What does this code mean?
What does this code mean?
Was driving my car today and I hit a slight bump and my car went into what I think was limp mode. I don't know if the bump had anything to do with it but I coasted into a parking lot. The car was still running but reved very slow. I turned it off and restarted it and it was back to normal except the engine light was on. I hooked up a code puller and found this code. I reset it and everything is back to normal now. Any idea if this is something I should worry about? Thanks in advance....
Do any of you guys know what the function of the TPS is? For awhile now I have been having what I have thought is a boost leak (only been boosting to about 5-7psi). Since I reset this code today my car seems to have the power it used to have but only say 50% of the time. Lately if I floor it from say 20mph in 2nd gear I experience no wheelspin as the boost kicks in. I was just driving and did a roll from 20mph and it hit 10psi and was all wheelspin through 2nd gear. I know that this is not belt slip and I have bought a very short belt and it is very tight. Just wondering if my throttle plate is not opening all the way (since our cars are throttle by wire) or something and causing this inconsistent power in my car as I pulled a TPS code today.
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most TP (throttle position) sensor sit on the throttle body opposite of the throttle cable and relays the position of the throttle plate to the ECM.........however 350z's have what they call electronic throttle bodies meaning that the throttle plate opens via a servo and not a throttle cable..........the TP sensor on your Z is located on the gas pedal and it judges how much to open the throttle plate based on what position the pedal is in...................a new sensor will cost about $153.00 at the dealership and comes with the whole gas pedal assembly
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Originally Posted by nomyth46
most TP (throttle position) sensor sit on the throttle body opposite of the throttle cable and relays the position of the throttle plate to the ECM.........however 350z's have what they call electronic throttle bodies meaning that the throttle plate opens via a servo and not a throttle cable..........the TP sensor on your Z is located on the gas pedal and it judges how much to open the throttle plate based on what position the pedal is in...................a new sensor will cost about $153.00 at the dealership and comes with the whole gas pedal assembly
Hitting that bump may have jarred the throttle plate for a instant causing the sensor to misread and throw the code.
The throttle body plate is driven by a servo motor. Its position is monitored by the Throttle Position Sensor. The TPS actually contains two sensors. If for some reason, the two signals don't register properly, then the ECU will throw the code.
Since it seems to be okay after clearing the code, there's probably nothing to worry about. If the TPS was broke or it was out of calibration, you'd continue to get the code until fixed or re-calibrated.
Here's a sample of the calibrations procedures....
https://my350z.com/forum/showthread....26&postcount=3
The throttle body plate is driven by a servo motor. Its position is monitored by the Throttle Position Sensor. The TPS actually contains two sensors. If for some reason, the two signals don't register properly, then the ECU will throw the code.
Since it seems to be okay after clearing the code, there's probably nothing to worry about. If the TPS was broke or it was out of calibration, you'd continue to get the code until fixed or re-calibrated.
Here's a sample of the calibrations procedures....
https://my350z.com/forum/showthread....26&postcount=3
Originally Posted by nomyth46
most TP (throttle position) sensor sit on the throttle body opposite of the throttle cable and relays the position of the throttle plate to the ECM.........however 350z's have what they call electronic throttle bodies meaning that the throttle plate opens via a servo and not a throttle cable..........the TP sensor on your Z is located on the gas pedal and it judges how much to open the throttle plate based on what position the pedal is in...................a new sensor will cost about $153.00 at the dealership and comes with the whole gas pedal assembly
Last edited by DavesZ#3; Jul 16, 2008 at 03:14 AM.
Originally Posted by DavesZ#3
Hitting that bump may have jarred the throttle plate for a instant causing the sensor to misread and throw the code.
The throttle body plate is driven by a servo motor. Its position is monitored by the Throttle Position Sensor. The TPS actually contains two sensors. If for some reason, the two signals don't register properly, then the ECU will throw the code.
Since it seems to be okay after clearing the code, there's probably nothing to worry about. If the TPS was broke or it was out of calibration, you'd continue to get the code until fixed or re-calibrated.
Here's a sample of the calibrations procedures....
https://my350z.com/forum/showthread....26&postcount=3
The throttle body plate is driven by a servo motor. Its position is monitored by the Throttle Position Sensor. The TPS actually contains two sensors. If for some reason, the two signals don't register properly, then the ECU will throw the code.
Since it seems to be okay after clearing the code, there's probably nothing to worry about. If the TPS was broke or it was out of calibration, you'd continue to get the code until fixed or re-calibrated.
Here's a sample of the calibrations procedures....
https://my350z.com/forum/showthread....26&postcount=3
The Z has two APP sensors on the gas pedal and two TP sensors on the throttle body. They are NOT the same and do NOT do the same thing.
