P0103

(P0103) MAF SENSOR CIRCUIT LOW





When Monitored and Set Condition
^ When Monitored: With the engine running and no fault in the throttle valve actuator.
^ Set Condition: The Mass Air Flow (MAF) Sensor value is less than 16 kg/h when the throttle valve angle is greater than 140 for approximately 5 seconds, or the MAF Sensor reading is greater than a calculated value that is determined by engine speed and throttle valve angle for approximately 5 seconds.

POSSIBLE CAUSES
- FUSED ENGINE CONTROL RELAY OUTPUT CIRCUIT OPEN
- FUSED ENGINE CONTROL RELAY OUTPUT CIRCUIT SHORT TO GROUND
- MASS AIR FLOW SENSOR SIGNAL CIRCUIT OPEN
- MASS AIR FLOW SENSOR SIGNAL CIRCUIT SHORT TO GROUND
- 5-VOLT SUPPLY CIRCUIT OPEN
- 5-VOLT SUPPLY CIRCUIT SHORT TO GROUND
- MASS AIR FLOW SENSOR
- POWERTRAIN CONTROL MODULE



Diagnostic Test
1. CHECK FOR CURRENT DTC





Turn the ignition on. With the DRBIII, read PCM DTCs.
Is this DTC present?
Yes >> For complete diagnosis of this DTC, refer to (P0102) MASS AIR FLOW CIRCUIT. P0102
No >> Go To 2

2. INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.

Note: Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors specific to this DTC. Wiggle the wires while checking for shorts and open circuits.

Note: Check for any Technical Service Bulletins that may apply.

Were there any problems found?
Yes >> Repair as necessary. Perform POWERTRAIN VERIFICATION TEST - VER 2 Powertrain Verification Test - Ver 2.
No >> The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition.