Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1999 Acura 2.3CL StandardFACTORY OEM SERVICE PROCEDURE
Engine Controls - Self-Diagnostics
- Introduction
- Self-Diagnostic System
- Test Equipment
- Summary
- Connector Identification
- Diagnostic Circuit Check
- Diagnostic Tests
- DTC P0107: Manifold Absolute Pressure (Map) Sensor Low Input Voltage
- DTC P0108: Manifold Absolute Pressure (Map) Sensor High Input Voltage
- DTC P0112: Intake Air Temperature (IAT) Sensor Low Input Voltage
- DTC P0113: Intake Air Temperature (IAT) Sensor High Input Voltage
- DTC P0116: Engine Coolant Temperature (ECT) Sensor Range/Performance Problem
- DTC P0117: Engine Coolant Temperature (ECT) Sensor Low Input Voltage
- DTC P0118: Engine Coolant Temperature (ECT) Sensor High Input Voltage
- DTC P0122: Throttle Position (TP) Sensor Low Input Voltage
- DTC P0123: Throttle Position (TP) Sensor High Input Voltage
- DTC P0131: Primary Heated Oxygen Sensor (Ho2S-1) Circuit Low Voltage
- DTC P0132: Primary Heated Oxygen Sensor (Ho2S-1) Circuit High Voltage
- DTC P0133: Primary Heated Oxygen Sensor (Ho2S-1) Slow Response
- DTC P0135 Or P0141: Heated Oxygen Sensor (Ho2S) Heater Circuit Malfunction
- DTC P0137: Secondary Ho2S-2 Circuit Low Voltage
- DTC P0138: Secondary Ho2S-2 Circuit High Voltage
- DTC P0139: Secondary Ho2S-2 Slow Response
- DTC P0171 Or P0172: Fuel System Too Lean Or Too Rich
- DTC P0300 Set With DTC P0301, P0302, P0303 Or P0304: Random Misfire
- DTC P0301, P0302, P0303, Or P0304: Misfire In One Cylinder
- DTC P0325: Knock Sensor (KS) Circuit Malfunction
- DTC P0335, P0336, P1361 Or P1362: Crankshaft Position/Top Dead Center (CKP/TDC) Sensor
- DTC P0401: EGR System Insufficient Flow Detected
- DTC P0420: Catalyst System Efficiency Below Threshold
- DTC P0452: Fuel Tank Pressure Sensor Circuit Low Input
- DTC P0453: Fuel Tank Pressure Sensor Circuit High Input
- DTC P0500: Vehicle Speed Sensor (VSS) Circuit Malfunction
- DTC P0505: Idle Control System Malfunction
- DTC P1106: Barometric Pressure (BARO) Sensor Circuit Range/Performance Problem
- DTC P1107 Or DTC P1108: Barometric Pressure (BARO) Sensor Circuit Low/High Input Voltage
- DTC P1121: Throttle Position (TP) Lower Than Expected
- DTC P1122: Throttle Position (TP) Higher Than Expected
- DTC P1128: Manifold Absolute Pressure (Map) Lower Than Expected
- DTC P1129: Manifold Absolute Pressure (Map) Higher Than Expected
- DTC P1259: VTEC System Malfunction
- DTC P1297: Electrical Load Detector (Eld) Low Voltage Input
- DTC P1298: Electrical Load Detector (Eld) High Voltage Input
- DTC P1359: Crankshaft Position/Top Dead Center (CKP/TDC) Sensor Disconnected
- DTC P1381 Or P1382: Cylinder Position (CYP) Sensor
- DTC P1456: EVAP Control System
- DTC P1457: EVAP Control System
- DTC P1491: EGR Valve Lift Insufficient Detected
- DTC P1498: EGR Valve Lift Sensor High Voltage
- DTC P1519: Idle Air Control (IAC) Valve Circuit Failure
- DTC P1607: Powertrain Control Module (Pcm) Internal Circuit Failure "A"
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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