Miata 1990-1997

1.8L L4 VIN - Auto 1

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1.8L L4 VIN - Auto

Trouble Code: ABS-05



Brake Switch

Possible Causes:



Malfunction of related wiring harness
 

Trouble Code: ABS-11



RF ABS Wheel-Speed Sensor

Possible Causes:



Malfunction of ABS wheel-speed sensor(s)
 
Malfunction of related wiring harness
 

Trouble Code: ABS-12



LF ABS Wheel-Speed Sensor

Possible Causes:



Malfunction of ABS wheel-speed sensor(s)
 
Malfunction of related wiring harness
 

Trouble Code: ABS-13



RR ABS Weel-Speed Sensor

Possible Causes:



Malfunction of ABS wheel-speed sensor(s)
 
Malfunction of related wiring harness
 

Trouble Code: ABS-14



LR ABS Wheel-Speed Sensor

Possible Causes:



Malfunction of ABS wheel-speed sensor(s)
 
Malfunction of related wiring harness
 

Trouble Code: ABS-15



ABS Wheel-Speed Sensor, ABS Sensor Rotor

Possible Causes:



There are missing or damaged teeth on sensor rotor
 
ABS wheel-speed sensor improperly installed
 
HU inoperable due to low pressure
 
Different size tires are used
 

Trouble Code: ABS-22



RF Pressure Reduction Solenoid Valve

Possible Causes:



Malfunction of solenoid valve(s)
 
Malfunction of related wiring harness
 

Trouble Code: ABS-23



RF Pressure Retention Solenoid Valve

Possible Causes:



Malfunction of solenoid valve(s)
 
Malfunction of related wiring harness
 

Trouble Code: ABS-24



LF Pressure Reduction Solenoid Valve

Possible Causes:



Malfunction of solenoid valve(s)
 
Malfunction of related wiring harness
 

Trouble Code: ABS-25



LF Pressure Retention Solenoid Valve

Possible Causes:



Malfunction of solenoid valve(s)
 
Malfunction of related wiring harness
 

Trouble Code: ABS-26



Rear Pressure Reduction Solenoid Valve

Possible Causes:



Malfunction of solenoid valve(s)
 
Malfunction of related wiring harness
 

Trouble Code: ABS-27



Rear Pressure Retention Solenoid Valve

Possible Causes:



Malfunction of solenoid valve(s)
 
Malfunction of related wiring harness
 

Trouble Code: ABS-51



Valve Relay

Possible Causes:



Malfunction of valve relay
 
Malfunction of related wiring harness
 

Trouble Code: ABS-53



Valve Relay, ABS Motor

Possible Causes:



Malfunction of ABS motor
 
Malfunction of motor relay
 
Malfunction of related wiring harness
 

Trouble Code: ABS-61



ABS Control Module (CM)

Possible Causes:



Malfunction of ABS control module
 

Trouble Code: CCS-21



Cruise Control Switch (SET/COAST Switch)

Possible Causes:



Cruise control module malfunction
 
Cruise control switch (wiper lever) malfunction
 

Trouble Code: CCS-22



Cruise Control Switch (RESUME/ACCEL Switch)

Possible Causes:



Cruise control module malfunction
 

Trouble Code: CCS-31



Brake Switch

Possible Causes:



Burned STOP 15 A fuse
 
Cruise control module malfunction
 
Brake switch malfunction
 
Malfunction in wiring harness between STOP 15 A fuse and brake switch
 
Malfunction in wiring harness between cruise control module and brake switch
 

Trouble Code: CCS-35



Clutch Switch (AT: Transmission Range Switch)

Possible Causes:



Cruise control module malfunction
 
Clutch switch (AT: transmission range switch) malfunction
 
Malfunction in wiring harness between clutch switch (AT: transmission range switch) and ground
 
Malfunction in wiring harness between cruise control module and clutch switch (AT: transmission range switch)
 

Trouble Code: CCS-37



Vehicle Speed Sensor

Possible Causes:



