2003 Acura MDX BaseFACTORY OEM SERVICE PROCEDURE

DTC Codes

DTC CHARTS

DTC Description
DTC P0036, P0056  Rear Secondary HO2S (Bank 1, Sensor 2) Heater Circuit Malfunction; Front Secondary HO2S (Bank 2, Sensor 2) Heater Circuit Malfunction
DTC P0097  IAT Sensor 2 Circuit Low Voltage (2003-2004 models)
DTC P0098  IAT Sensor 2 Circuit High Voltage (2003-2004 models)
DTC P0107  MAP Sensor Circuit Low Voltage
DTC P0108  MAP Sensor Circuit High Voltage
DTC P0111  IAT Sensor Circuit Range/Performance Problem (2005-2006 models)
DTC P0112  IAT Sensor 1 Circuit Low Voltage (2003-2004 models)
DTC P0112  IAT Sensor Circuit Low Voltage (2005-2006 models)
DTC P0113  IAT Sensor 1 Circuit High Voltage (2003-2004 models)
DTC P0113  IAT Sensor Circuit High Voltage (2005-2006 models)
DTC P0116  ECT Sensor Range/Performance Problem (2003-2004 models)
DTC P0116  ECT Sensor Range/Performance Problem (2005-2006 models)
DTC P0117  ECT Sensor Circuit Low Voltage
DTC P0118  ECT Sensor Circuit High Voltage
DTC P0125  ECT Sensor Malfunction/Slow Response (2003-2004 models)
DTC P0125  ECT Sensor Malfunction/Slow Response (2005-2006 models)
DTC P0128  Cooling System Malfunction
DTC P0133, P0153  Rear A/F Sensor (Bank 1, Sensor 1) Slow Response; Front A/F Sensor (Bank 2, Sensor 1) Slow Response
DTC P0134, P0154  Rear A/F Sensor (Bank 1, Sensor 1) Heater System Malfunction; Front A/F Sensor (Bank 2, Sensor 1) Heater System Malfunction
DTC P0135  Rear A/F sensor (Bank 1, Sensor 1) Heater Circuit Malfunction; DTC P0155: Front A/F sensor (Bank 2, Sensor 1) Heater Circuit Malfunction
DTC P0137, P0157  Rear Secondary HO2S (Bank 1, Sensor 2) Circuit Low Voltage (2003-2004 models); Front Secondary HO2S (Bank 2, Sensor 2) Circuit Low Voltage (2003-2004 models)
DTC P0137, P0157  Rear Secondary HO2S (Bank 1, Sensor 2) Circuit Low Voltage (2005-2006 models); Front Secondary HO2S (Bank 2, Sensor 2) Circuit Low Voltage (2005-2006 models)
DTC P0138, P0158  Rear Secondary HO2S (Bank 1, Sensor 2) Circuit High Voltage (2003-2004 models); Front Secondary HO2S (Bank 2, Sensor 2) Circuit High Voltage (2003-2004 models)
DTC P0138, P0158  Rear Secondary HO2S (Bank 1, Sensor 2) Circuit High Voltage (2005-2006 models); Front Secondary HO2S (Bank 2, Sensor 2) Circuit High Voltage (2005-2006 models)
DTC P0139, P0159  Rear Secondary HO2S (Bank 1, Sensor 2) Circuit Slow Response (2003-2004 models); Front Secondary HO2S (Bank 2, Sensor 2) Circuit Slow Response (2003-2004 models)
DTC P0139, P0159  Rear Secondary HO2S (Bank 1, Sensor 2) Slow Response (2005-2006 models); Front Secondary HO2S (Bank 2, Sensor 2) Slow Response (2005-2006 models)
DTC P0141, P0161  Rear Secondary HO2S (Bank 1, Sensor 2) Heater Circuit Malfunction; Front Secondary HO2S (Bank 2, Sensor 2) Heater Circuit Malfunction
DTC P0171, P0172, P0174, P0175  Rear Bank (Bank 1) Fuel System Too Lean; Rear Bank (Bank 1) Fuel System Too Rich; Front Bank (Bank 2) Fuel System Too Lean; Front Bank (Bank 2) Fuel System Too Rich
DTC P0201, P0202, P0203, P0204, P0205, P0206  No. 1 Injector Circuit Malfunction; No. 2 Injector Circuit Malfunction; No. 3 Injector Circuit Malfunction; No. 4 Injector Circuit Malfunction; No. 5 Injector Circuit Malfunction; No. 6 Injector Circuit Malfunction
DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306  Random Misfire and Any Combination of the Following; No. 1 Cylinder Misfire Detected; No. 2 Cylinder Misfire Detected; No. 3 Cylinder Misfire Detected; No. 4 Cylinder Misfire Detected; No. 5 Cylinder Misfire Detected; No. 6 Cylinder Misfire Detected
DTC P0301, P0302, P0303, P0304, P0305, P0306  No. 1 Cylinder Misfire Detected; No. 2 Cylinder Misfire Detected; No. 3 Cylinder Misfire Detected; No. 4 Cylinder Misfire Detected; No. 5 Cylinder Misfire Detected; No. 6 Cylinder Misfire Detected
DTC P0325  Knock Sensor Circuit Malfunction
DTC P0335, P0385  CKP Sensor A No Signal; CKP Sensor B No Signal
DTC P0339, P0389  CKP Sensor A Intermittent Interruption; CKP Sensor B Intermittent Interruption
DTC P0340  CMP Sensor No Signal
DTC P0344  CMP Sensor Intermittent Interruption
DTC P0563  PCM Power Source Circuit Unexpected Voltage
DTC P0603  PCM Internal Control Module (Keep Alive Memory (KAM) Error)
DTC P0630  VIN Not Programmed or Mismatch (2005-2006 models)
DTC P0641  Sensor Reference Voltage A Malfunction; DTC P0651: Sensor Reference Voltage B Malfunction
DTC P0657  A/F Sensor Relay Circuit Malfunction
DTC P0685  PCM Power Control Circuit/Internal Circuit Malfunction
DTC P0700  A/T Control System Malfunction
DTC P1109  BARO Sensor Circuit Out of Range High (2005-2006 models)
DTC P1116  ECT Sensor Performance Problem (2005-2006 models)
DTC P1128  MAP Sensor Signal Lower Than Expected
DTC P1129  MAP Sensor Signal Higher Than Expected
DTC P1172, P1174  Rear A/F Sensor (Bank 1, Sensor 1) Out of Range High (2005-2006 models); Front A/F Sensor (Bank 2, Sensor 1) Out of Range High (2005-2006 models)
DTC P1297  ELD Circuit Low Voltage
DTC P1298  ELD Circuit High Voltage
DTC P2195, P2197  Rear A/F Sensor (Bank 1, Sensor 1) Signal Stuck Lean; Front A/F Sensor (Bank 2, Sensor 1) Signal Stuck Lean
DTC P2199  IAT Sensor 1, 2 Correlation (2003-2004 models)
DTC P2227  BARO Sensor Circuit Range/Performance Problem
DTC P2228  BARO Sensor Circuit Low Voltage
DTC P2229  BARO Sensor Circuit High Voltage
DTC P2237, P2240  Rear A/F Sensor (Bank 1, Sensor 1) IP Line High Voltage; Front A/F Sensor (Bank 2, Sensor 1) IP Line High Voltage
DTC P2238, P2241  Rear A/F Sensor (Bank 1, Sensor 1) IP Line Low Voltage; Front A/F Sensor (Bank 2, Sensor 1) IP Line Low Voltage
DTC P2243, P2247  Rear A/F Sensor (Bank 1, Sensor 1) VCENT Line High Voltage; Front A/F Sensor (Bank 2, Sensor 1) VCENT Line High Voltage
DTC P2245, P2249  Rear A/F Sensor (Bank 1, Sensor 1) VCENT Line Low Voltage; Front A/F Sensor (Bank 2, Sensor 1) VCENT Line Low Voltage
DTC P2251, P2254  Rear A/F Sensor (Bank 1, Sensor 1) VS Line High Voltage; Front A/F Sensor (Bank 2, Sensor 1) VS Line High Voltage
DTC P2252, P2255  Rear A/F Sensor (Bank 1, Sensor 1) VS Line Low Voltage; Front A/F Sensor (Bank 2, Sensor 1) VS Line Low Voltage
DTC P2270, P2271, P2272, P2273  Rear Secondary HO2S (Bank 1, Sensor 2) Circuit Signal Stuck Lean (2005-2006 models); Rear Secondary HO2S (Bank 1, Sensor 2) Circuit Signal Stuck Rich (2005-2006 models); Front Secondary HO2S (Bank 2, Sensor 2) Circuit Signal Stuck Lean (2005-2006 models); Front Secondary HO2S (Bank 2, Sensor 2) Circuit Signal Stuck Rich (2005-2006 models)
DTC P2610  PCM Internal Power Off Timer Performance Problem
DTC P2627, P2630  Rear A/F Sensor (Bank 1, Sensor 1) LABEL Circuit Low Voltage; Front A/F Sensor (Bank 2, Sensor 1) LABEL Circuit Low Voltage
DTC P2628, P2631  Rear A/F Sensor (Bank 1, Sensor 1) LABEL Circuit High Voltage; Front A/F Sensor (Bank 2, Sensor 1) LABEL Circuit High Voltage
DTC P2A00, P2A03  Rear A/F Sensor (Bank 1, Sensor 1) Range/Performance Problem; Front A/F Sensor (Bank 2, Sensor 1) Range/Performance Problem
DTC U0073  F-CAN Malfunction (Bus-off)
DTC U0114  F-CAN Malfunction (VTM-4 Control Unit-PCM)
DTC U0122  F-CAN Malfunction (VSA Modulator-Control Unit-PCM)
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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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