Tip & How-To about Jaguar X-Type

Testing Xtype O2 Sensor

Engine Fault light on
Diagnostic code P0036 P0037 or P0056 P0057

The diagnostic code refers to HO2S Heater Control Circuit and a likely open circuit. It could also be the supply fuse however the heaters of the O2 sensors are prone to go due to age 30-40Kmile +

A rough and ready check of the sensors:

The heater of these sensors can can be checked for continuity using a multimeter set to ohms.

Disconnect the sensor (Black connector). Bank 2 is at the front of the car, Bank 1 near the bulkhead.

On the sensor side connector measure across the two pins connected to the 2 black wires from the sensor.

A reading 5 ohms and below (nom 2.5) is good.

Equally a resistance below 2.5 ohm may indicate a short circuit, but this will also be indicated with a blown fuse.

See http://www.bluejag.co.uk/

You will need a 22mm spanner to remove Bank 2 sensor and a special tool to remove Bank 1 sensor



If possible remove the sensor and heat it using a hot air gun (paint remover or similar not a hair dryer) monitor the resistance of the heater to ensure that it dos not go open circuit at temperature.
While you have the sensor out

If you also measure across the other two wires using a multimeter set to mV you should see the output of the sensor rise towards 0.1 volt as it heats up.

These are not 100% tests but give a good indication

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1 Answer

Hi, I am getting Faulty codes P0036, P0056, P0141, P0161 in reference Bank 1 and Bank 2 for sensors 2 on 2003 CTS.I was told the sensors where changed but codes still appear?


If the sensors were replaced an DTC'S come back has to be a wiring problem or PCM ,
The ECM detects that the HO2S heater low control circuit voltage is between 2.6-4.6 volts when the heater is commanded OFF, indicating an open HO2S heater circuit.
Is the fuse open?
All four codes refer to the heating element circuit ! there is a relay in the under hood fuse box that supplies B+ voltage to the O2 sensor heating elements . I would change that or test the relay , videos on you tube on testing relays .
MAIN Relay
--
LO SPEED Relay, HI SPEED Relay, S/P FAN Relay, PRE O2 Fuse, IGN-1 Fuse, ECM Fuse, POST O2 Fuse, and INJ Fuse
Also check
POST O2 Fuse
10 A
HO2S Bank 1 Sensor 2 and HO2S Bank 2 Sensor 2
PRE O2 Fuse
10 A
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 and HO2S Bank 2 Sensor 1

Jul 23, 2016 | 2003 Cadillac CTS

1 Answer

engine trouble codes


Hi CJ-
For many years now, engine codes have been standardized throughout the automotive industry to ease in vehicle diagnostics-so these codes are the same regardless of the maker of your car.
I use a site "engine-codes.com", to look these up on line. This is an excellent site since it not explains the code, but also troubleshooting methods for mechanics to fix the problem. For ease of information, I have provided the links for the codes you listed.
It sounds as though you may have issues with your O2 (oxygen sensor) which monitors the combustion and emissions system in your car.
Though rates vary from shop to shop, this should not be a wallet busting repair if replacement is needed.
P0597 MINI Thermostat Heater Control Circuit Open P0036 HO2S Heater Control Circuit Bank 1 Sensor 2 P0037 HO2S Heater Control Circuit Low Bank 1 Sensor 2

Apr 01, 2014 | Mini Cooper Cars & Trucks

1 Answer

My check engine light has come on in my 2006 Pontiac G6 after 2 and a half years. What could possibly be wrong since I keep my car serviced and the guys had just told me that my car was in tip top shape?


P0016 - Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A
P0030 - Heated Oxygen Sensor (H02S) Heater Control Circuit Bank 1 Sensor 1
P0031 - Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 1 Sensor 1
P0032 - Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 1 Sensor 1
P0036 - Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2
P0037 - Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 1 Sensor 2
P0038 - Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 1 Sensor 2
P0050 - Heated Oxygen Sensor (HO2S) Heater Circuit Bank 2 Sensor 1
P0051 - Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 2 Sensor 1
P0052 - Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 2 Sensor 1
P0053 - HO2S Heater Resistance Bank 1 Sensor 1 (PCM)
P0054 - HO2S Heater Resistance Bank 1 Sensor 2 (PCM)
P0056 - Heated Oxygen Sensor (HO2S) Heater Circuit Bank 2 Sensor 2
P0057 - Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 2 Sensor 2
P0058 - Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 2 Sensor 2
P0068 - Throttle Body Airflow Performance (PCM)
P0100 - MAF Sensor Circuit Insufficient Activity

Jun 25, 2009 | 2006 Pontiac G6

2 Answers

2005 Neon engine light came on and stays on. Car drives okay. Has around 34,000 miles. No other problems


Take it to Autozone or Advanced auto and get an engine diagnostic and ask them to printout the results. Most times it's a sensor.

Jun 05, 2009 | 1996 Dodge Neon

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