DTC P1164, P2A00: A/F Sensor (Sensor 1) Circuit Range/Performance Problem (2002-2003 models); A/F Sensor (Sensor 1) Circuit Range/Performance Problem (2004 model) Acura RSX I facelift

Note. Information marked with an asterisk (*) applies to 2002-2003 models. Information marked with double asterisk (**) applies to 2004 model.

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(ref-218783-S42639849702006021000000) ).
2. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on.
3. Check for a Temporary DTC with a scan tool or the HDS. Is Temporary DTC P1164 (P2A00)* indicated? YES - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(ref-218785-S07322977852006021000000) ). NO - Go to step 4.
4. Test-drive in D3 position (M/T in 3rd gear). Starting at 1,600 RPM, accelerate using wide open throttle for at least 5 seconds. Then decelerate for at least 5 seconds with the throttle completely closed until the readiness code or Temporary DTC P1164 comes on. Is Temporary DTC P1164 (P2A00)* Indicated? YES - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(ref-218785-S07322977852006021000000) ). NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at C101 (located under the right side of the dash), C401 (located under the left side of the dash), the A/F sensor relay, the A/F sensor (Sensor 1) and the ECM/PCM.