You’re probably not aware that your Acura’s onboard computer is constantly monitoring its performance and storing trouble codes when it detects an issue. These codes, known as OBD-II codes, can reveal the root cause of problems like engine stalling, faulty sensors, or transmission issues.
But did you know that Acura has its own set of manufacturer-specific codes that require specialized knowledge and equipment to diagnose and repair? Understanding these codes can mean the difference between a quick fix and a costly overhaul. Are you curious about how to decipher the secrets of your Acura’s OBD-II codes?
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Understanding OBD-II Codes
Most modern vehicles, including Acuras, rely on onboard diagnostics (OBD-II) to detect and report problems.
When you notice a “check engine” light on your dashboard, it’s likely that your vehicle’s OBD-II system has detected an issue. You’ll want to know what’s wrong, and that’s where OBD-II trouble codes come in.
These alphanumeric codes identify specific problems in your vehicle, divided into generic (P0xxx) and manufacturer-specific (P1xxx) categories. Generic codes cover issues like fuel and air metering systems, fuel injector circuits, and ignition systems.
Manufacturer-specific codes, on the other hand, are unique to Acura and other brands. Understanding these codes is vital to diagnosing and repairing problems in your vehicle’s systems, including engine, transmission, emissions, and more.
Acura-Specific Trouble Codes Explained
When troubleshooting your Acura, you’ll likely encounter Acura-specific trouble codes that require specialized diagnosis and repair.
These codes, distinct from generic OBD-II codes, demand expertise and advanced diagnostic equipment. Unlike Ford-specific codes (P1000-P1099), Acura-specific codes have their own unique range.
If your check engine light illuminates, it’s essential to have your vehicle diagnosed and repaired by a certified Acura specialist. They’ll accurately identify and fix issues, ensuring your vehicle meets the latest Acura standards.
Less common codes may require additional research, but a certified specialist will have the expertise to get it right.
Diagnosing Issues With OBD-II Codes
Diagnosing your Acura’s issues with OBD-II codes demands a structured approach.
You’ll need to navigate the complexities of generic and manufacturer-specific codes, as well as overcome diagnostic challenges.
To guarantee accurate diagnosis and repair, follow these essential steps:
- Understand code categories: Familiarize yourself with generic (P0xxx) and manufacturer-specific (P1xxx) codes to determine the best course of action.
- Consult Acura resources: Harness certified Acura specialists, advanced diagnostic equipment, and official Acura documentation to diagnose and repair issues efficiently.
- Address rare codes: Be prepared to tackle less common OBD-II codes that may require specialized diagnosis and repair techniques.
- Verify repairs: Certify that all repairs meet the latest Acura standards to prevent further damage and achieve your vehicle’s peak performance.
Most Common Acura OBD-II Trouble Codes
|
Code
|
Description
|
|---|---|
|
Mass Airflow Sensor Out of Self-Test Range
|
|
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P1102
|
Mass Air Flow Sensor In Range But Lower Than Expected
|
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P1103
|
Mass Air Flow (MAF) Sensor Signal Higher Than Expected
|
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P1104
|
MAF Ground Malfunction
|
|
P1105
|
Manifold Absolute Pressure Sensor Malfunction
|
|
P1106
|
Barometric Pressure Sensor Circuit Range/Performance Problem
|
|
P1107
|
Barometric pressure (BARO) sensor circuit low voltage
|
|
P1108
|
Barometric Pressure (BARO) Sensor – Circuit Voltage High
|
|
P1109
|
BARO Sensor Circuit Out of Range HighP1114
|
|
P1110
|
Intake Valve Timing Control Bank 1
|
|
P1111
|
Intake air temperature (IAT) sensor – circuit/intermittent voltage high.
|
|
P1112
|
IAT Sensor Circuit Intermittent Low Voltage
|
|
Intake Resonance Switchover Solenoid Control Circuit Issue
|
|
|
P1114
|
Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage
|
|
P1115
|
Engine Coolant Temperature (ECT) sensor circuit – intermittent high voltage
|
|
P1116
|
Engine Coolant Temperature Sensor Performance Problem.
|
|
P1117
|
Engine Coolant Temperature (ECT) Sensor Circuit Intermittent
|
|
P1118
|
Manifold Absolute Temperature Circuit Low Input
|
|
P1119
|
Oxygen Sensor Heating Circuit, Bank 2, Sensor 1 Issue
|
|
P1120
|
Throttle Position Sensor Out Of Range
|
| P1121 |
Throttle Position Lower Than Expected
|
|
P1122
|
Throttle Position Sensor Signal Higher Than Expected
|
|
P1123
|
Long Term Fuel Trim Add.Air.,Bank1 System too Rich
|
|
P1124
|
Throttle Control Motor Relay Circuit Short
|
|
P1125
|
Throttle Position Sensor Intermittent; indicates that the APP sensor 1 and the APP sensor 2 signal circuits are out of correlation with each other.
|
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P1126
|
Long Term Fuel Trim Add.Air.,Bank2 System too Lean
|
|
P1127
|
Exhaust Not Warm Enough, Downstream Sensor Not Tested
|
|
P1128
|
Closed Loop Fuel Not Achieved Bank 1.
|
|
P1129
|
Manifold Absolute Pressure (MAP) sensor circuit reading higher than expected by the engine control module.
|
|
P1130
|
Heated oxygen sensor (HO2S) 2/3, faulty components
|
|
Lack Of HO2S Switch – Sensor Indicates Lean (Bank 1)
|
|
|
P1132
|
O2 Sensor Heating Circ., Bank 1+2 – Sensor 1 Short to B+
|
|
P1133
|
Heated Oxygen Sensor (HO2S) Insufficient Switching Sensor 1
|
|
P1134
|
Heated oxygen sensor (HO2S) – RH front – slow operation
|
|
P1135
|
Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
|
|
P1136
|
Long Term Fuel Trim Add, Fuel Bank 1 System Too Lean
|
|
P1137
|
Lack Of Heated Oxygen Sensor Switches Bank 1 Sensor 2; indicates a lean condition.
|
|
P1138
|
Camshaft timing issue; if over-retarded, it causes the engine light to illuminate.
|
|
P1139
|
Long Term Fuel Trim Additive Fuel Bank 2 System Too Rich.
|
|
P1140
|
Intake Valve Timing Control Performance Bank 1
|
|
P1141
|
Load Calculation Cross Check Range/Performance
|
|
P1142
|
Load Calculation Cross Check Lower Limit Exceeded
|
|
P1143
|
Load Calculation Cross Check Upper Limit Exceeded
|
|
P1144
|
Mass or Volume Air Flow Circuit Open/Short to Ground
|
|
P1145
|
Mass or Volume Air Flow Circ Short to B+
|
|
P1146
|
Mass or Volume Air Flow Circ Supply Malfunction
|
|
P1147
|
Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1
|
|
P1148
|
Closed Loop Control Function Bank 1
|
|
P1149
|
Air/Fuel Ratio Sensor 1 Circuit Range/Performance Problem
|
|
P1150
|
Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction
|