The APP sensor on the pedal tells the ECU how much throttle the driver is requesting. This does NOT correlate 100% with throttle position. The ECU analyzes the APP signal and then uses internal maps to move the throttle plate to where it is needed to satisfy the drivers request. The ECU then monitors the TPS signal to verify that the throttle is actually where it is supposed to be.
To implement a safe DBW system it is necesarry to have redundent signals at every point in the system - from the very beginning at the APP sensor to the very end at the TPS.
On another note, coming back from the Tail of the Dragon my buddy had this exact same code. We messed with this throttle body and cleaned it and made sure it was working properly only to find out his fuel pump had died! I'm not sure how a dead fuel pump trips a TPS code, but in his case it did. It may be possible that when you hit the bump your fuel pump sucked in a bit of air or something like that.
The APP sensor on the pedal tells the ECU how much throttle the driver is requesting. This does NOT correlate 100% with throttle position. The ECU analyzes the APP signal and then uses internal maps to move the throttle plate to where it is needed to satisfy the drivers request. The ECU then monitors the TPS signal to verify that the throttle is actually where it is supposed to be.
To implement a safe DBW system it is necesarry to have redundent signals at every point in the system - from the very beginning at the APP sensor to the very end at the TPS.
On another note, coming back from the Tail of the Dragon my buddy had this exact same code. We messed with this throttle body and cleaned it and made sure it was working properly only to find out his fuel pump had died! I'm not sure how a dead fuel pump trips a TPS code, but in his case it did. It may be possible that when you hit the bump your fuel pump sucked in a bit of air or something like that.
Reviving this thread from the dead... and I'm not even FI!!!! After a day of auto-x, I got into my car and started the motor to head home. Got the SES light and limp mode, super slow acceleration up to 1500 rpm. Just like many of you, I then shut her down, restarted, and she drove normal again.
I got this same P2135 code using the Actron reader. I selected the "view freeze data" option after reading the code. The data is below (never seen this posted or discussed before). Some of you who simply deleted the code, did it ever come back? Does anyone know what the data means?
DTC that caused freeze frame: P2135
Throttle Position: 7.4%
Engine RPM: 825 RPM
Load Value: 23.1%
Coolant Temp: 186 deg F
Short Term Fuel Trim1: 12.5%
Longer Term Fuel Trim1: 7.8%
Short Term Fuel Trim2: 12.5%
Long Term Fuel Trim2: 4.6%
Short Term Fuel Trim3: -100.6%
Long Term Fuel Trim3: -100.6%
Long Term Fuel Trim4: -100.6%
Short Term Fuel Trim4: -100.6%
Vehicle Speed 0 mph
Fuel System 1 CLSD
Fuel System 2 CLSD
I got this same P2135 code using the Actron reader. I selected the "view freeze data" option after reading the code. The data is below (never seen this posted or discussed before). Some of you who simply deleted the code, did it ever come back? Does anyone know what the data means?
DTC that caused freeze frame: P2135
Throttle Position: 7.4%
Engine RPM: 825 RPM
Load Value: 23.1%
Coolant Temp: 186 deg F
Short Term Fuel Trim1: 12.5%
Longer Term Fuel Trim1: 7.8%
Short Term Fuel Trim2: 12.5%
Long Term Fuel Trim2: 4.6%
Short Term Fuel Trim3: -100.6%
Long Term Fuel Trim3: -100.6%
Long Term Fuel Trim4: -100.6%
Short Term Fuel Trim4: -100.6%
Vehicle Speed 0 mph
Fuel System 1 CLSD
Fuel System 2 CLSD
Last edited by mavtais; Mar 24, 2010 at 02:06 PM. Reason: Highlighted the freeze data that did not match
It has happened to me three times in 3 years. 2 times I turned the car off and re-started and it was fine. The 3rd time I had to disconnect the neg. batt cable and re-start and it was fine. It's not a huge deal as it only happens like once a year but I really don't know what causes it or how to prevent it from happening.
^Thanks for the reply.
After reading the service manual, and seeing our symptoms (only happens once in a long while), I'm guessing that the throttle valve gets stuck open when you shut the engine down. It does not fully close, so when you start it up, the voltage the ECM receives from the throttle and the accelerator pedal do not match (see my data in post 17 above); therefore throwing the code and going into safe mode.
Perhaps a simple throttle body cleaning is all that is needed to ensure the throttle valve returns to fully closed.
Tell me what you think.
After reading the service manual, and seeing our symptoms (only happens once in a long while), I'm guessing that the throttle valve gets stuck open when you shut the engine down. It does not fully close, so when you start it up, the voltage the ECM receives from the throttle and the accelerator pedal do not match (see my data in post 17 above); therefore throwing the code and going into safe mode.
Perhaps a simple throttle body cleaning is all that is needed to ensure the throttle valve returns to fully closed.
Tell me what you think.
Last edited by mavtais; Mar 24, 2010 at 02:07 PM.
So much to have fun with here, but I will refrain.