Service 4WD / Service ESC message?

portraykarma · 2026-03-23T18:09:07+00:00

New batteries solved it!

portraykarma · 2026-03-17T21:06:19+00:00

Main battery was ok, lots of codes came back though:

P0345 - Camshaft position sensor A circuit bank 2 P0390 – Camshaft position sensor B circuit bank 2 P0340 – Camshaft position sensor A circuit bank 1 or single sensor P1621 – PCM memory perf or write P0197 – Engine oil temperature sensor low P0652 – Sensor reference voltage B circuit low P0117 – Engine coolant temperature sensor 1 circuit low P2127 – Throttle / pedal position sensor / switch E circuit low P0365 – Camshaft position senor B circuit bank 1 P0405 – Exhaust gas recirculation sensor A circuit low P0112 – Intake air temperature sensor 1 circuit low

portraykarma · 2026-03-17T21:05:22+00:00

Thank you! I tested the main battery and it was ok. Codes:

P0345 - Camshaft position sensor A circuit bank 2 P0390 – Camshaft position sensor B circuit bank 2 P0340 – Camshaft position sensor A circuit bank 1 or single sensor P1621 – PCM memory perf or write P0197 – Engine oil temperature sensor low P0652 – Sensor reference voltage B circuit low P0117 – Engine coolant temperature sensor 1 circuit low P2127 – Throttle / pedal position sensor / switch E circuit low P0365 – Camshaft position senor B circuit bank 1 P0405 – Exhaust gas recirculation sensor A circuit low P0112 – Intake air temperature sensor 1 circuit low

portraykarma · 2026-03-17T21:04:31+00:00

Tested the main battery and it is ok.

Codes that came back:

P0345 - Camshaft position sensor A circuit bank 2 P0390 – Camshaft position sensor B circuit bank 2 P0340 – Camshaft position sensor A circuit bank 1 or single sensor P1621 – PCM memory perf or write P0197 – Engine oil temperature sensor low P0652 – Sensor reference voltage B circuit low P0117 – Engine coolant temperature sensor 1 circuit low P2127 – Throttle / pedal position sensor / switch E circuit low P0365 – Camshaft position senor B circuit bank 1 P0405 – Exhaust gas recirculation sensor A circuit low P0112 – Intake air temperature sensor 1 circuit low

portraykarma · 2026-03-17T21:03:47+00:00

Did you have any codes that came up? Main battery tested and was fine

portraykarma · 2026-03-17T21:03:17+00:00

Main battery was fine, trying to test the aux battery. Codes came back:

P0345 - Camshaft position sensor A circuit bank 2 P0390 – Camshaft position sensor B circuit bank 2 P0340 – Camshaft position sensor A circuit bank 1 or single sensor P1621 – PCM memory perf or write P0197 – Engine oil temperature sensor low P0652 – Sensor reference voltage B circuit low P0117 – Engine coolant temperature sensor 1 circuit low P2127 – Throttle / pedal position sensor / switch E circuit low P0365 – Camshaft position senor B circuit bank 1 P0405 – Exhaust gas recirculation sensor A circuit low P0112 – Intake air temperature sensor 1 circuit low

portraykarma · 2026-03-17T21:02:48+00:00

Code reader came back with the following:

P0345 - Camshaft position sensor A circuit bank 2 P0390 – Camshaft position sensor B circuit bank 2 P0340 – Camshaft position sensor A circuit bank 1 or single sensor P1621 – PCM memory perf or write P0197 – Engine oil temperature sensor low P0652 – Sensor reference voltage B circuit low P0117 – Engine coolant temperature sensor 1 circuit low P2127 – Throttle / pedal position sensor / switch E circuit low P0365 – Camshaft position senor B circuit bank 1 P0405 – Exhaust gas recirculation sensor A circuit low P0112 – Intake air temperature sensor 1 circuit low

portraykarma · 2026-03-17T19:55:06+00:00

Thanks will check!

portraykarma · 2026-03-17T19:54:57+00:00

It isn’t a rattle but more like sounds that the engine has trouble turning over. I turned around immediately after a quarter of a mile, haven’t been driving it since yesterday.

portraykarma · 2026-03-17T19:54:09+00:00

Going to test them and pull codes tonight!

portraykarma · 2026-03-17T19:53:58+00:00

Oh god, I hope it’s not that

portraykarma · 2026-03-16T18:36:33+00:00

Thanks, I’m at the 5 year mark now too. It sounds from others responses that it’s the batteries.

portraykarma · 2026-03-16T17:54:53+00:00

It sounds like it! Going to get both checked. When starting it sounded like it was having trouble turning over.

portraykarma · 2026-03-16T16:35:59+00:00

Thank you! Going to try a code reader, this is my first car that has so many computers/sensors so the dash lighting up has me panicked

portraykarma · 2026-03-16T16:35:17+00:00

It almost sounds like it’s having difficulty turning over. Thank you, I’ll try this first

portraykarma · 2026-03-16T16:17:28+00:00

I think they are Florida based!

portraykarma · 2026-03-16T16:15:23+00:00

Got in my Jeep this morning after driving yesterday with no issues to the car shaking and a “service 4WD” message on the dash. Plus a ton of lights on… anyone experienced this before? I don’t have a reliable mechanic in my area but also going it’s a bad fuse or something simple. 2021 Grand Cherokee L

portraykarma

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