DTC P0134: A/F Sensor (Sensor 1) No Activity Detected Honda Civic VII рестайлинг

Note. If the vehicle was out of fuel and the engine stalled before this DTC was stored, refuel and clear the DTC with the HDS.

If P0135 is stored at the same time as DTC P0134, troubleshoot DTC P0135 first, then recheck for DTC P0134.

1. Check the installation of the A/F sensor (Sensor 1). Is it slacked from the exhaust pipe? YES: Reinstall the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(ref-172003-S39467887942005021700000) ). NO: Go to step 2.
2. Reset the ECM (see «HOW TO RESET THE ECM»(ref-171994-S27513286122005021700000) ).
3. Start the engine. Hold the engine speed at 3,000 RPM with no load (in neutral) until the radiator fan comes on, then let it idle for 2 minute. Is DTC P0134 indicated? YES: Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(ref-172003-S39467887942005021700000) ). 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.

Scheme 33

1. Reset the ECM (see «HOW TO RESET THE ECM»(ref-171994-S27513286122005021700000) ).
2. Start the engine. Hold the engine at 3,000 RPM with no load (in neutral) until the radiator fan comes on.
3. Check the secondary HO2S (Sensor 2) output voltage at 3,000 RPM with the HDS or a scan tool. Is there 0.3 V or less? YES: Go to step 4. NO: Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and at the ECM.
4. Turn the ignition switch OFF.
5. Disconnect the secondary HO2S (Sensor 2) 4P connector.
6. Turn the ignition switch ON (II).
7. Check the secondary HO2S (Sensor 2) output voltage with the HDS or a scan tool. Is there 0.3 V or less? YES: Go to step 8. NO: Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(ref-172003-S39467887942005021700000) ).
8. Turn the ignition switch OFF.
9. Disconnect ECM connector E (31P).
10. Check for continuity between the secondary HO2S (Sensor 2) 4P connector terminal No.2 and body ground. Is there continuity? YES: Repair short in the wire between the ECM (E2) and the secondary HO2S (Sensor 2). NO: Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck (see «ECM UPDATING AND SUBSTITUTION FOR TESTING»(ref-171994-S19233909092005021700000) ). If the symptom/indication goes away with a known-good ECM, replace the original ECM.

Scheme 34

Scheme 35

1. Reset the ECM (see «HOW TO RESET THE ECM»(ref-171994-S27513286122005021700000) ).
2. Start the engine. Hold the engine at 3,000 RPM with no load (in neutral) until the radiator fan comes on.
3. Check the secondary HO2S (Sensor 2) output voltage at 3,000 RPM with the HDS or a scan tool. Is there 1.0 V or more? YES: Go to step 4. NO: Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and at the ECM.
4. Turn the ignition switch OFF.
5. Disconnect the secondary HO2S (Sensor 2) 4P connector.
6. Connect secondary HO2S (Sensor 2) 4P connector terminals No.1 and No.2 with a jumper wire.
7. Turn the ignition switch ON (II).
8. Check the secondary HO2S (Sensor 2) output voltage with the scan tool. Is there 1.0 V or more? YES: Go to step 9. NO: Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(ref-172003-S39467887942005021700000) ).
9. Turn the ignition switch OFF.
10. Connect ECM connector terminals E2 and E4 with a jumper wire.
11. Turn the ignition switch ON (II).
12. Check the secondary HO2S (Sensor 2) output voltage with the HDS or a scan tool. Is there 1.0 V or more? YES: Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck (see «ECM UPDATING AND SUBSTITUTION FOR TESTING»(ref-171994-S19233909092005021700000) ). If the symptom/indication goes away with a known-good ECM, replace the original ECM. NO: Repair open in the wire between the ECM (E2, E4) and the secondary HO2S (Sensor 2).