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DTC P0108 [L8, LF, L3]

id0102a1803500

DTC P0108 | MAP sensor circuit high input
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DETECTION CONDITION | • The PCM monitors the input voltage from the MAP sensor when intake air temperature is above -10 °C {14 °F}. If input the voltage is above 4.9 V, the PCM determines that the MAP sensor circuit has a malfunction. MONITORING CONDITIONS - Calculated load: 13-32 % Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition during first drive cycle. • PENDING CODE is available if the PCM detects the above malfunction condition. • FREEZE FRAME DATA is available. • DTC is stored in the PCM memory.
POSSIBLE CAUSE | • MAP sensor malfunction • Connector or terminal malfunction • Open circuit in wiring harness between MAP sensor terminal A and PCM terminal 2AY • Open circuit in wiring harness between MAP sensor terminal D and PCM terminal 2AG • MAP sensor signal circuit shorts to constant voltage supply circuit • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to the available Service information. If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT MAP SENSOR CONNECTOR FOR POOR CONNECTION • Disconnect the MAP sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion.) • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 8.
No | Go to the next step.
4 | VERIFY MAP SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between the MAP sensor terminal A (wiring harness-side) and body ground. • Is there continuity? | Yes | Go to the next step.
No | Inspect for open an circuit in the wiring harness between PCM terminal 2AY (wiring harness-side) and MAP sensor terminal A (wiring harness-side). Repair or replace suspected harness, then go to Step 8.
5 | INSPECT PCM CONNECTOR • Disconnect the PCM connector. • Inspect for poor connection at terminals (such as damaged/pulled-out pins, corrosion.) • Is there any malfunction? | Yes | Repair the terminal, then go to Step 8.
No | Go to the next step.
6 | VERIFY MAP SENSOR SIGNAL CIRCUIT FOR SHORT TO CONSTANT VOLTAGE CIRCUIT • Inspect for continuity between MAP sensor terminal D and C (wiring harness-side). • Is there continuity? | Yes | Repair or replace the wiring harness, then go to Step 8.
No | Go to the next step.
7 | VERIFY MAP SENSOR CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between the following: - MAP sensor terminal D (wiring harness-side) and PCM terminal 2AG (wiring harness-side) - MAP sensor terminal C (wiring harness-side) and PCM terminal 2AU (wiring harness-side) • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness, then go to the next step.
8 | VERIFY TROUBLESHOOTING OF DTC P0108 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn the ignition switch to the ON position (Engine off). • Clear the DTC from the memory using the WDS or equivalent. • Start the engine. • Is the same DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L8, LF, L3].)
No | Go to the next step.
9 | VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [L8, LF, L3].) • Are any DTC present? | Yes | Go to the applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)
No | Troubleshooting completed.