Check Engine Light Codes Discussion

[fabulous010]

i finally installed my TSX IM. i also installed the hondata thermal gasket. the hardest part was topping off my radiator. i had to drain it to open up the injector base.

now i got a engine light on. i did just what was on the write up. but as an addition i took of the six bolts that hold the injector base to the head. pulled it out enough to squeeze the hondata gasket in and bolted her back up. i also got rid of the intake resonator, then i finished off the IM job. what could this engine light be? i topped of the rad and the temperature of the engine seems fine. the car runs great but i am alittle concerned... PLEASE HELP

[CrackerTeg]

Without knowing the code or codes, we can't really help. Get the codes pulled at your local parts store (I don't know if they have Autozone up in Toronto) and let us know.

[fabulous010]

i was going to diagnose it tomorrow, but i went for a 20-minute drive and suddenly the engine light turned off! i'm hoping it stays off, if not i will diagnose it. but i pray that it doesn't come back.

thanks Z

[CrackerTeg]

Even with the light off, the code is stored in your ECM. I'd still get the code pulled to see if it's related.

[fabulous010]

got that code checked out. my friend said its not a major alert. its just basically saying that its the engine is running richer. i figured that the computer had to adjust to the changes. but ill keep an eye on out. but should i still be concerned.

[CrackerTeg]

got that code checked out. my friend said its not a major alert. its just basically saying that its the engine is running richer. i figured that the computer had to adjust to the changes. but ill keep an eye on out. but should i still be concerned.

Clear the codes and let your ECM relearn your driving habits. Still keep an eye for it though. Otherwise you should be good. BTW, what code did you get exactly?

[fabulous010]

the code i got was 0171

[fabulous010]

code 0171 means too lean.

[fabulous010]

the code was 0171 "too lean"...it was only came on for a whiel. later on that night it went away and never came back... i guess it means i just have more air coming in from my deleted resonator w/K&N drop in, and TSX IM. ever since then ive driven over 100 kms and no codes came up. she running great too!

[CrackerTeg]

That code is P0171. Supposedly its an O2 sensor related code. And yes its saying you got a lean mixture. That code popped on me a couple of months back and I asked about it on the old G7. I was told to replace the sensor, but the code hasn't popped since then. I did, however, throw a can of Seafoam in my tank along with premium for a tank to clean up any kind of crap I had in there. So far, so good. Also, if your buddy didn't clear the code for you, ask him to clear it so it doesn't come up later on when you do have a problem.

[status]

love this sight, answered my Q about 0171, im going to try the sea foam and premium, also gonna try to clean the maf.

[MyNameIsThien]

