MIL ON, DTC 53 (EGR Control Error) Set
Number 86-6(Gasoline)-63 Date 9/86Subject: CODE 53 - EGR CONTROL ERROR
1986 PARISIENNE MODELS WITH 5.0L V8 ENGINES (LG4 VIN CODE H)
In most cases, normal diagnostic and repair will correct customer complaints of "Service Engine Soon Light" Code 53 (EGR Control Error). If the diagnostics shown in your 1986 Service Manual (Section 6E1) shows the problem to be "No Trouble Found", it will be necessary to change the PROM in the ECM. Below is a listing of new PROM numbers released to correct this condition.
FEDERAL EMISSION:
APPLICATION PART NUMBER
Sedans 1228284
Wagons With GU2 (2.73) Axle 1228285
Wagons With GU4 (3.08) Axle 1228286
CALIFORNIA EMISSION:
PART NUMBER APPLICATION
Sedans 1228287
Wagons With GU2 (2.73) Axles 1228288
Wagons With GU4 (3.08) Axles 1228289
Use applicable labor time and operation numbers.