DTC P2073: Manifold Absolute Pressure (MAP) Sensor Signal Higher Than Expected (KA / KC models)
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
| Execution | Once per driving cycle |
| Sequence | None |
| Duration | 2.0 seconds or more |
| DTC Type | Two drive cycles, MIL on |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| Elapsed time after VTEC switched | 3.0 seconds | - |
| Engine coolant temperature [ECT SENSOR 1] | 156 °F (69 °C) | - |
| Engine speed [ENGINE SPEED] | 1, 400 rpm | 5, 300 rpm |
| Vehicle speed [VEHICLE SPEED] | 15 mph (24 km/h) | - |
| Throttle position | Fully closed | - |
| Fuel feedback | During deceleration | - |
| No active DTCs set (prevents monitor from running) | P0010, P0011, P0107, P0108, P0117, P0118, P0122, P0123, P0171, P0172, P0201, P0202, P0203, P0204, P0222, P0223, P0300, P0301, P0302, P0303, P0304, P0341, P0351, P0352, P0353, P0354, P0401, P0404, P0443, P0496, P0497, P0502, P0506, P0507, P060A, P0720, P1009, P145C, P1659, P2074, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176, P2279, P2413, P2648, P2649 | |
[ ]: HDS Parameter
Malfunction Threshold
The MAP sensor output [MAP SENSOR] is 49 kPa (14.3 inHg, 363 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.
- MAP sensor output signal high
- Evaporative emission (EVAP) canister purge valve failure
- Valve timing incorrect
- Intake air system air leak
Confirmation Procedure
Operating Condition
- 1. Start the engine. Hold the engine speed [ENGINE SPEED] at 3, 000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on.
- 2. Drive the vehicle at a steady speed between 55 - 75 mph (88 - 120 km/h) for at least 10 seconds.
- 3. Decelerate with the throttle valve fully closed for at least 2 seconds.
- 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 12 volt battery.