. "ON" DTC P2237 and/or P2238

Component
Engine Electrical

Models
2008 Camry HV

INTRODUCTION:

Some 2008 Camry HV vehicles may exhibit a M.I.L. "ON" condition with one of the following Diagnostic Trouble Codes (DTCs):
- P2238 - Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 1 Sensor 1)
- P2237 - Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)

An improved engine wiring harness has been developed to address this condition. Use the following repair procedure to diagnose and repair customer complaint vehicles.





APPLICABLE VEHICLES:






PRODUCTION CHANGE INFORMATION:






WARRANTY INFORMATION:











PARTS INFORMATION:






REQUIRED SSTS:

NOTE:
- Please contact your zone Area Parts & Service Managers to order additional Techstream units.
- Additional SSTs may be ordered by calling SPX/OTC at 1-800-933-8335.

REPAIR PROCEDURES:

1. Using Techstream, check for stored DTCs.
2. Verify DTC(s) P2238 and/or P2237 are present.

NOTE
If other A/F sensor DTCs are present along with any of the DTCs listed above, this TSB does NOT apply. Follow Repair Manual procedure to diagnose those DTCs.

3. Follow Repair Manual procedure to inspect the A/F sensor heater and Engine Room Junction Block (A/F Relay).


Refer to the Repair Manual within E-TAS / TIS library:
- Division: Toyota
- Model: Camry HV
- Year: 2008
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: SFI System: P2237: Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)

4. If the A/F sensor heater and Engine Room Junction Block (A/F Relay) are within Repair Manual specifications, replace the engine wire harness.

NOTE
It is necessary to remove the intake manifold and inverter assembly to access the engine wire harness.


For inverter assembly removal:
- Division: Toyota
- Model: Camry HV
- Year: 2008
- Service Category: Engine/Hybrid System
- Section: Hybrid/Battery Control System
- Keyword: P311 Hybrid Vehicle Control: Inverter with Converter: Removal


For intake manifold removal:
- Division: Toyota
- Model: Camry HV
- Year: 2008
- Service Category: Engine/Hybrid System
- Section: Engine Mechanical
- Keyword: 2AZ-FXE Engine Mechanical: Engine Assembly: Removal


For inverter assembly installation:
- Division: Toyota
- Model: Camry HV
- Year: 2008
- Service Category: Engine/Hybrid System
- Section: Hybrid/Battery Control System
- Keyword: P311 Hybrid Vehicle Control: Inverter with Converter: Installation


For intake manifold installation:
- Division: Toyota
- Model: Camry HV
- Year: 2008
- Service Category: Engine/Hybrid System
- Section: Engine Mechanical
- Keyword: 2AZ-FXE Engine Mechanical: Engine Assembly: Installation

5. After replacing the engine harness, clear DTCs and verify that no DTCs reset. Then warm vehicle to operating temperature and test drive to verify repair.

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.