Blinking glow plug dash light & CEL code 0544

Art van Law

Veteran Member
Joined
Dec 14, 2010
Location
PVD, RI
TDI
2013 JSW
My JSW at 121,xxx miles required a new battery. In addition to replacing the battery w/ correct one from a VW dealership, I also replaced one of the license plate bulbs.

The restart after battery replacement was difficult, with several tries at cranking. After the fourth try, the engine caught and ran consistently. I didn't immediately drive the vehicle, but a day passed and I started to drive away. Upon starting I saw the CEL come on as well as the glow plug light start to blink. I drove for about 50 miles, then obtained this VCDS result. (Other than the initial starting "hesitancy," there was no further trouble starting.)

2 Faults Found:

001348 - Sensor 1 for Exhaust Temp Bank 1 (G235)
P0544 - 001 - Circuit Malfunction - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 194984 km
Time Indication: 0
Date: 2046.14.06
Time: 02:49:13

Freeze Frame:
RPM: 1587 /min
Speed: 95.0 km/h
Voltage: 14.36 V
Temperature: 76.5°C
Temperature: 930.0°C
Temperature: 210.0°C
Temperature: 222.0°C

001348 - Sensor 1 for Exhaust Temp Bank 1 (G235)
P0544 - 000 - Circuit Malfunction - MIL ON
Freeze Frame:
Fault Status: 11100000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 194984 km
Time Indication: 0
Date: 2046.14.06
Time: 02:49:18

Freeze Frame:
RPM: 1610 /min
Speed: 95.0 km/h
Voltage: 14.44 V
Temperature: 76.5°C
Temperature: 930.0°C
Temperature: 198.0°C
Temperature: 222.0°C

Readiness: 1 1 0 1 1

In order to obtain better access to the battery tie down bolt, I detached the large diameter tube, held in place with a large clamp. I believe the aft portion of that assembly contains the MAF sensor. Since the car was alright prior to the battery and license plate light change, was it something I dislodged that triggered the CEL, or is it just coincidental? What do you think my next move should be? Thanks, in advance.
 

Wilkins

Veteran Member
Joined
Aug 19, 2005
Location
British Columbia
TDI
05 Jetta Wagon 5sp, 10 Sportwagen 6MT
I had the same MIL after removing my exhaust. The G234 is the exhaust temperature sensor pre turbo. IIRC the sensor itself is located under the MAF on the exhaust manifold and the wiring runs to a block of three connectors on the firewall just above the battery. Again going from memory the three connectors are orange, brown and black. The orange is the upstream O2 sensor and I think the brown is the G234.
I n my case I had disconnected the G234 to get access to the O2 sensor connector and forgot to put it back so all I had to do was plug it in. Hopefully your issue is similar.
 

MrCypherr

Veteran Member
Joined
Sep 3, 2012
Location
Ontario
TDI
Mk6 Wagon
Ive seen those sensors go every now and then. So it could just be luck of the draw with when it came up. Its located on the back of the turbo in a kind of tight area with the DPF/Low EGR pipe in the way. Heres a picture of where it is. I believe there is a write up on here on how to get it out, As Ive always just removed the low egr pipe to gain access.
 

Art van Law

Veteran Member
Joined
Dec 14, 2010
Location
PVD, RI
TDI
2013 JSW
At my remedial & diagnostic limit. I've checked connections as best I could. At the point where I must defer to a guru, appt is on Monday.
 
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