P0121 code
#1
#2
P0121
TPS---(throttle position censer) fyi if the scanner didn't tell you. Could be drive motor or a broken wire, bad connection. It's a fly-by-wire system ,peddle sends a signal to the controller with tells a stepper motor how far and which way to move.Could be moisture in a connection. The motor is on the intake plentum RIGHT side as you stand in front.On the older cars I cleaned a reostat and checked them with a VOM but that was still a fisical linked system ,no luck here. Your scanner can read TPS position in % from idle. Check it w/o a code then with. No sense throwing parts at it. I do not know any specifics but mine runs about 9%@ idle. If you live in MPLS, MN the dealer will diagnose it FREE untill Jan 31, Just had mine done and was choked what they found. They estimated about $2654.00 plus futher testing @ $207.00/hr. I have nothing bad to say about them, there just to rich for my pocket book.
#3
#4
TB connection
If the problem or any others return use some DIE-ELECTRIC grease after cleaning them if you haven't done so, seems that even with all the rubber boots and tight connections it still happens from within the connector, probably using dissimular metals with electricity, like a ANODE rod in a water heater.
Thread
Thread Starter
Forum
Replies
Last Post
philwarner
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
25
06-26-2021 05:43 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)