Code p1133 My car keeps coming up with the code p1133 when my dad puts it on the computer. The first time the car is started during the day it runs rough and the engine light is on. When the code comes up it says manufacturer malfunction air and fuel

But here are ALL of the results - so you can take the action that is relevant in your case.



DTC P1133 is most likely caused by one of the following:

* Fuel pressure - The system will go rich if fuel pressure is to high. The PCM can compensate for some increase, however, if it gets too high, a DTC P0132 will be set. Refer to Fuel System Diagnosis 2.4L, Fuel System Diagnosis 2.2L.
* Leaking injector - A leaking or malfunctioning injector can cause the system to go rich.
* MAP sensor - An output that causes the PCM to sense a higher than normal manifold pressure (low vacuum) can cause the system to go rich. Disconnecting the MAP sensor will allow the PCM to set a fixed value for the MAP sensor. Substitute a different MAP sensor if the rich condition is gone while the sensor is disconnected.
* Pressure regulator - Check for a leaking fuel pressure regulator diaphragm by checking for the presence of liquid fuel in the vacuum line to the regulator.
* TP sensor - An intermittent TP sensor output will cause the system to go rich due to a false indication of the engine accelerating.
* O2S 1 contamination - Inspect O2S 1 for silicone contamination from fuel or use of improper RTV sealant. The sensor may have a white powdery coating and result in a high but false voltage signal (rich exhaust indication). The PCM will then reduce the amount of fuel delivered to the engine causing a severe surge or driveability problem.
But here are ALL of the results - so you can take the action that is relevant in your case.

DTC P1133 is most likely caused by one of the following:

* Fuel pressure - The system will go rich if fuel pressure is to high. The PCM can compensate for some increase, however, if it gets too high, a DTC P0132 will be set. Refer to Fuel System Diagnosis 2.4L, Fuel System Diagnosis 2.2L.
* Leaking injector - A leaking or malfunctioning injector can cause the system to go rich.
* MAP sensor - An output that causes the PCM to sense a higher than normal manifold pressure (low vacuum) can cause the system to go rich. Disconnecting the MAP sensor will allow the PCM to set a fixed value for the MAP sensor. Substitute a different MAP sensor if the rich condition is gone while the sensor is disconnected.
* Pressure regulator - Check for a leaking fuel pressure regulator diaphragm by checking for the presence of liquid fuel in the vacuum line to the regulator.
* TP sensor - An intermittent TP sensor output will cause the system to go rich due to a false indication of the engine accelerating.
* O2S 1 contamination - Inspect O2S 1 for silicone contamination from fuel or use of improper RTV sealant. The sensor may have a white powdery coating and result in a high but false voltage signal (rich exhaust indication). The PCM will then reduce the amount of fuel delivered to the engine causing a severe surge or driveability problem.