Hi, this code is usually caused by the MAP sensor. Does the engine hesitate when you step on the accelerator? If yes, that's a bad MAP sensor. There is a test you can run on the MAP sensor, but you would need a voltmeter and a vacuum pump/gage. I have pasted the procedure below. The MAP sensor is under the spark plug cover and looks like the picture below.
The PCM is next to the battery. If you don't have a vacuum pump/gage but you do have a voltmeter, you could use your mouth to pull a small vacuum on the sensor just to see if it's actually functioning. The voltage on the yellow wire should drop as vacuum is applied to the port. You will need to have the key on and back-probe the connector to measure the voltage (put the other voltmeter terminal to engine ground). This will not prove the sensor is calibrated, but if it doesn't work at all, you will know to replace it. A new sensor costs $67 at autozone, so it's worth a few minutes to check the old one out. Please let me know if you have questions.
Removal & Installation
- Remove the battery cover.
- Disconnect the negative battery cable.
- Remove the plughole cover.
- Disconnect the vacuum hose.
- Disconnect sensor connector.
- Remove sensor mounting screw.
- Remove the sensor from intake manifold.
- Installation is the reverse of the removal procedure. Tightening torque to 32 in. lbs.
Testing
- Remove the MAP sensor with the sensor connector still connected
- Disconnect the vacuum hose from the sensor.
- Turn the ignition switch to the "ON" position.
- Measure the voltage at the PCM terminal No. 2AL and ground. Voltage should be 2.69-4.37 volts.
- Install a vacuum pump to the sensor and apply 8.86 in. Hg to the sensor. Voltage variance should be 1.16-1.27 volts.
- If not within specification, check connectors and wiring between MAP sensor and PCM. Repair/replace as necessary. If ok, replace MAP sensor
- If within specifications, replace PCM.
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