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DTC Advanced Diagnostics: P2073
DTC P2073:Manifold Absolute Pressure (MAP) Sensor Signal Higher Than Expected (Engine Type: J35Y1, J35Y2)
General Description
The manifold absolute pressure (MAP) sensor senses manifold absolute pressure (vacuum) and converts it into electrical signals. The MAP sensor outputs low signal voltage at high vacuum (throttle valve closed) and high signal voltage at low vacuum (throttle valve wide open). The powertrain control module (PCM) compares a predetermined MAP value at a given throttle position and manifold absolute pressure to the output voltage value of the MAP sensor. If the MAP sensor outputs high voltage during fuel cut-off operation for deceleration with the throttle valve fully closed, which should make the manifold absolute pressure lower, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
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Execution |
Once per driving cycle |
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Sequence*1 |
P0122, P0123, P0222, P0223, P1658, P1659, P1683, P1684, P2101, P2118, P2135, P2176 are judged as OK |
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Sequence*2 |
None |
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Duration |
2.0 seconds or more |
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DTC Type |
Two drive cycles, MIL on |
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OBD Status |
PASSED/FAILED/NOT COMPLETED (STILL TESTING) | |
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Enable Conditions
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Condition |
Minimum |
Maximum |
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Elapsed time after cylinder pausing*2 |
3.0 seconds |
– |
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Engine coolant temperature
[ECT SENSOR 1] |
156 °F (69 °C) |
– |
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Engine speed
[ENGINE SPEED] |
1,200 rpm |
5,500 rpm |
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Vehicle speed
[VEHICLE SPEED] |
15 mph (24 km/h) |
– |
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Throttle position |
Fully closed |
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Fuel feedback |
During deceleration |
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No active DTCs set (prevents monitor from running) |
P0107, P0108, P0117, P0118, P0122, P0123, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0222, P0223, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0351, P0352, P0353, P0354, P0355, P0356, P0401, P0404, P0443, P0506, P0507, P060A, P0627, P0720, P0722, P1659, P2101, P2118, P2135, P2176, P2279, P2413, P2646, P2647, P2648, P2649, P2652, P2654, P2656, P2657, P2658, P2659 | |
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Malfunction Threshold (A/T model)
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When 6 cylinder mode (no cylinders are paused), the MAP sensor output [MAP SENSOR] is 37 kPa (11.0 inHg, 277 mmHg) or more for at least 2.0 seconds. |
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When 3 cylinder mode (3 cylinders are paused), the MAP sensor output [MAP SENSOR] is 54 kPa (16.0 inHg, 405 mmHg) or more for at least 2.0 seconds. |
Malfunction Threshold (M/T model)
The MAP sensor output [MAP SENSOR] is 37 kPa (11.0 inHg, 277 mmHg) or more for at least 2.0 seconds.
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
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MAP sensor output signal high |
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Evaporative emission (EVAP) canister purge valve failure |
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Valve timing incorrect |
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Intake air system air leak |
Confirmation Procedure (A/T model)
Operating Condition
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1. |
Start the engine. Hold the engine speed [ENGINE SPEED] at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle. |
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2. |
Drive the vehicle at a steady speed between 55 - 75 mph (88 - 120 km/h) for at least 10 seconds. |
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3. |
Drive the vehicle at a speed of 15 mph (24 km/h) or more under Enable Conditions (see “Throttle position“ and “Engine speed [ENGINE SPEED]“) for at least 5 seconds. |
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Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow. |
With the HDS
None.
Confirmation Procedure (M/T model)
Operating Condition
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1. |
Start the engine. Hold the engine speed [ENGINE SPEED] at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle. |
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2. |
Drive the vehicle at a steady speed between 55 - 75 mph (88 - 120 km/h) for at least 10 seconds. |
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3. |
Decelerate with the throttle valve fully closed for at least 2 seconds. |
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Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow. |
With the HDS
None.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery. |