P2A00: Definition: Air/Fuel Ratio (A/F) Sensor (Sensor 1) Range/Performance Problem
P0010: Definition: Intake Cam Position Actuator Circuit Open - Bank 1
Explanation: The comprehensive component monitor, referred to as the CCM, monitors the Variable Camshaft Timing (VCT) circuit to the computer for high and low voltages. If the voltage falls below a set limit for a specific amount of time during this test, the check engine light will come on and set this trouble code. Open or short in the VCT circuit
Open in the Vehicle Power circuit
Open or short in the VCT solenoid valve itself
Damaged computer (PCM) are the possible causes.
Remedy:
P0011: Definition: Intake Cam Position Timing Over Advanced - Bank 1
Explanation: The comprehensive component monitor, referred to as the CCM, monitors the Variable Camshaft Timing (VCT) position for over-advanced cam timing. If the cam timing exceeds a maximum calibrated limit or is stuck in an advanced position, the check engine light will come on and set this trouble code. The following would cause this to happen: Incorrect camshaft timing
VCT solenoid valve stuck open or continuous oil flow to piston chamber
Camshaft advance mechanism binding, or faulty VCT unit
P0101: Definition:
P0102:Definition: Mass Air Flow (MAF) Circuit Low Input
Explanation: Basically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. A more technical description would be that the MAF circuit had lower than expected voltage (air flow).
Causes: The MAF may be disconnected, or a wiring connection may be bad. The MAF may be dirty or otherwise contaminated (Note: if you use a reusable oiled air filter, be careful not to apply too much oil or that can contaminate the MAF). The MAF sensor may be faulty. The vehicle computer may be faulty (very rare)
Possible solutions: Verify that the Mass Air Flow Sensor wiring is connected properly and that there are no broken / frayed wires. Inspect for any air leaks near the MAF sensor. Take the MAF out and clean it using a spray cleaner such as brake cleaner or electrical contact cleaner. Be gentle with the sensor. Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information). Replace the MAF sensor.  
P0103:
P0107:
P0108:
P0112:
P0113: Definition: Intake Air Temperature Circuit High Input
Explanation: The powertrain control module (PCM) monitors the temperature of the air entering the engine. The PCM supplies a 5 volt reference voltage to the Intake Air Temperature (IAT) sensor. The IAT is a thermistor that varies resistance based on temperature. As the temperature increases, resistance decreases. Low temperature results in a high signal voltage. When the PCM sees a signal voltage higher than 5 volts, it sets this P0113 check engine light code.
Causes: Internally failed IAT sensor. Faulty connection at IAT sensor. Open in IAT ground circuit or signal circuit. Short to voltage in IAT signal circuit or reference circuit. IAT harness and/or wiring routed too close to high-voltage wiring (e.g. alternator, spark plug cables, etc.). Faulty PCM (less likely but not impossible).
Remedy: First, if you have access to a scan tool, is there an IAT reading? If the IAT reading is logical then the problem is likely intermittent. If the reading is less than -30 degrees, unplug the connector. Install a jumper wire between the harness connector signal and ground circuits. The IAT temperature reading on the scan tool should be maxed out at the high end. For example it should be 280 degrees Farenheit or higher. If it is, the wiring is okay, and it may have been the connection. If it isn't install the jumper wire between the IAT signal circuit and the chassis ground. If now the IAT reading on the scan tool is maxed out then check for an open in the IAT ground circuit. If you get no reading at all on the scan tool, it's likely that the sensor signal is open or the 5 volt reference is missing. Check using a DVOM (digital volt ohm meter) for a 5 volt reference. If it's there, then unplug the connector at the PCM and check for continuity on the IAT signal circuit between the PCM connector and the IAT connector.
P0116:
P0117:
P0118:
P0122:
P0123:
P0125:
P0128:
P0133:
P0134:
P0135:
P0137:
P0138:
P0139:
P0141:: Definition:Secondary HO2S heater malfunction
Explanation: There is a heater malfunction for the secondary heated oxygen sensor located in the catalytic converter.
Remedy: Replace secondary heated oxygen sensor and clear codes.
P0171: Definition: Primary o2 Sensor Malfunction
Explanation: There is a heater malfunction for the primary heated oxygen sensor located on the exhaust manifold. When code is read it should say if the code was thrown because of rich or lean conditions.
Remedy: Clear codes, drive around for ~40miles. If code re-appears then check codes again. If same code replace.
P0172:
P0300:
P0301:
P0302:
P0303:
P0304:
P0325:
P0335:
P0339:
P0340:
P0341:
P0344:
P0365:
P0369:
P0401:
P0404:
P0406:
P0420:
P0442:
P0443:
P0451:
P0452:
P0453:
P0456:
P0457:
P0496:
P0497:
P0498:
P0499:
