P1169

DTC P1169 Fuel System Rich During Decel Fuel Cut Off (Bank 2)




Circuit Description
The powertrain Control module (PCM) continuously monitors the heated oxygen sensor (HO2S) activity for 90 seconds after "closed loop" has been enabled. During the monitoring period the powertrain Control module (PCM) counts the number of times a rich to lean and response is indicated and adds the amount of time it look to complete all rich to lean transitions and lean to rich transitions.

This code detects if Bank2 sensor indicated rich exhaust while in Decel Fuel Cut Off (DFCO) for fuel Control sensors.

Conditions for setting the DTC
- No related DTCs.
- The engine coolant temperature is more than 60 °C (140 °F).
- Engine is operating in "closed loop" power enrichment mode for 3 seconds.
- While in "power enrichment" mode the oxygen sensor voltage remains more than 600 mV in DFCO.

Action Taken When the DTC Sets
- The PCM will not illuminate the malfunction malfunction indicator lamp (MIL).
- The PCM will store condition which were present when the DTC was set as Freeze Frame and in the Failure Records data.

Conditions for Clearing the MIL/DTC
- A history DTC P1169 will clear after 40 consecutive trip cycle during which the warm up cycles have occurred without a fault.
- DTC P1169 can be cleared using the Tech 2 "Clear Info" function or by disconnecting the PCM battery feed.

Diagnostic Aids
- Check for faulty fuel injectors and fuel pump.

Steps 1 - 2:

Steps 3 - 5:

Step 6:

Test Description