By BAT Team (Contact Me)
Last Updated 2017-01-17
A site with free advice from mechanics.

We recommend Torque Pro

Manufacturer Specific Definitions for P1138

MakeFault Location
AudiLong term fuel trim, idling, Bank 2 - system too lean
BmwKnock Sensor 4 High Input
BuickHeated oxygen sensor (H02S) 2 -signal above threshold (rich)
CadillacHeated oxygen sensor (H02S) 2, bank 1 voltage high
ChevroletHeated oxygen sensor (H02S) 2, bank 1 voltage high
CitroenLack Of HO2S12 Switch - Sensor Indicates Rich
FordLack Of HO2S Switches Bank 1 Sensor 2 Rich
GmcHeated oxygen sensor (H02S) 2, bank 1 voltage high
GmHO2S Bank 1 Sensor 2 Rich or High Voltage
InfinitiSwirl Control Valve Control System Performance
IsuzuHeated oxygen sensor (H02S) 2 – voltage high
JaguarHeated oxygen sensor (HO2S) cylinders 1, 2, 3 - indicates rich
KenworthP1138 - WRAF heater CJ125 undervoltage fault
Land RoverHeated oxygen sensor (H02S) 2 -cylinders 1,   2, 3 – mixture rich
LincolnHeated oxygen sensor (H02S) 2, bank 1 -not switching, fuel trim (FT) rich mixture
MazdaHeated oxygen sensor (H02S) – rear- adaptive limit achieved
Mercedes-BenzHeated oxygen sensor (H02S) 2 – range/   performance problem
MercuryHeated oxygen sensor (H02S) 2, bank 1 not switching·, fuel trim (FT) rich mixture
MiniO2 Sensor Heater Circuit Low Voltage Bank 1 Sensor 2
NissanIntake manifold air control solenoid – circuit malfunction
OldsmobileHeated oxygen sensor (H02S) 2 -voltage high
PeterbiltP1138 - WRAF heater CJ125 undervoltage fault
PeugeotLack Of HO2S12 Switch - Sensor Indicates Rich
PontiacHeated oxygen sensor (H02S) 2, bank 1 voltagehigh
PorscheOxygen Sensing
SaabHeated oxygen sensor (H02S) 2, bank 1 – voltage high
SaturnHeated oxygen sensor (H02S) 2, bank 1 voltage high
SuzukiHO2S Circuit High Voltage During Decel Fuel Cut-Off Sensor 2
VolvoHeated oxygen sensor (H02S) 1, bank 2- rich
VolkswagenLong term fuel trim, idling, system too lean

Help Us Help You

We have not gotten around to publishing a technical guide specifically for P1138 yet. To escalate the priority of this guide in our production queue, we appreciate a $9.99 donation. We will publish a guide within 30 days of payment.