Toyota Corolla Cross: Manifold Absolute Pressure / Barometric Pressure Sensor Signal Stuck in Range (P01052A)

Toyota Corolla Cross (2022-2024) Service Manual / Engine & Hybrid System / M20a-fxs (engine Control) / Sfi System / Manifold Absolute Pressure / Barometric Pressure Sensor Signal Stuck in Range (P01052A)

DESCRIPTION

Refer to DTC P010511.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
P01052A	Manifold Absolute Pressure / Barometric Pressure Sensor Signal Stuck in Range	Intake manifold pressure measured after engine start drops by less than 3 kPa [0.4 psi] compared to the intake manifold pressure (atmospheric pressure) measured before engine start (2 trip detection logic).	Intake system E.F.I. vacuum sensor assembly	Comes on	SAE Code: P0106 DTC for Mexico Models: Does not apply

MONITOR DESCRIPTION

When the intake manifold pressure measured after engine start drops by less than 3 kPa [0.4 psi] compared to the intake manifold pressure (atmospheric pressure) measured before engine start, the ECM interprets this as a malfunction of the E.F.I. vacuum sensor assembly and stores DTC P01052A.

MONITOR STRATEGY

Related DTCs	P0106: E.F.I. vacuum sensor assembly stuck monitoring
Required Sensors/Components (Main)	E.F.I. vacuum sensor assembly
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	6 seconds
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	P0010, P1360, P1362, P1364, P1366, P2614 (Motor drive VVT system control module) P0011 (VVT system - advance) P0012 (VVT system - retard) P0014 (Exhaust VVT system - advance) P0015 (Exhaust VVT system - retard) P0016 (VVT system - misalignment) P0017 (Exhaust VVT system - misalignment) P0107, P0108 (Manifold absolute pressure) P0112, P0113 (Intake air temperature sensor) P0117, P0118 (Engine coolant temperature sensor) P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor) P0125 (Insufficient coolant temperature for closed loop fuel control) P0335, P0337, P0338 (Crankshaft position sensor) P0340, P0342, P0343 (Camshaft position sensor) P0365, P0367, P0368 (Exhaust camshaft position sensor) P0401 (EGR system (closed)) P0489, P0490 (EGR control circuit) P106A (Evaporative emission control system pressure sensor - manifold pressure sensor correlation)
Auxiliary battery voltage	10.5 V or higher
Engine coolant temperature	30°C (86°F) or higher
Intake air temperature	-10°C (14°F) or higher
Engine speed	900 rpm or higher
Throttle valve	Close
EGR valve	Close
Atmospheric pressure	76 kPa(abs) [11 psi(abs)] or higher

TYPICAL MALFUNCTION THRESHOLDS

Difference between intake manifold absolute pressure and atmospheric pressure

Higher than -3 kPa [-0.4 psi]

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the GTS on.
Put the engine in Inspection Mode (Maintenance Mode).
Click here
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher [A].
Idle the engine for 10 seconds or more [B].
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P01052A.

Check the DTC judgment result.

GTS Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions

HINT:

If the judgment result is NORMAL, the system is normal.
If the judgment result is ABNORMAL, the system is malfunctioning.
If the judgment result is INCOMPLETE, perform steps [A] through [C] again.
[A] to [C]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

CAUTION / NOTICE / HINT

NOTICE:

Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
Click here

(Select Powertrain in Health Check and then check the time stamp data.)

Click here
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
Click here

HINT:

Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.	CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P01052A)

(a) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTC P01052A is output	A
DTC P01052A and other DTCs are output	B

HINT:

If any DTCs other than P01052A are output, troubleshoot those DTCs first.

GO TO DTC CHART

2.	READ VALUE USING GTS (INTAKE MANIFOLD ABSOLUTE PRESSURE)

(a) Enter the following menus.

Powertrain > Engine > Data List

Tester Display
Intake Manifold Absolute Pressure

(b) According to the display on the GTS, read the Data List.

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(d) Start the engine.

(e) According to the display on the GTS, read the Data List.

Standard:

Engine Condition	Intake Manifold Absolute Pressure
Ignition switch ON	80 to 110 kPa (11.6 to 15.95 psi)
Idling	20 to 40 kPa (2.9 to 5.8 psi)

CHECK FOR INTERMITTENT PROBLEMS

3.	CHECK INTAKE SYSTEM

(a) Check the intake system for vacuum leaks.

Click here

OK:

No leaks from intake system.

HINT:

Perform "Inspection After Repair" after repairing or replacing the intake system.

Click here

REPLACE E.F.I. VACUUM SENSOR ASSEMBLY

REPAIR OR REPLACE INTAKE SYSTEM

SEE MORE:

Freeze Frame Data

FREEZE FRAME DATA HINT: The ECU records vehicle and driving condition information as freeze frame data the moment a DTC is stored. CHECK FREEZE FRAME DATA (a) Select the DTCs (with snow icon) for which freeze frame data is recorded. Body Electrical > Air Conditioner > Trouble Codes LIST OF

ECM Communication Stop Mode

DESCRIPTION Detection Item Symptom Trouble Area ECM Communication Stop Mode Communication stop for "ECM (Engine)" is indicated on the "Communication Bus Check" screen of the GTS. Click here ECM

Toyota Corolla Cross: Manifold Absolute Pressure / Barometric Pressure Sensor Signal Stuck in Range (P01052A)

READ NEXT:

Intake Air Temperature Sensor 1 Bank 1 Circuit Short to Ground (P011011)

Intake Air Temperature Sensor 1 Bank 1 Circuit Short to Battery or Open (P011015)

Intake Air Temperature Sensor 1 Bank 1 Signal Stuck in Range (P01102A)

SEE MORE:

Freeze Frame Data

ECM Communication Stop Mode