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Engine codes P0597

What does this code mean P0597 ;Thermostat heater control circuit open

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SOURCE: Check Engine code P1409

clean the egr valve port on intake use piece of clothes rack clean the built up carbon on inside of port.

Posted on May 20, 2009

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SOURCE: ford focus p2008 engine code??

Check pcv hose from the manifold to pipe. It will get soft and collapse, leak. It will turn light on. Check while running.

Posted on Feb 17, 2010

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SOURCE: Engine light stays on. Checked for codes. Code

or a bad electrical connection to that injector

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SOURCE: i have a 94 ford f150 i took it by autozone and

You need to replace the transmission shift control solenoid on the transmission, when theres a problem you may experience hard shifts, not shifting into OD. Part cost between $30-70.

Posted on Feb 19, 2011

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I have a Opel Astra H 1.8l sport 2006. The power steering was refurbished and installed (works fine). I drove the vehicle home for about 12kms, the was no power from gear 2 and 3. The vvehicle was very...


Definition of check engine code P0335:
Generic (Common for all car manufacturers):
Crankshaft position (CKP) sensor - circuit malfunction Definition of check engine code P0597:
Generic (Common for all car manufacturers):
Thermostat Heater Control Circuit/Open

Odd codes. Check the wiring loom from the engine.

Nov 02, 2017 | Opel Cars & Trucks

1 Answer

I got a p0597 code on my 2012 bmw 328i


That is a code for the electronically controlled engine thermostat. Have checked asap before you do very expensive damage to your engine.

Jul 26, 2016 | 2012 BMW 3 Series 328i Sedan 2.0L 4-cyl....

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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

P0597 code


P0597 Thermostat Heater Control Circuit/Open


Circuit/System Description

The engine control module (ECM) controls the pulse width modulated (PWM) thermostat. The thermostat controls coolant flow and regulates the engine operating temperature. Ignition voltage is supplied directly to the thermostat. The ECM controls the thermostat by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

Aug 25, 2013 | 2009 Pontiac G3

2 Answers

What code mean po302,,,,po135...p1705


P0302 TOYOTA - Cylinder 2 Misfire Detectedxicon.jpghttp://engine-codes.com/p0302_toyota.htmlForum CodePossible causes- Faulty spark plug 2
- Faulty ignition coil 2
- Ignition coil 2 harness is open or shorted
- Ignition coil 2 poor electrical connection
- Clogged or faulty fuel injector 2
- Injector 2 harness is open or shorted
- Injector 2 poor electrical connection
- Improper spark plug 2
- Insufficient cylinder 2 compression
- Incorrect fuel pressure
- Intake air leak
P0135 - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1xicon.jpghttp://engine-codes.com/p0135.htmlForum CodePossible causes- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
- Faulty Engine Control Module (ECM)
Tech notes The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The Engine Control Module (ECM) monitors how long it take the sensor to warm up and start sending an adequate signal. The code means the the sensor is taking too long to warm up. Replacing the O2 Sensor 1 usually takes care of the problem
P1705 TOYOTA - Direct Clutch Speed Sensor Circuit Fault.
This is related to the sensor that gives info about the slippage rate o fthe transmisssion to the Transmission Control Module..

Jul 15, 2012 | 1996 Toyota Camry

1 Answer

'01 Sequoia throwing 2 OBD II codes: po125 & po135. replace pre-cat o2 sensor?


DTC P0125 OBD-II - Insufficient Coolant Temperature For Closed Loop Fuel Control
This means that the engine coolant temperature (ECT) sensor indicates that the engine has not reached the required temperature level to enter closed-loop operation within a specified amount of time after starting the engine. You will likely not notice any drivability problems.

A code P0125 may mean that one or more of the following has happened:
Insufficient warm up time
Low engine coolant level
Leaking or stuck open thermostat
Faulty coolant temperature sensor


DTC P0135 OBD-II - Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
This code refers to the front oxygen sensor on Bank 1. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0135. You will likely notice poor fuel economy the illumination of the MIL.

A code P0135 may mean that one or more of the following has happened:
O2 Heater element resistance is high
Internal short or open in the heater element
O2 heater circuit wiring high resistance
open or short to ground in the wiring harness


For additional details, feel free to contact us in the preivous code link.

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Thank you for using Fixya, and have a nice day.

Oct 12, 2011 | 2001 Toyota Sequoia

1 Answer

I have a 2006 bmw 325i 3.0L E90. Car has been overheating and got a code of P0597 Thermostat Heater control circuit open. I replaced the thermostat with a new aluminum Wahler unit. Just drovve it for 10...


IT sounds like heater control valve not thermostat. Check Pelican Parts.com or BavAuto.com for tech advise & tips. Also check RealOem.com (enter your cars specs and you will see exploded diagrams)

Apr 04, 2011 | BMW 325 Cars & Trucks

1 Answer

My check engine light is on and I received code P1135, Manufacturer Control Fuel Air Metering is the defintion of the code. What parts do I need to get to fix problem myself?


Not sure where you got that definition for that code but this is what it is and means with possible causes for whichever motor you have:

Trouble Code: P1135 (2.4L L4 VIN - Auto)
A/F Sensor-11 (Bank 1 Sensor 1) Heater Circuit Malfunction Print this code dataprint_icon_codes.gif
Number of Trips to Set Code: 2
OBD II Monitor Type: CCM Details
Indicators: MIL Details
Trouble Code Conditions:
Engine started, engine running, and the PCM detected the A/F Sensor-11 (A/FS-11) heater current was less than 0.25A, or that it was more than 8.0A at anytime during the CCM test.

Possible Causes:
  • A/F sensor heater circuit or ground circuit is open
  • A/F sensor heater power circuit is open
  • A/F sensor heater is damaged or has failed
  • PCM has failed

2001 Toyota Highlander - I4 - P1135, P1155


Trouble Code: P1135 (3.0L V6 VIN - Auto)
A/F Sensor-11 (Bank 1 Sensor 1) Heater Circuit Malfunction Print this code dataprint_icon_codes.gif
Number of Trips to Set Code: 2
OBD II Monitor Type: CCM Details
Indicators: MIL Details
Trouble Code Conditions:
Engine started, engine running, and the PCM detected the A/F Sensor-11 (A/FS-11) heater current was less than 0.25A, or that it was more than 8.0A at anytime during the CCM test.

Possible Causes:
  • A/F sensor heater circuit or ground circuit is open
  • A/F sensor heater power circuit is open
  • A/F sensor heater is damaged or has failed
  • PCM has failed

2001 Toyota Highlander - V6 - P1135

Oct 21, 2009 | 2001 Toyota Highlander

1 Answer

Trouble codes p0597 and p0015 what they mean


po597 did not see poo15 is camshaft b position timing over retarded or performance problem bank 1. have pcm check sound like its in limp mode.

May 29, 2009 | 2006 BMW 3 Series

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