Fleetwood Brougham V8-307 5.0L (1989)
Throttle Position Sensor: All Technical Service Bulletins
Intermittent MIL ON, DTC 34 on Long Drives or Upgrades
Bulletin No.
T-90-66
File in Group
6E
Number
80
Corp. Ref. No.
016512
Date
May, 1990
SUBJECT:
INTERMITTENT CHECK ENGINE LIGHT CODE 34 SETS ON LONG DRIVES OR UPGRADES
MODELS AFFECTED:
1986-1990 BROUGHAMS EQUFPPED WITH 5.0L ENGINE
Some 1986-1990 Broughams may experience an intermittent Check Engine Light (CEL) with a code 34 on long drives or upgrades.
This condition may be due to low TPS output voltage. If the TPS output voltage is lower than 2.0 volts during the condition, the code will set.
To diagnose and repair this condition use the Tech 1 to monitor the TPS output. With ignition on and engine off, monitor the TPS voltage at WOT. If it
is less than 2.0 volts, replace the TPS with P/N 17078448.
Parts are currently available from GMSPO.