P0506:
P0507:
P0511: Definition: Idle Air Control (IAC) Valve Circuit Malfuntion
Explanation: The IAC cannot determine the correct setting.
Remedy: Check that all plugs and sensors are properly connected, including under the throttle body. Connect any that have come loose or disconnected.
P0563:
P0603:
P0606:
P0685:
P0700:
P0705:
P0706:
P0711:
P0712:
P0713:
P0716:
P0717:
P0718:
P1106: Definition: BARO Circuit Range/Performance Malfunction
P1107: Definition: BARO Circuit Low Input
P1108: Definition: BARO Circuit High Input
P1121: Definition: Throttle Position Lower Than Expected
P1122: Definition: Throttle Position Higher Than Expected
P1128: Definition: MAP Lower Than Expected
P1129: Definition: MAP Higher Than Expected
P1162: Definition: HO2S11 Circuit Fault (Bank 1 Sensor 1)
P1163: Definition: HO2S11 Slow Response (Bank 1 Sensor 1)
P1164: Definition: HO2S11 Circuit Fault (Bank 1 Sensor 1)
P1165: Definition: HO2S11 Slow Response(Bank 1 Sensor 1)
P1166: Definition: HO2S11 Heater Circuit Fault (Bank 1 Sensor 1)
P1167: Definition: HO2S11 Heater Circuit (VS+) Fault (Bank 1 Sensor 1)
P1168: Definition: HO2S11 Label Circuit Low Voltage Fault (Bank 1 Sensor 1)
P1169: Definition: HO2S11 Label Circuit High Voltage Fault (Bank 1 Sensor 1)
P1201: Definition: Cylinder 1 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0301
P1202: Definition: Cylinder 2 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0302
P1203: Definition: Cylinder 3 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0303
P1204: Definition: Cylinder 4 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0304
P1205: Definition: Cylinder 5 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0305
P1206: Definition: Cylinder 6 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0306
P1241: Definition: Throttle Vent Control Motor Circuit 1 Malfunction
P1242: Definition: Throttle Vent Control Motor Circuit 2 Malfunction
P1243: Definition: Throttle Position Insufficient
P1244: Definition: Closed Throttle Position Insufficient
P1246: Definition: Accelerator Position Sensor 1 Circuit Malfunction
P1247: Definition: Accelerator Position Sensor 2 Circuit Malfunction
P1248: Definition: Accelerator Position Sensors 1 & 2 Improper Correlation
P1253: Definition: VTEC System Circuit Fault
P1259: Definition: VTEC System Malfunction, Rear Bank (Bank 1)
P1279: Definition: VTEC System Malfunction, Front Bank (Bank 2)
P1297: Definition: ELD Circuit Low Input
P1298: Definition: Electrical Load Detector Circuit High Voltage
P1300: Definition: Random Misfire
P1301: Definition: Cylinder 1 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0301
P1302: Definition: Cylinder 2 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0302
P1303: Definition: Cylinder 3 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0303
P1304: Definition: Cylinder 4 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0304
P1305: Definition: Cylinder 5 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0305
P1306: Definition: Cylinder 6 Misfire - Compare possible causes/symptoms for this Honda check engine light code to the Generic OBD II code P0306
P1316: Definition: Spark Plug Voltage Detection Circuit Malfunction, Front Bank
P1317: Definition: Spark Plug Voltage Detection Circuit Malfunction, Rear Bank
P1318: Definition: Spark Plug Voltage Detection Module Reset Circuit Malfunction, Front Bank
P1319: Definition: Spark Plug Voltage Detection Module Reset Circuit Malfunction, Rear Bank
P1324: Definition: Knock Sensor Power Source Circuit Low Voltage
P1336: Definition: CKP Sensor B Range/Performance
P1337: Definition: CKP Sensor B Low Input
P1359: Definition: CKP/TDC Sensor Circuit Connector Disconnection
P1361: Definition: TDC Sensor Intermittent Interruption
P1362: Definition: TDC 1 Sensor No Signal
P1366: Definition: TDC 2 Sensor Intermittent
P1367: Definition: TDC 2 Sensor No Signal
P1381: Definition: CYP Sensor A Intermittent Interruption
P1382: Definition: CYP Sensor A No Signal
P1386: Definition: CYP Sensor B Intermittent Interruption
P1387: Definition: CYP Sensor B No Signal
P1456: Definition: Evaporative Emission Control System Leak Detected (Fuel Tank System)
P1457: Definition: Evaporative Emission Control System Leak Detected (Control Canister System)
P1459: Definition: EVAP Purge Flow Switch Malfunction
P1491: Definition: EGR Valve Lift Insufficient Detected
P1498: Definition: EGR Valve Lift Sensor High Voltage
P1508: Definition: IAC Valve Circuit Failure
P1519: Definition: IAC Valve Circuit Failure
P1607: Definition: ECM Internal Circuit Failure A
P1608: Definition: ECM Internal Circuit Failure B
P1655: Definition: TMA or TMB Signal Line Fault
P1656: Definition: Automatic Transmission System Malfunction
P1660: Definition: A/T FI Data Line Failure
P1671: Definition: A/T FI Data Line No Signal
P1672: Definition: A/T FI Data Line Failure
P1676: Definition: Traction Control System FI Data Line No Signal
P1677: Definition: Traction Control System FI Data Line Failure
