Pressure Fault Menu
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1990 Pontiac Bonneville, 1990 Oldsmobile Ninety-Eight, 1990 Oldsmobile Eighty-Eight, 1990 Cadillac Fleetwood, and 1990 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
CHART A-14, CODES 51-54 & 71-74 PRESSURE REDUCTION FAULT
| DTCs | Perform These Tests |
|---|---|
| 51 and/or 71 | Go to chart A-9. If no trouble is found while performing test on chart A-9. Do Not go to test F, instead go to solenoid valve test G. |
| 51 and/or 71 | Perform solenoid Valve test for LF Valve |
| 51 and/or 71 | If no trouble is found, replace EBCM. |
| 52 and/or 72 | Go to chart A-10. If no trouble is found while performing test on chart A-10. Do Not go to test F, instead go to solenoid valve test G. |
| 52 and/or 72 | Perform solenoid Valve test for RF Valve |
| 52 and/or 72 | If no trouble is found, replace EBCM. |
| 53 and/or 73 | Go to chart A-11. If no trouble is found while performing test on chart A-11. Do Not go to test F, instead go to solenoid valve test G. |
| 53 and/or 73 | Perform solenoid Valve test for Rear Valve. |
| 53 and/or 73 | If no trouble is found, replace EBCM. |
| 54 and/or 74 | Go to chart A-12. If no trouble is found while performing test on chart A-12. Do Not go to test F, instead go to solenoid valve test G. |
| 54 and/or 74 | Perform solenoid Valve test for Rear Valve. |
| 54 and/or 74 | If no trouble is found, replace EBCM. |