'00 Vanden Plas - Code 1631
#1
'00 Vanden Plas - Code 1631
To all - first of all to those that answered my Vacuum Leak Question yesterday - thank you - however, I did not have a chance yet to do what you all recommended. In the meantime, I got a new issue, the car has been driving great and I took it out at lunch yesterday - no issues. When I went to go home, it started up and ran rough and the dashboard was like Christmas lights - the big issue is I am now getting the Engine Failsafe Mode.
When I got it home, I fully charged the battery which is about 1.5 years old but it was showing good when I started the charge. I let it charge over night and started it up and still the same issue.
So I am not sure what kicked it into getting this code and message. Below is a picture from my reader.
Any help or suggestions is apprreciated.
When I got it home, I fully charged the battery which is about 1.5 years old but it was showing good when I started the charge. I let it charge over night and started it up and still the same issue.
So I am not sure what kicked it into getting this code and message. Below is a picture from my reader.
Any help or suggestions is apprreciated.
#2
Some info for you.
P1631
Throttle motor power relay coil
activation circuit failure
Default Action
When RED MIL is activated
(DTC logged; first trip), ECM:
– Switches off throttle motor
(via relay)
– Initiates throttle “limp home”
mode: engine speed controlled to
between 1000-1250 rpm by fuel
cutoff to cylinders
– Inhibits idle speed control
– Inhibits cruise control
– Inhibits traction
Possible Causes
Throttle motor relay coil to ECM circuit
open circuit, short circuit to ground or
short circuit to B+ voltage
ECM failure
P1631
Throttle motor power relay coil
activation circuit failure
Default Action
When RED MIL is activated
(DTC logged; first trip), ECM:
– Switches off throttle motor
(via relay)
– Initiates throttle “limp home”
mode: engine speed controlled to
between 1000-1250 rpm by fuel
cutoff to cylinders
– Inhibits idle speed control
– Inhibits cruise control
– Inhibits traction
Possible Causes
Throttle motor relay coil to ECM circuit
open circuit, short circuit to ground or
short circuit to B+ voltage
ECM failure
The following users liked this post:
Highhorse (06-18-2022)
#3
Some info for you.
P1631
Throttle motor power relay coil
activation circuit failure
Default Action
When RED MIL is activated
(DTC logged; first trip), ECM:
– Switches off throttle motor
(via relay)
– Initiates throttle “limp home”
mode: engine speed controlled to
between 1000-1250 rpm by fuel
cutoff to cylinders
– Inhibits idle speed control
– Inhibits cruise control
– Inhibits traction
Possible Causes
Throttle motor relay coil to ECM circuit
open circuit, short circuit to ground or
short circuit to B+ voltage
ECM failure
P1631
Throttle motor power relay coil
activation circuit failure
Default Action
When RED MIL is activated
(DTC logged; first trip), ECM:
– Switches off throttle motor
(via relay)
– Initiates throttle “limp home”
mode: engine speed controlled to
between 1000-1250 rpm by fuel
cutoff to cylinders
– Inhibits idle speed control
– Inhibits cruise control
– Inhibits traction
Possible Causes
Throttle motor relay coil to ECM circuit
open circuit, short circuit to ground or
short circuit to B+ voltage
ECM failure
I keep a battery disconnect on all my cars since that time....these cars are so sensitive to electrical problems it's just easier than keeping a 10mm wrench in the trunk!
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