hey guys,

p1193 - manufactor. controlled fuel and air mettering

p0121 - throttle/pedal senor A circuit range performance

I just replaced the TPS, so is it a bad sensor or is the p1193 triggering it to come back on? Is the p1193 a mass air flow sensor? i cleaned it out about a month ago.

Would really appreciate some input on this

thanks,
Reggie

 

year model???
for 96-97 the 1193 code is the downstream lambda heater circuit
for 121-Intake air or exhaust restricted
Extreme high altitude operation
Intermittent / incorrect , but undetected; TPS,
engine speed, IATS, MAFS or IACV signals.
So it means the tps position may be wrong compared to the temperature the mass air or an idle valve- it sounds like a catch all.
No offence, but I would check the plugs you took off replacing the tps and issc

 

its a 97 4.0

So 1193 is a 02 sensor?

After getting off the highway, the car sometimes have an idle around 1500, then will slowly go back to normal as i cruise around at city speeds. This problem is caused by the 0121 correct?

thanks for the reply

 

Is your car a US model or ROW?
The codes I quoted are correct for a '97.
The problem could be any number of things from those codes. You say you put in a new TPS. I assume you did not do the setup on it, since it takes the dealer type software. What is the max and min voltages reported for the TPS?
Note that the code says Lambda HEATER circuit. That might or might not be the lambda itself. If that code returns after reset, I would go after it before I worried about the P121 code, since there is almost nothing else that should affect the heater circuit except ecu output, wiring, connectors or O2 sensor.
Good luck!

 

its a us car.

You say setup on the tps...what do i need to do for a setup on it?

You seem to know quite a lot what your talking about. Excuse me if i come across ignorant, but what is the lambda?

 

Sorry- I was not trying to "jargon" you. The oxygen sensor is also called a "lambda" sensor. There are two setups done on a XJ6 engine with dealer software. One is the "Lambda resequence" which assures the left and right sensors are connected to the proper sockets, since they are not marked left and right. Another setup sets the zero and span of the TPS since ther are no slots on the mounting as in other cars.