MIL ON DTC's P0130 & P0150 Set
No: 17/02/97/NASRef: TIB 17/01/96
Issue: 1
Date: 10/06/97
PRIDE V 1-18
Oxygen Sensor Period Fault Code P0130/P0150
AFFECTED VEHICLE RANGE:
RANGE ROVER (LP) 1996-1997
SITUATION:
MIL ILLUMINATION, CODE P0130/P0150
NOTE:
This information supersedes information given in Operation Pride article 1-12.
In some cases an Oxygen Sensor Period fault can be set and the MIL can be illuminated. In order to properly diagnose this fault the concept of an oxygen sensor period must be understood. The oxygen sensor period is defined as the time involved for the oxygen sensor signal to go from full rich to full lean and back to full rich again (Figure 1). GEMS will flag a fault code if the time involved for a full period is too long. GEMS uses a counter to allow for some abnormal switching of the Oxygen Sensor. Too many bad counts will flag a code. A fault may be set by a poorly switching sensor or, in some cases, a unique driving style.
RESOLUTION:
REPLACE GEMS PROM
Use the procedure detailed below to test the performance of the Oxygen Sensor. If the Oxygen Sensor proves to be functional, this problem can be resolved by a software change to the PROM of the GEMS ECM.
NOTE:
The repairs outlined in this TIB are to be performed to resolve customer complaint of the symptoms described.
PARTS INFORMATION:
PRM9636 .................. PROM (1996)
PRM9639 .................. PROM (1997)
LRNASTATK ............... Anti-Static Mat
NOTE:
PROM sets will only be released with the approval of the GEMS Helpline.
WARRANTY CLAIMS:
19.26.26 Time: 1.25 hrs.
TestBook access codes, Uniscope analysis, DTCR and
Drive Cycle 'C'
19.22.89.29 Time: 0.25 hrs.
Snap Throttle Test
18.30.89.26 Time: 0.50 hrs.
Replace PROM Set
COMP CODE: 7G1A
Normal warranty policy and procedures apply
REPAIR PROCEDURE:
1. Hook up TestBook and follow instructions.
2. Complete DTCR recording all freeze-frame data.
3. Monitor HO2S voltages and heater voltages. If any are out of specification, repair and retest.
4. Perform the oxygen sensor snap throttle test as outlined in TIB 17/01/96.
5. If the snap throttle test shows the sensor transition time, both rich to lean and lean to rich, to be good, DO NOT REPLACE THE SENSOR; look at the service history for other instances of this DTCR.
6. FAX DTCR to GEMS Helpline to get authorization to replace PROM set.
7. Reset engine adaptation and IACV to 20-25 steps.