Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1999ECONOLINE E150 1/2 TON V6-4.2L VIN 2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSENGINE CONTROLS - BI-FUEL O2 SENSOR DIAGNOSTICS
1999 Ford Econoline E150 1/2 Ton V6-4.2L VIN 2
Engine Controls - Bi-Fuel O2 Sensor Diagnostics
1999 Ford Econoline E150 1/2 Ton V6-4.2L VIN 2SECTION Engine Controls - Bi-Fuel O2 Sensor Diagnostics
Article No.
03-6-6
03/31/03
DRIVEABILITY - BI-FUEL - OXYGEN SENSOR
DIAGNOSTICS - HIGH OXYGEN SENSOR VOLTAGE
READING
FORD:
1998-2000 CONTOUR
1998-1999 E SERIES
1998-2003 F-150
1999 F-250
ISSUE
Some Bi-Fuel vehicles may exhibit DTC's for high Oxygen Sensor voltage (P0132 and P0152). Current diagnostics may result in premature replacement of the Compuvalve.
ACTION
If an Oxygen Sensor code is set, the current diagnostics direct the Compuvalve to be replaced it no faults are detected when Pinpoint Test H is conducted. The modified repair action outlined below gives additional test procedures if nothing is detected from Pinpoint Test H.
SERVICE PROCEDURE
1. Prior to clearing any codes, to aid in diagnostics of intermittent failures, access and record the freeze frame data using the NGS Tester.
2. At step H4 of the pinpoint test, it Oxygen Sensor PIDS (H02S11 and H02521) are within specification (see table in Section H of PC/ED Manual), clear codes and road test the vehicle in alternative fuel using the freeze frame data (from above) to duplicate conditions that triggered the code. During the road test, monitor Oxygen Sensor PIDs for both banks in both the PCM and the AFCM.
NOTE
A SECOND TECHNICIAN SHOULD MONITOR THE PIDS WHILE THE OTHER DRIVES. IF THE CODE/CONCERN CANNOT BE DUPLICATED, REFER TO PINPOINT TEST Z OF THE BASE VEHICLE PC/ED.
3. If the concern is duplicated, and if voltage is outside of specifications in both the AFCM and the PCM, the fault is in the Heated Exhaust Gas Oxygen (HEGO) sensor circuit. Refer to base vehicle diagnostics.
4. If the voltage is outside of specifications in the AFCM only, replace the Compuvalve.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 206000, 490000, 698298
Disclaimer
03-6-6
03/31/03
DRIVEABILITY - BI-FUEL - OXYGEN SENSOR
DIAGNOSTICS - HIGH OXYGEN SENSOR VOLTAGE
READING
FORD:
1998-2000 CONTOUR
1998-1999 E SERIES
1998-2003 F-150
1999 F-250
ISSUE
Some Bi-Fuel vehicles may exhibit DTC's for high Oxygen Sensor voltage (P0132 and P0152). Current diagnostics may result in premature replacement of the Compuvalve.
ACTION
If an Oxygen Sensor code is set, the current diagnostics direct the Compuvalve to be replaced it no faults are detected when Pinpoint Test H is conducted. The modified repair action outlined below gives additional test procedures if nothing is detected from Pinpoint Test H.
SERVICE PROCEDURE
1. Prior to clearing any codes, to aid in diagnostics of intermittent failures, access and record the freeze frame data using the NGS Tester.
2. At step H4 of the pinpoint test, it Oxygen Sensor PIDS (H02S11 and H02521) are within specification (see table in Section H of PC/ED Manual), clear codes and road test the vehicle in alternative fuel using the freeze frame data (from above) to duplicate conditions that triggered the code. During the road test, monitor Oxygen Sensor PIDs for both banks in both the PCM and the AFCM.
NOTE
A SECOND TECHNICIAN SHOULD MONITOR THE PIDS WHILE THE OTHER DRIVES. IF THE CODE/CONCERN CANNOT BE DUPLICATED, REFER TO PINPOINT TEST Z OF THE BASE VEHICLE PC/ED.
3. If the concern is duplicated, and if voltage is outside of specifications in both the AFCM and the PCM, the fault is in the Heated Exhaust Gas Oxygen (HEGO) sensor circuit. Refer to base vehicle diagnostics.
4. If the voltage is outside of specifications in the AFCM only, replace the Compuvalve.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 206000, 490000, 698298
Disclaimer
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.