Getting a new code after getting Lady Liberty put back together- P0037. The manual and resources online were not especially helpful; Anybody got any ideas on this?

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Grid power- the one true essential

2005 Liberty CRD- ARP studs, Fumoto, Hayden FC, inline Tstat, ETechno 7v GP, Platinum P1, in-tank lift pump.
1983 Volvo D24T
1981 Volvo D24
Dodge Cummins TD
Case 580B
Mitsubishi MT180 diesel
Kubota BX25 diesel

That's strange the 06 FSM says P0037-O2 SENSOR 1/2 HEATER CIRCUIT LOW but I did not think the CRD had an O2 sensor. You might directly email Keith at GDE, he often replies on weekends.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

LMW,

Here is what I got from google search.

Possible causes

- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside the heated oxygen sensor connector can cause the heated oxygen sensor fuse to blow, which is a very common problem for this type codes. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors.

Help with this

When is the code detected?

The P0037 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

P0037 JEEP Description

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).

In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.

The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

Heated Oxygen Sensor Heater Circuit Diagram

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2006 Liberty Limited CRD, Deep Beryl Green, Yeti tune, Arp studs, new cams, rockers, lifters, TB. "Green Monster"
2005 Liberty Sport CRD, Deep Beryl Green, GDE Hot Tune, ARP studs. "Rocket"
1982 Fiat 124 Spider Convertible. "Fiona"

Are you able to clear the code?

There is not an O2 sensor on the Liberty CRD, it is a bogus code.

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Providers of wholly developed aftermarket solutions for the KJ CRD.
(248) 977 - 9531

When I had installed my HID's, I would get that code every time i turned them on. It was the voltage draw when the balasts would ignite the bulbs.

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05 CRD Limited
GDE Hot Tune
Samco CAC Hoses
OME 790 and Bilstein 916 up front
OME 948 and OME N132L in rear
245/75/16 Treadwright Warden A/T on Richard Cepek DC-2
Euro torque converter
Renegade roof lights
Pioneer Z110bt double din navi w/ reverse cam

I will clear it and see whether it comes back. Thanks everyone for the input!

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Grid power- the one true essential

2005 Liberty CRD- ARP studs, Fumoto, Hayden FC, inline Tstat, ETechno 7v GP, Platinum P1, in-tank lift pump.
1983 Volvo D24T
1981 Volvo D24
Dodge Cummins TD
Case 580B
Mitsubishi MT180 diesel
Kubota BX25 diesel