P1678: Definition: FPTDR Signal Line Failure
P1681: Definition: A/T FI Signal A Low Input
P1682: Definition: A/T FI Signal A High Input
P1686: Definition: A/T FI Signal B Low Input
P1687: Definition: A/T FI Signal B High Input
P1690: Definition: Traction Control System STB Line Failure
P1696: Definition: Traction Control Fuel Cut Signal Low Input
P1697: Definition: Traction Control Fuel Cut Signal High Input
P1705: Definition: TCM A/T Gear Position Switch Circuit Shorted
P1706: Definition: TCM A/T Gear Position Switch Circuit Open
P1753: Definition: TCM A/T Lockup Solenoid Valve "A" Fault
P1758: Definition: TCM A/T Lockup Solenoid Valve "B" Fault
P1790: Definition: TCM A/T TP Sensor Circuit Fault
P1791: Definition: TCM A/T Vehicle Speed Sensor Circuit Fault
P1753: TCM A/T ECT Sensor Circuit Fault
P2195: Definition: Stuck lean O2 sensor
Explanation: The O2 sensor is sensing too much air and is "stuck" in the lean setting.
Remedy: Check that all plugs and sensors are properly connected, including under the throttle body. Connect any that have come loose or disconnected.
P2127: Definition: Accelerator Pedal Position (APP) Sensor 2 (Throttle Position Sensor E) Circuit Low Voltage
P2128: Definition: Accelerator Pedal Position (APP) Sensor 2 (Throttle Position Sensor E) Circuit High Voltage
P2135: Definition: Throttle Position (TP) Sensor 1/2 Incorrect Voltage Correlation
P2138: Definition: Accelerator Pedal Position (APP) Sensor 1/2 (Throttle Position Sensor D/E) Incorrect Voltage Correlation
P2176: Definition: Throttle Actuator Control System Idle Position Not Learned
P2195: Definition: Air/Fuel Ratio (A/F) Sensor (Sensor 1) Signal Stuck Lean
P2197: Definition: Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Signal Stuck Lean
P2227: Definition: Barometric Pressure (BARO) Sensor Circuit Range/Performance Problem
P2228: Definition: Barometric Pressure (BARO) Sensor Circuit Low Voltage
P2229: Definition: Barometric Pressure (BARO) Sensor Circuit High Voltage
P2237: Definition: Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) IP Line High Voltage
P2238: Definition: Air/Fuel Ratio (A/F) Sensor (Sensor 1) AFS+ Line Low Voltage
P2238: Definition: Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) IP Line Low Voltage
P2240: Definition: Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) IP Line High Voltage
P2241: Definition: Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) IP Line Low Voltage
P2243: Definition: Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VCENT Line High Voltage
P2245: Definition: Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VCENT Line Low Voltage
P2247: Definition: Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VCENT Line High Voltage
P2249: Definition: Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VCENT Line Low Voltage
P2251: Definition: Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VS Line High Voltage
P2252: Definition: Air/Fuel Ratio (A/F) Sensor (Sensor 1) AFS- Line Low Voltage
P2254: Definition: Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VS Line High Voltage
P2255: Definition: Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VS Line Low Voltage
P2279: Definition: Intake Air System Leak
P2413: Definition: Exhaust Gas Recirculation (EGR) System Range/Performance Problem
P2422: Definition: Evaporative Emission (EVAP) System Vent Shut Valve Close Malfunction
P2552: Definition: Throttle Actuator Control Module Relay Malfunction
P2627: Definition: Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) LABEL Circuit Low Voltage
P2628: Definition: Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) LABEL Circuit High Voltage
P2630: Definition: Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) LABEL Circuit Low Voltage
P2631: Definition: Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) LABEL Circuit High Voltage
P2646: Definition: VTEC Oil Pressure Switch Circuit Low Voltage
P2647: Definition: VTEC Oil Pressure Switch Circuit High Voltage
P2648: Definition: VTEC Solenoid Valve Circuit Low Voltage
P2649: Definition: VTEC Solenoid Valve Circuit High Voltage
P2769: Definition: Short in Torque Converter Clutch Solenoid Valve Circuit
P2770: Definition: Open in Torque Converter Clutch Solenoid Valve Circuit
P2A03: Definition: Front A/F Sensor Circuit (Bank 2, Sensor 1) Circuit Range/Performance Problem
U0073: Definition: FCAN Malfunction (Bus-off)
U0107: Definition: Lost Communication With Throttle Actuator Control Module
U0121: Definition: FCAN Malfunction (TCS-PCM)
U0155: Definition: FCAN Malfunction (Gauge Control Module-ECM/PCM

[CrackerTeg]

Hey Thien, good looks on posting up the definitions on these codes as well as making this particular thread a stickie. So, on that note, congrats to Fab for getting his thread stickied!

[Jade06]

Wow great thread! Answers to alot of future questions. Good job Thien for the codes and Fab for starting this thread!

[CrackerTeg]

Credit can also be given to Fab for starting the thread in the first place.