LT1 DTC Codes (Help)
Thread Starter
Registered User
Joined: Oct 2000
Posts: 381
From: Delta Quadrant (Toronto)
LT1 DTC Codes (Help)
Hi there,
I finally pull the car out after 2 ½ years of sleeping.
Had to replace brandnew battery because it was out warrantty
However MIL just went up
I read the codes
There were as follow
P1641
P1642
P0117
P0300
P01412
P1114
I was airing up the tire and I notice my Eng Temp went to 210 and Fan didn't come on.
It usally does at 170.
Any body can transalate what those Codes mean or shade some light
thanks
I finally pull the car out after 2 ½ years of sleeping.
Had to replace brandnew battery because it was out warrantty
However MIL just went up
I read the codes
There were as follow
P1641
P1642
P0117
P0300
P01412
P1114
I was airing up the tire and I notice my Eng Temp went to 210 and Fan didn't come on.
It usally does at 170.
Any body can transalate what those Codes mean or shade some light
thanks
Thread Starter
Registered User
Joined: Oct 2000
Posts: 381
From: Delta Quadrant (Toronto)
How Silly How I can forget that hee ee 
P1641 Fan Control (FC) relay 1 control circuit
P1642 Fan Control (FC) relay 2 and 3 control circuit
I above codes mean BAD Relay ? or could be Bad FAN motor or could be all the above ?
P0117 Engine Coolant Temperature (ECT) sensor circuit low voltage : Mean Bad Sensor ?
P0300 Engine misfire detected : I know this one heee ee
P1114 ????
P01412 ???
Bare this thing in mind car was setting for 2 ½ years
P1641 Fan Control (FC) relay 1 control circuit
P1642 Fan Control (FC) relay 2 and 3 control circuit
I above codes mean BAD Relay ? or could be Bad FAN motor or could be all the above ?
P0117 Engine Coolant Temperature (ECT) sensor circuit low voltage : Mean Bad Sensor ?
P0300 Engine misfire detected : I know this one heee ee
P1114 ????
P01412 ???
Bare this thing in mind car was setting for 2 ½ years
Thread Starter
Registered User
Joined: Oct 2000
Posts: 381
From: Delta Quadrant (Toronto)
It came back with
P0412
P1641===
*_ _==---- is fan control for Raditor I just do not know shall replace the relay?
P1642===
and P0412 P0412 - Secondary Air Injection (AIR) Solenoid Relay Control Circuit Bank 1
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
P1641 and P1642 are for the relay control circuits, not for the fan motors or power supply. Could be the relays, could be the wiring to the relays.
P0117 means there is a continuous short to ground on the coolant sensor circuit.
P1114. Shoebox's list appears to have "P0114" but its in the sequnce in the chart where P1114 would show up. Everything I have indicates its an intermittent low voltage on the coolant temp sensor.
P1412 is not in any of my lists or in Shoebox's.
P0117 means there is a continuous short to ground on the coolant sensor circuit.
P1114. Shoebox's list appears to have "P0114" but its in the sequnce in the chart where P1114 would show up. Everything I have indicates its an intermittent low voltage on the coolant temp sensor.
P1412 is not in any of my lists or in Shoebox's.
Thread Starter
Registered User
Joined: Oct 2000
Posts: 381
From: Delta Quadrant (Toronto)
Thread Starter
Registered User
Joined: Oct 2000
Posts: 381
From: Delta Quadrant (Toronto)
P1412... Codes are made from your scan tool which are both generic and manufacturer specific codes. What make is your scan tool?
INNOVA gives answers but not for chevy.. INNOVA
INNOVA gives answers but not for chevy.. INNOVA
Registered User
Joined: Dec 1969
Posts: 27,725
From: Little Rock, AR
P1641 and P1642 are for the relay control circuits, not for the fan motors or power supply. Could be the relays, could be the wiring to the relays.
P0117 means there is a continuous short to ground on the coolant sensor circuit.
P1114. Shoebox's list appears to have "P0114" but its in the sequnce in the chart where P1114 would show up. Everything I have indicates its an intermittent low voltage on the coolant temp sensor.
P1412 is not in any of my lists or in Shoebox's.
P0117 means there is a continuous short to ground on the coolant sensor circuit.
P1114. Shoebox's list appears to have "P0114" but its in the sequnce in the chart where P1114 would show up. Everything I have indicates its an intermittent low voltage on the coolant temp sensor.
P1412 is not in any of my lists or in Shoebox's.
Sorry. You try to proof read everything, but some things slip by. Items now corrected.
Registered User
Joined: Nov 2002
Posts: 371
From: Langley, BC Canada
That is weird, neither my manual from INNOVA or anywhere on the net says anything about that other then other vehicle producers.
P1412 Chrysler Cylinder 2 Reactivation Control Performance
P1412 Ford (EGR) Valve Frozen
P1412 Land Rover Secondary air system fault bank 1Drive cycle D:Signal implausible
P1412 Kia EGR Differential Pressure Sensor Signal Low
P1412 Mazda Exhaust Gas Recirculation Valve Frozen
**CHANGE** I think the code is acutally P0412 Generic Secondary Air Injection Switching Valve A Circuit
Correct?
P1412 Chrysler Cylinder 2 Reactivation Control Performance
P1412 Ford (EGR) Valve Frozen
P1412 Land Rover Secondary air system fault bank 1Drive cycle D:Signal implausible
P1412 Kia EGR Differential Pressure Sensor Signal Low
P1412 Mazda Exhaust Gas Recirculation Valve Frozen
**CHANGE** I think the code is acutally P0412 Generic Secondary Air Injection Switching Valve A Circuit
Correct?
Last edited by Oxygen454; Mar 18, 2008 at 10:30 PM.
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
I'm working from the GM online diagnostic charts, specific to the year and engine in the car, and there is no P1412, defintely no 5 digit P codes. I think he read his scanner wrong, since the 5-digit code mysteriously reappeared as P0412, which is for a fault in the AIR pump relay control circuit.