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My mr2 won't start and have code P1646 and PO860 how do I fix this problem

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1991 toyota mr2 reliability


You\'ra asking about a 22 year old vehicle. I wouldn\'t take that for free & certainly not pay for it. Get something newer. Any vehicle over 12 to 14 years old, isn\'t even worth working on, unless you have decades of experience & do all your own work.
If you know nothing about cars, you need something fairly new.

Mar 27, 2013 | 1991 Toyota MR2

1 Answer

2003 Mr2 spyder battery replacement


Battery-- you look in your owners manual for
battery Group (size) & Rating in CCA

The Battery & Alternator-- obviously need to be
tested at a repair shop-- unless you would like to
share your expertise with us here

You never asked a question You just asked if it was
whatever ?? What is ----a no turn or no start condition!!!

Dec 03, 2012 | 2003 Toyota MR2 Spyder

1 Answer

How do you clear codes for 2004 saturn ion


Clear the codes AFTER a repair was made & the light
stayed on ?

I would purchase an inexpensive $60.00 code reader &
use that.

If you start disconnecting batteries on every vehicle you
do or will own,then bad things happen.

The radio won't work,the car won't start,etc

If you have service manuals to learn your vehicles systems,
then you can eventually know what the results will be

Again,if you fixed nothing,then the light is going to stay on
or come back

Sep 18, 2012 | 2002 Dodge Dakota Club Cab

1 Answer

2003 Miata won't start. P340 code comes up. How


P0340 stands for Camshaft Position Sensor Circuit Malfunction proably cost maybe im getting 40 bucks

Sep 09, 2012 | Cars & Trucks

1 Answer

My car have the code p1111 and p1646,which is that?


p1111 is nothing just letting you know system is ready after codes had been previously cleared, p1646 is 02 Sensor Control Malfuntion Bank 1 Upstream. Possible causes for p1646 o2 sensor went bad,short circuit to ground, short circuit to voltage, or open circuit. Code p1646 bank 1 sensor 1 o2 sensor control malfunction. Bank 1 is the rear bank and sensor 1 is the upstream sensor which you can see if you look between the engine inlet manifold and the brake booster(LHD). It is screwed into the manifold and has the grey connector next to the booster. You can check power to the heater on the white with green stripe wire. Any other testing will require a scan tool with datalogging capabilities. There were some VINs around your year that had their wires for that sensor twisted up by a faulty tool in the factory but you should be able to see that sort of damage easily.

Jan 03, 2012 | 2003 Jaguar X-Type

1 Answer

How to repair the p1646


Looks like Lambda sensor fault,

Fault Code:- P1646 Indicates a Power-train fault


The fault is generally due to a problem in the Computer & Output Circuit area


Fault Description: ECM HO2 Sensor control malfunction -bank 1 upstream (1/1)

Action of ECM:- ECM Default:- HO1S 1/1 control circuit inhibited


After clearing the DTC, complete the Drive vehicle for 10 minutes
Check for a reoccurrence of fault DTC.


Possible Fault:- HO2 Sensor 1/1 heater failure HO2 Sensor 1/1 sensing circuit: short circuit to ground, short circuit to high voltage, open circuit ECM Failure

See http://www.bluejag.co.uk for more info

Aug 30, 2011 | 2002 Jaguar X-Type

1 Answer

I have both a P1111 and P1646, what are these and how do you fix them


You can check out all fault codes at http://www.bluejag.co.uk

looks like faulty Lamda sensor.


Fault Code:- P1646 Indicates a Power-train fault


The fault is generally due to a problem in the Computer & Output Circuit area


Fault Description: ECM HO2 Sensor control malfunction -bank 1 upstream (1/1)

Action of ECM:- ECM Default:- HO1S 1/1 control circuit inhibited


After clearing the DTC, complete the Drive vehicle for 10 minutes
Check for a reoccurrence of fault DTC.


Possible Fault:- HO2 Sensor 1/1 heater failure HO2 Sensor 1/1 sensing circuit: short circuit to ground, short circuit to high voltage, open circuit ECM Failure

Jun 01, 2011 | 2003 Jaguar X-Type

1 Answer

Management light on fault found is p1646 what


You can check out fault codes at http://www.bluejag.co.uk.
Looks like faulty Lamda Sensor.

Fault Code:- P1646 Indicates a Power-train fault


The fault is generally due to a problem in the Computer & Output Circuit area


Fault Description: ECM HO2 Sensor control malfunction -bank 1 upstream (1/1)

Action of ECM:- ECM Default:- HO1S 1/1 control circuit inhibited


After clearing the DTC, complete the Drive vehicle for 10 minutes
Check for a reoccurrence of fault DTC.


Possible Fault:- HO2 Sensor 1/1 heater failure HO2 Sensor 1/1 sensing circuit: short circuit to ground, short circuit to high voltage, open circuit ECM Failure

May 28, 2011 | 2003 Jaguar X-Type

1 Answer

X type fault codes p1111 & p1646 can you shed any light on them for me please ?


P1111 - System Pass
This is flagged after DTCs have been cleared, all engine management OBD diagnostic monitor drive cycles HAVE BEEN COMPLETED.

P1646 - Linear O2 Sensor Control Chip (Bank 1)
Its listed as either a faulty heated HO2 sensor ie lambda sensor (upstream bank 1) or a short (presuming the ECM is OK as no other codes)
Did you replace the right one... bank 1 is at the back of the V6, bank 2 is at the front so its the back one.

Hope this helps (remember to rate tis answer).

Jan 20, 2011 | 2002 Jaguar X-Type

2 Answers

Bad code p1646


P1646 - Evaporative Emission (EVAP) Vent Solenoid Control Circuit

Feb 19, 2009 | 2002 Jaguar X-Type

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