P0113 and P0108 Fault Finding and Repair in Sadie’s Engine Bay

P0113 and P0108 Fault Finding and Repair in Sadie’s Engine Bay

The work has begun on Sadie. Some fault finding is being done using the ODB scanner. I was hoping it would be capable of clearing the airbag and traction control lights, which are illuminated on the dash.

ODB deployed. Several codes related to the prior low battery were checked and cleared. They are not coming back, excellent. However, two persisted.

P0113 [0x0113]
Intake air temperature (IAT) sensor - high input
Intake Air Temperature Sensor 1 Circuit High
Status: Confirmed
----------------------------
P0108 [0x0108]
Manifold absolute pressure (MAP) sensor/barometric pressure (BARO) sensor - high input
Manifold Absolute Pressure/Barometric Pressure Circuit High Input
Status: Confirmed

P0108 – was first to be looked at and the likely culprit being the TMAP sensor at the very front of the engine bay. I trusted my gut and ordered the very expensive… (£16 😂) part. And I was right to do so, a further inspection of the sensor revealed the waterproof gasket exposed to the elements as the sleeve it fits inside being totally missing and after removing it from the supercharger, the sensor itself was missing a significant amount of itself.

So once that arrives tomorrow it I’ll get fitted and hopefully clear some more codes.

The P0113 code may be a little trickier to diagnose, but I’m going to remove it and check it with the multimeter to see what reading it’s giving before cleaning it out and retrying it. If that fails, it’ll be replaced too. Then it’s time for MOT.

Next up was the airbag light, with no apparent crash damage or signs the airbags had gone off or been replaced. The logical next thing to look at for me was, probably another nod to the SRS system being baffled by the previous low battery, and maybe a loose or disconnected sensor.

Sure enough the cable below the drivers seat was swinging loose and not clipped into place properly. No apparent damage to it, but possibly been disconnected while the battery was still connected in the past.

As the ODB dongle failed to detect it was on, let alone clear it, I purchased a B800 airbag scan tool.

This worked straight out of the box (read clear plastic bag) and despite the somewhat chinglish spellings in the, admittedly very decent, instructions. It detected every airbag in the car was throwing an error. This could only be a good thing thought I, surely they couldn’t ALL be fucked.

I cleared the error codes and sure enough, it has cleared the errors and stayed off. Success. Let’s see if they stay off or not!

Time for a bath and the first wash revealed some more of the wrinkles and beauty marks this old doll has acquired over the years, but it still cleans up not too badly!

I also mentioned I 3D printed a cover for the Positive Terminal in the engine bay, not overly fussed on the finish of it so I may reprint it.  I chose a concentric pattern for the top of it, and I think it looks a bit naff. So may give it another go with some matt PLA I have rather than this PETG.

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