Cruise control module malfunction
 
Instrument cluster malfunction
 
Malfunction in wiring harness between cruise control module and instrument cluster
 

Trouble Code: P0100



MAF or VAF Sensor Circuit Malfunction

Possible Causes:



MAF sensor signal circuit is open or shorted to ground
 
MAF sensor power circuit is open or the ground circuit is open
 
MAF sensor is damaged or has failed
 
PCM has failed
 
TSB SSP056 (2/02) contains a MAF sensor warranty (Protege)
 

Trouble Code: P0110



Intake Air Temperature Sensor

Possible Causes:



Harness and/or connectors:
 
- check for open or short
 
IAT sensor
 

Trouble Code: P0115



Engine Coolant Temperature Sensor

Possible Causes:



Harness and/or connectors
 
- check for open or short condition
 
ECT sensor
 

Trouble Code: P0120



Throttle Position Sensor

Possible Causes:



Harness and/or connectors
 
- check for open or short condition
 
TP sensor
 
Intake air leaks
 
Fuel injector(s)
 
CMP sensor
 
MAF sensor
 

Trouble Code: P0125



Excessive Time To Enter Closed Loop

Possible Causes:



Inspect for low coolant level or an incorrect coolant mixture
 
Check the operation of the thermostat (it may be stuck open)
 
ECT sensor signal circuit has high resistance
 
ECT sensor has failed
 

Trouble Code: P0130



HO2S-11 (Bank 1 Sensor 1) Circuit Malfunction

Possible Causes:



Air leaks in intake manifold, exhaust pipes or exhaust manifold
 
Fuel delivery system component has failed (i.e., a clogged fuel filter, dirty or restricted fuel injectors, low or high fuel pressure)
 
Base engine -mechanical- problem (low cylinder compression, incorrect camshaft timing, intake or exhaust manifold leaks)
 
HO2S is damaged or has failed
 
HO2S heater element has deteriorated or failed
 
PRC solenoid or Purge solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0135



HO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction

Possible Causes:



HO2S heater power circuit is open or heater ground circuit open
 
HO2S signal tracking (due to oil or moisture in the connector)
 
HO2S is damaged or has failed
 
PCM has failed
 

Trouble Code: P0141



HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction

Possible Causes:



HO2S heater power circuit is open or heater ground circuit open
 
HO2S signal tracking (due to oil or moisture in the connector)
 
HO2S is damaged or has failed
 
PCM has failed
 

Trouble Code: P0170



Adaptive Fuel Trim Too Rich or Too Lean (Bank 1)

Possible Causes:



Vehicle driven low on fuel or driven until it ran out of fuel
 
One or more injectors restricted or pressure regulator has failed
 
Fuel delivery system supplying too much or too little fuel during cruise or idle speed (weak fuel pump, dirty/leaking fuel injector)
 
Air leaks after the MAF sensor, or air leaks in the PCV system
 
Air leaks at the EGR gasket, or at the EGR valve diaphragm
 
Exhaust leaks before or near where the front HO2S is mounted
 
HO2S is contaminated, deteriorated or it has failed
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
 
Base engine -mechanical- fault affecting one or more cylinders
 

Trouble Code: P0325



Knock Sensor Malfunction

Possible Causes:



CKP sensor malfunction
 
Connector or terminal malfunction
 
CKP sensor is dirty
 
Open circuit between main relay terminal D and CKP sensor terminal A
 
Open circuit between CKP sensor terminal B and PCM terminal 2J
 
Open circuit between CKP sensor terminal C and body ground
 
Short to power circuit between CKP sensor terminal B and PCM terminal 2J
 
Short to ground circuit between main relay terminal D and CKP sensor terminal A
 
Short to ground circuit between CKP sensor terminal B and PCM terminal 2J
 
Crankshaft pulley malfunction
 

Trouble Code: P0339



CKP Sensor Circuit Intermittent

Possible Causes:



CKP sensor installed improperly
 
CKP sensor dirty
 
CKP sensor pulse wheel malfunction
 
Connector or terminal intermittent malfunction
 
CKP sensor malfunction or substandard performance
 

Trouble Code: P0400



EGR System Flow Malfunction

Possible Causes:



EGR boost solenoid control circuit is open or shorted to power
 
EGR boost solenoid control power circuit is open
 
EGR boost solenoid is damaged or has failed
 
EGR boost sensor is damaged or has failed
 
EGR valve assembly is leaking, damaged or has failed
 
EGR valve vacuum hose(s) lose, damaged or disconnected
 
Exhaust pipe to EGR boost sensor or solenoid leaking/plugged
 
PCM has failed
 

Trouble Code: P0404



EGR Valve Position Sensor Circuit Range/Performance

Possible Causes:



EGR boost solenoid control circuit is open or shorted to ground
 
EGR boost solenoid power circuit is open to the Main Relay
 
EGR boost solenoid is damaged or has failed
 
EGR boost sensor is damaged or has failed
 
EGR valve position sensor is damaged, stuck or has failed
 
EGR valve assembly is leaking, damaged or has failed
 
EGR valve vacuum hose(s) lose, damaged or disconnected
 
Exhaust pipe to EGR boost sensor or solenoid leaking/plugged
 
PCM has failed
 

Trouble Code: P0420



Catalyst System Efficiency below Threshold

Possible Causes:



Catalytic converter deterioration or malfunction
 
Exhaust gas leakage
 
Looseness of HO2S (front)
 
Looseness of HO2S (rear)
 
HO2S (front) malfunction
 

Trouble Code: P0470



Exhaust Pressure Sensor--Malfunction

Possible Causes:



EBP sensor signal circuit is open or shorted to ground
 
EBP sensor signal circuit is shorted to VREF (5v)
 
EBP sensor power circuit (VREF) is open from the PCM
 
EBP sensor is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0510



Closed Throttle Position Switch Circuit Malfunction

Possible Causes:



Closed throttle switch signal circuit is open or shorted to ground
 
Closed throttle switch signal circuit is shorted to system power
 
Closed throttle switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1170



HO2S (front) No Inversion

Possible Causes:



HO2S (front) malfunction
 
HO2S (front) heater malfunction
 
Fuel injector malfunction
 
Pressure regulator malfunction
 
Fuel pump malfunction
 
Fuel delivery hose clogging or leakage
 
Fuel filter clogging
 
Fuel return hose clogging or leakage
 
Air suction or leakage
 
PCV valve malfunction
 
Purge solenoid valve malfunction
 
Purge solenoid hoses are hooked up incorrectly.
 
Ignition coil malfunction
 
Insufficient compression
 
Engine malfunction
 

Trouble Code: P1195



EGR Boost Sensor Circuit Malfunction

Possible Causes:



EGRBS signal circuit is open (4.90v indicated)
 
EGRBS signal circuit is shorted to ground (0.10v indicated)
 
EGRBS ground circuit is open (4.90v indicated)
 
EGRBS vacuum hose is loose, damaged or clogged
 
EGRBS is damaged or has failed
 
PCM has failed
 

Trouble Code: P1250



Pressure Regulator Control Solenoid Circuit Malfunction

Possible Causes:



PRC solenoid control circuit is open
 
PRC solenoid control circuit is shorted to ground
 
Fuel pump relay power circuit is open
 
PCM has failed
 

Trouble Code: P1345



CMP Sensor Circuit Malfunction

Possible Causes:



CMP sensor malfunction
 
Connector or terminal malfunction
 
CMP sensor is dirty.
 
Open circuit between main relay terminal D and CMP sensor terminal A
 
Open circuit between CMP sensor terminal B and PCM terminal 3V
 
Open circuit between CMP sensor terminal C and body GND
 
Short to GND circuit between main relay terminal D and CMP sensor terminal A
 
Short to GND circuit between CMP sensor terminal B and PCM terminal 3V
 
CKP sensor malfunction
 

 
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