DTC P1167: A/F Sensor (Sensor 1) Heater System Malfunction (2000-2002 M/T models)

NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Reset the ECM with the HDS (see ECM RESET ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on.
Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1167 indicated?
1. YES - Go to step 4.
2. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM.
Turn the ignition switch OFF.
Disconnect the A/F sensor (Sensor 1) 8P connector.
Turn the ignition switch ON (II).
Measure voltage between A/F sensor (Sensor 1) 8P connector terminal No. 6 and body ground.

Fig 1: Measuring Voltage Between A/F Sensor (Sensor 1) 8P Connector Terminal No. 6 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there more than 5.0 V?
1. YES - Replace the A/F sensor (Sensor 1) (see A/F SENSOR REPLACEMENT .
2. NO - Go to step 8.
Measure voltage between ECM connector terminal D11 and body ground.

Fig 2: Measuring Voltage Between ECM Connector Terminal D11 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there more than 5.0 V?
1. YES - Repair open in the wire between the ECM (D11) and the A/F sensor (Sensor 1).
2. NO - Substitute a known-good ECM; 2000-2001 M/T models (see HOW TO SUBSTITUTE THE ECM FOR TESTING PURPOSES (2000-2001 M/T MODELS) ), 2002 M/T model (see ECM UPDATING AND SUBSTITUTION FOR TESTING-2002-2006 M/T MODELS AND CVT MODEL ), and recheck. If the symptom/indication goes away, replace the original ECM (see ECM REPLACEMENT ).