Those codes are all pointing at a related issue. A/F ratio falling out of range, heater elements within the O2's out of temp range, EGR sensor or exhaust gas temp falling out of range, etc. There is a few areas to consider...
Was any work recently done to the car that may have triggered this? When was the last time you replaced the O2 sensors? Check the O2 connectors and wiring to make sure one of them hasn't contacted the exhaust or melted. Any exhaust leaks especially before the cats? When was the last time you performed an induction service and cleaned the intake, TBs, IAC, etc? The EGR and IACV love to get carbon buildup over the years and can affect flow, similarly can happen to the vac lines to the factory wastegate control solenoid. You mentioned the car felt like it was still running well, so no idle RPM fumbling, hanging, stumbling, etc? Are you running an aftermarket boost control solenoid or OEM? Sorry for the load of questions, but need a bit more to go off of to help point you in the right direction.
Even though the vehicle has considerable low mileage, it's still 30 years old. If it's kept in a garage it tends to handle the elements better than sitting out in the external environmental conditions and will need more routine maintenance and care regardless if it's being driven or not. (i.e. 60K / 120k maint w/ timing belt)
By
protoj ·
Proof of what can happen if a wife or girlfriend drags her husband or
> boyfriend along shopping
> This letter was recently sent by Tesco's Head Office to a customer in
> Oxford:
>
> Dear Mrs. Murray,
>
> While we thank you for your valued custom and use of the Tesco Loyalty
> Card, the Manager of our store in Banbury is considering banning you
and
> your family from shopping with us, unless your husband stops his
antics.
> Below is a list of offences over the past few months all verified by
our
> surveillance cameras:
>
> 1. June 15: Took 24 boxes of condoms and randomly put them in people's
> trolleys when they weren't looking.
>
> 2. July 2: Set all the alarm clocks in Housewares to go off at
5-minute
> intervals.
>
> 3. July 7: Made a trail of tomato juice on the floor leading to
feminine
> products aisle.
>
> 4. July 19: Walked up to an employee and told her in an official tone,
> "Code 3" in housewares..... and watched what happened.
>
> 5. August 14: Moved a 'CAUTION - WET FLOOR' sign to a carpeted area.
>
> 6. September 15: Set up a tent in the outdoor clothing department and
told
> shoppers he'd invite them in if they would bring sausages and a Calor
gas
> stove.
>
> 7. September 23: When the Deputy Manager asked if she could help him,
he
> began to cry and asked, "Why can't you people just leave me alone?"
>
> 8. October 4: Looked right into the security camera; used it as a
mirror,
> picked his nose, and ate it.
>
> 9. November 10: While appearing to be choosing kitchen knives in the
> Housewares aisle asked an assistant if he knew where the
antidepressants
> were.
>
> 10. December 3: Darted around the store suspiciously, loudly humming
the
> "Mission Impossible" theme.
>
> 11. December 6: In the kitchenware aisle, practised the "Madonna look"
> using different size funnels.
>
> 12. December 18: Hid in a clothing rack and when people browsed,
yelled
> "PICK ME!" "PICK ME!"
>
> 13. December 21: When an announcement came over the loud speaker,
assumed
> the foetal position and screamed "NO! NO! It's those voices again."
>
> And; last, but not least:
>
> 14. December 23: Went into a fitting room, shut the door, waited a
while;
> then yelled, very loudly, "There is no toilet paper in here."
>
> Yours sincerely,
>
Edward Thompson - Manager
:rofl: :rofl: :rofl: