Acura CL Integra NSX RL RSX TL TSX 2001-2006

TroubleCodes (3 of 15)

Print

1.8L L4 - Std



1.8L L4 - Std

Trouble Code: P0107

Manifold Air Pressure Sensor Circuit Low Input

Trouble Code Conditions: Engine started, engine running in closed loop at idle speed, and the PCM detected the MAP sensor indicated a value of 0.0" Hg during the CCM test. Note: The key on, engine off MAP sensor input should be near 2.9v.

Possible Causes:



MAP sensor 5-volt power circuit open or shorted to ground
 
MAP Sensor signal circuit is shorted to ground
 
MAP Sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0108

Manifold Air Pressure Sensor Circuit High Input

Trouble Code Conditions: Engine started, engine running in closed loop at idle speed, and the PCM detected the MAP sensor indicated a value of 29.9" Hg during the CCM test. Note: The key on, engine off MAP sensor input should be near 2.9v.

Possible Causes:



MAP sensor signal circuit is open, or the ground circuit is open
 
MAP sensor signal circuit shorted to 5v VREF or system power
 
MAP sensor is damaged (due to an open circuit) or has failed
 
PCM has failed
 

Trouble Code: P0112

Intake Air Temperature Sensor Circuit Low Input

Trouble Code Conditions: Key on or engine running; and the PCM detected the Intake Air Temperature (IAT) sensor signal indicated less than 0.1v (Scan Tool reads 302ºF) during the CCM test.

Possible Causes:



IAT sensor signal shorted to chassis ground
 
IAT sensor signal shorted to sensor ground circuit
 
IAT sensor has an internal failure (it is shorted) or has failed
 
PCM has failed
 

Trouble Code: P0113

Intake Air Temperature Sensor Circuit High Input

Trouble Code Conditions: Key on or engine running; and the PCM detected the Intake Air Temperature (IAT) sensor signal indicated more than 4.90v (Scan Tool reads -4ºF) during the CCM test.

Possible Causes:



IAT sensor signal shorted to VREF or system power
 
IAT sensor signal circuit is open
 
IAT sensor ground circuit is open
 
Sensor has an internal failure (it is open)
 
PCM has failed
 

Trouble Code: P0116

Engine Coolant Temperature Sensor Range/Performance

Trouble Code Conditions: DTC P0116 and P0117 not set, Engine started, and the PCM detected too much change in the ECT sensor signal in too short a period of time during the CCM Rationality test. Note: The ECT sensor should read 0.47v-0.78v at hot idle speed.

Possible Causes:



ECT sensor ground circuit is open (fault may be intermittent)
 
ECT sensor signal circuit is open (fault may be intermittent)
 
ECT sensor is damaged or has failed (fault may be intermittent)
 
PCM has failed
 

Trouble Code: P0117

Engine Coolant Temperature Sensor Circuit Low Input

Trouble Code Conditions: Key on or engine running; and the PCM detected the Engine Coolant Temperature (ECT) sensor indicated less than 0.10v (Scan Tool reads more than 302ºF) during the CCM test. Note: The ECT sensor should read 0.47v-0.78v at hot idle speed.

Possible Causes:



ECT sensor signal is shorted to chassis ground
 
ECT sensor signal is shorted to sensor ground circuit
 
ECT sensor is damaged or has failed (it is shorted internally)
 
PCM has failed
 

Trouble Code: P0118

Engine Coolant Temperature Sensor Circuit High Input

Trouble Code Conditions: Key on or engine running; and the PCM detected the Engine Coolant Temperature (ECT) sensor indicated more than 4.90v (Scan Tool reads less than -4ºF) during the CCM test. Note: The ECT sensor should read 0.47v-0.78v at hot idle speed.

Possible Causes:



ECT sensor signal circuit is open between the sensor and PCM
 
ECT sensor signal circuit is shorted to VREF or system power
 
ECT sensor signal circuit is open between sensor and the PCM
 
ECT sensor is damaged or has failed (it is open internally)
 
PCM has failed
 

Trouble Code: P0122

Throttle Position Sensor Circuit Low Input

Trouble Code Conditions: Engine started, engine running in closed loop at idle speed, and the PCM detected the TP signal indicated less than 0.16v (Scan Tool reads less than 10%) during the CCM test.

Possible Causes:



TP sensor signal circuit is shorted to ground
 
TP sensor VREF circuit is open
 
TP sensor VREF circuit is shorted to ground
 
TP sensor is damaged (it may be shorted internally)
 
PCM has failed
 

Trouble Code: P0123

Throttle Position Sensor Circuit High Input

Trouble Code Conditions: Engine started, engine running under a momentary WOT condition, and the PCM detected the TP signal was more than 4.60v (Scan Tool reads more than 90%) during the CCM test.

Possible Causes:



TP sensor signal circuit is shorted to VREF
 
TP sensor signal circuit is shorted to system power
 
TP sensor ground circuit is open between sensor and the PCM
 
TP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0131

HO2S-11 (Bank 1 Sensor 1) Circuit Low Input

Trouble Code Conditions: Engine started, vehicle driven in closed loop in 4th gear at cruise speed, and the PCM detected the HO2S signal was fixed at less than 0.50v (the actual value is stored in the PCM memory).

Possible Causes:



HO2S signal circuit is open or it is shorted to ground
 
HO2S may be contaminated or may have failed
 
Fuel supply system is too lean (fuel filter is clogged or dirty)
 
PCM has failed
 

Trouble Code: P0132

HO2S-11 (Bank 1 Sensor 1) Circuit High Input

Trouble Code Conditions: Engine started, vehicle driven in D4 or D5 position, or in 4th gear in closed loop at cruise speed, and the PCM detected the HO2S signal was fixed at more than 0.90v (the actual value is stored in the PCM).

Possible Causes:



HO2S signal tracking (wet/oily) in connector causing a short between the signal circuit and the heater power circuit (B+)
 
HO2S ground circuit is open between the sensor and ground
 
HO2S heater supply circuit is open
 
PCM has failed
 
TSB 01-025 (10/29/01) contains a repair procedure for this code
 

Trouble Code: P0133

HO2S-11 (Bank 1 Sensor 1) Circuit Slow Response

Trouble Code Conditions: Engine started, vehicle driven in closed loop in 4th or 6th gear at over 55 mph at steady speed, and the PCM detected the HO2S response time to switch between 300-600 mv was too slow, or that the rich to lean or lean to rich switch time was too slow.

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
O2S element fuel contamination
 
O2S element has deteriorated
 
PCM has failed
 

Trouble Code: P0135

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

Trouble Code Conditions: Engine started, engine runtime over 80 seconds, and the PCM detected an unexpected voltage condition on the HO2S heater circuit during the CCM test.

Possible Causes:



Main relay output (power) circuit to the heater is open
 
O2S heater ground circuit is open
 
O2S heater element has high resistance or an open circuit
 
O2S heater element has a shorted condition
 
PCM has failed
 

Trouble Code: P0137

HO2S-12 (Bank 1 Sensor 2) Circuit Low Input

Trouble Code Conditions: Engine started, vehicle driven in 4th gear at cruise speed, and the PCM detected the HO2S signal was fixed at less than 0.30v. Note: The actual value where the code sets is in the PCM memory.

Possible Causes:



HO2S signal circuit is open
 
HO2S signal circuit is shorted to ground
 
HO2S ground circuit is open
 
HO2S may be contaminated or may have failed
 
PCM has failed
 

Trouble Code: P0138

HO2S-12 (Bank 1 Sensor 2) Circuit High Input

Trouble Code Conditions: Engine started, vehicle driven in closed loop in 4th gear at cruise speed, and the PCM detected the HO2S signal was fixed at more than 0.60v. Note: The actual value where the code sets is in the PCM memory.

Possible Causes:



HO2S signal tracking (wet/oily) in connector causing a short between the signal circuit and heater power circuit
 
HO2S signal circuit is shorted to system power
 
HO2S heater supply circuit is open
 
PCM has failed
 

Trouble Code: P0139

HO2S-12 (Bank 1 Sensor 2) Circuit Slow Response

Trouble Code Conditions: Engine started, vehicle driven in closed loop in 4th or 6th gear at over 55 mph at steady speed, and the PCM detected the HO2S response time to switch between 300-600 mv was too slow, or that the rich to lean or lean to rich switch time was too slow.

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
HO2S element fuel contamination
 
HO2S element has deteriorated
 
PCM has failed
 

Trouble Code: P0141

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

Trouble Code Conditions: Engine started, engine runtime over 80 seconds, and the PCM detected an unexpected voltage condition on the HO2S heater circuit during the CCM test.

Possible Causes:



Main relay output (power) circuit to the heater is open
 
O2S heater ground circuit is open
 
O2S heater element has high resistance or an open circuit
 
O2S heater element has a shorted condition
 
PCM has failed
 

Trouble Code: P0171

Fuel System Too Lean (Bank 1)

Trouble Code Conditions: DTC P0107, P0108, P0135, P0137, P0138, P0141, P1128, P1129 and P1259 not set, engine running in closed loop, and the PCM detected the LONGFT value exceeded the calibrated lean limit value.

Possible Causes:



Air leaks in intake manifold, exhaust pipes or exhaust manifold
 
One or more injectors restricted or pressure regulator has failed
 
Air is being drawn in from leaks in gaskets or other seals
 
O2S element is deteriorated or has failed
 
A "fuel control" sensor is out of calibration (ECT, IAT or MAP)
 
PCM has failed
 

Trouble Code: P0172

Fuel System Too Rich (Bank 1)

Trouble Code Conditions: DTC P0107, P0108, P0135, P0137, P0138, P0141, P1128, P1129 and P1259 not set, engine running in closed loop, and the PCM detected the LONGFT value exceeded the calibrated rich limit. Note: A high MAP sensor signal at idle can cause this code to set.

Possible Causes:



Base engine fault (i.e., cam timing incorrect, oil level too high)
 
EVAP vapor recovery system has failed (pulling vacuum)
 
HO2S element may be contaminated with water or alcohol
 
Leaking/contaminated fuel injector(s) or fuel pressure regulator
 
Partial engine misfire condition is present
 

Trouble Code: P0300

Multiple Misfire Detected

Trouble Code Conditions: DTC P0101-P0103, P0171, P0172, P0401, P1102, P1103, P1361, P1362, P1381, P1382, P1491, P1498 and P1508 not set, engine running under positive torque conditions, and the PCM detected a misfire in only one cylinder (MIL will flash if the misfire is severe).

Possible Causes:



Base engine mechanical fault affecting more than 1 cylinder
 
CKP or CMP sensor problem affecting more than one cylinder
 
Fuel system problem affecting more than one cylinder
 
Ignition system problem affecting more than one cylinder
 

Trouble Code: P0301

Cylinder 1 Misfire Detected

Trouble Code Conditions: DTC P0107, P0108, P0131, P0132, P0171, P0172, P1128, P0335, P0336, P0505, P1128, P1129, P1259, P1361, P1362, P1366, P1367 and P1519 not set, engine running under positive torque conditions, and the PCM detected a misfire condition in one cylinder. Note: If the misfire is severe, the MIL will flash on/off on the 1st trip!

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine (mechanical) problem affecting only one cylinder
 
Fuel system problem affecting only one cylinder
 
Ignition problem (i.e., coil or spark plug) affecting one cylinder
 

Trouble Code: P0302

Cylinder 2 Misfire Detected

Trouble Code Conditions: DTC P0107, P0108, P0131, P0132, P0171, P0172, P1128, P0335, P0336, P0505, P1128, P1129, P1259, P1361, P1362, P1366, P1367 and P1519 not set, engine running under positive torque conditions, and the PCM detected a misfire condition in one cylinder. Note: If the misfire is severe, the MIL will flash on/off on the 1st trip!

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine (mechanical) problem affecting only one cylinder
 
Fuel system problem affecting only one cylinder
 
Ignition problem (i.e., coil or spark plug) affecting one cylinder
 

Trouble Code: P0303

Cylinder 3 Misfire Detected

Trouble Code Conditions: DTC P0107, P0108, P0131, P0132, P0171, P0172, P1128, P0335, P0336, P0505, P1128, P1129, P1259, P1361, P1362, P1366, P1367 and P1519 not set, engine running under positive torque conditions, and the PCM detected a misfire condition in one cylinder. Note: If the misfire is severe, the MIL will flash on/off on the 1st trip!

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine (mechanical) problem affecting only one cylinder
 
Fuel system problem affecting only one cylinder
 
Ignition problem (i.e., coil or spark plug) affecting one cylinder
 

Trouble Code: P0304

Cylinder 4 Misfire Detected

Trouble Code Conditions: DTC P0107, P0108, P0131, P0132, P0171, P0172, P1128, P0335, P0336, P0505, P1128, P1129, P1259, P1361, P1362, P1366, P1367 and P1519 not set, engine running under positive torque conditions, and the PCM detected a misfire condition in one cylinder. Note: If the misfire is severe, the MIL will flash on/off on the 1st trip!

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine (mechanical) problem affecting only one cylinder
 
Fuel system problem affecting only one cylinder
 
Ignition problem (i.e., coil or spark plug) affecting one cylinder
 

Trouble Code: P0325

Knock Sensor 1 Circuit Malfunction

Trouble Code Conditions: Engine started, engine running for 1 minute, and the PCM detected an unexpected voltage condition on the Bank 1 Knock sensor circuit.

Possible Causes:



Knock sensor signal circuit is open (rear bank of engine)
 
Knock sensor signal circuit is grounded (rear bank of engine)
 
Knock sensor not tightened properly
 
Knock sensor damaged or has failed (it may be open internally)
 
PCM has failed
 

Trouble Code: P0335

CKP Sensor 1 Circuit Malfunction (No Signal)

Trouble Code Conditions: Engine cranking or running; and the PCM did not detect any signals from the Crankshaft Position (CKP) Sensor 1 during the test. Note: The engine will crank for a longer period of time, may buck or jerk, but it will start and run without the CKP sensor signal present.

Possible Causes:



CKP1 sensor signal circuit is open
 
CKP1 sensor is shorted to ground
 
CKP1 sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0336

CKP Sensor 1 Circuit Intermittent Signal

Trouble Code Conditions: Engine started, and the PCM detected the CKP Sensor 1 signal was interrupted during the CCM test. Note: This trouble code is usually caused by an intermittent fault.

Possible Causes:



CKP1 sensor signal circuit is open (intermittent)
 
CKP1 sensor is shorted to ground (intermittent)
 
CKP1 sensor is damaged or has failed (intermittent fault)
 
PCM has failed
 

Trouble Code: P0420

Catalyst Efficiency Below Thresholds (Bank 1)

Trouble Code Conditions: DTC P0137, P0138 and P0141 not set, engine running in closed loop at 40-55 mph for 2 minutes, followed by a deceleration period to 35 mph at closed throttle, and the PCM detected excessive activity in the Catalyst oxygen sensor (Bank 1) in the Catalyst Monitor test.

Possible Causes:



Air leaks in at the exhaust manifold or exhaust pipes
 
Catalytic converter damaged or has failed (deteriorated)
 
Front HO2S is more aged than the rear HO2S (HO2S is lazy)
 
PCM has failed
 

Trouble Code: P0451

Fuel Tank Pressure Sensor Circuit Range/Performance

Trouble Code Conditions: Engine started, and the PCM detected the fuel tank pressure (FTP) sensor signal was less than the allowable range stored in the PCM memory (i.e., a calibrated range adjusted to current conditions). Note: The FTP sensor PID should be near 2.5v with the fuel cap off.

Possible Causes:



FTP sensor vacuum lines loose, damaged or disconnected
 
Fuel tank pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0452

Fuel Tank Pressure Sensor Circuit Low Input

Trouble Code Conditions: Key on or engine running; and the PCM detected the fuel tank pressure (FTP) sensor signal was less than 0.16v during the test. Note: The FTP sensor PID should be near 2.5v with the fuel cap off.

Possible Causes:



FTP sensor signal circuit is shorted to ground
 
FTP sensor vacuum lines loose, damaged or disconnected
 
Fuel tank pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0453

Fuel Tank Pressure Sensor Circuit Low Input

Trouble Code Conditions: Key on or engine running; and the PCM detected the fuel tank pressure (FTP) sensor signal was less than 0.16v during the test. Note: The FTP sensor PID should be near 2.5v with the fuel cap off.

Possible Causes:



FTP sensor signal circuit is shorted to ground
 
FTP sensor vacuum lines loose, damaged or disconnected
 
Fuel tank pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0500

Vehicle Speed Sensor Circuit Low Input

Trouble Code Conditions: Engine started, then accelerated to 4000 rpm in 2nd gear, followed by a deceleration period to 1500 rpm with the throttle closed, and the PCM did not detect any VSS signals during the CCM test. Note: The VSS signal should pulse from 0-5v as the vehicle moves.

Possible Causes:



VSS signal circuit is open or shorted to ground
 
VSS signal circuit is shorted to VREF or system power (B+)
 
VSS is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0505

Idle Speed Control System

Trouble Code Conditions: DTC P1519 not set, engine started, engine running at hot idle, and the PCM detected the Actual idle speed and the Target idle speed were too far apart during the CCM Rationality test.

Possible Causes:



IAC valve circuit open, shorted to ground or to power (B+)
 
IAC valve is damaged or has failed
 
Fast idle thermo valve is damaged or has failed (some models)
 
Throttle body is dirty or full of sludge (clean and then retest)
 
PCM has failed
 
TSB 03-006 (3/17/03) contains a repair procedure for this code
 

Trouble Code: P1121

TP Sensor Signal Lower Than Expected

Trouble Code Conditions: Engine started, and the PCM detected the TP sensor was lower than the expected value with the throttle wide open (i.e., the Scan Tool reads less than 14.1% under these conditions) during the CCM Test.

Possible Causes:



TP sensor signal circuit is shorted to ground between the PCM and the TCM
 
TP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1122

TP Sensor Signal Higher Than Expected

Trouble Code Conditions: Engine started, and the PCM detected the TP sensor was more than the expected value with the throttle wide open (i.e., the Scan Tool reads more than 16.5% under these conditions) during the CCM Rationality test.

Possible Causes:



TP sensor signal circuit is open or shorted to VREF between the PCM and the TCM
 
TP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1128

MAP Sensor Signal Lower Than Expected

Trouble Code Conditions: Engine started, engine running at cruise speed and then back to idle speed, and the PCM detected a MAP sensor signal was less than the expected value during the CCM Rationality Test.

Possible Causes:



MAP sensor signal circuit shorted to ground (intermittent fault)
 
MAP sensor vacuum line bent or plugged at intake manifold
 
MAP sensor is damaged or it is out-of-calibration
 
PCM has failed
 

Trouble Code: P1129

MAP Sensor Value Higher Than Expected

Trouble Code Conditions: Engine started, engine running at cruise speed and then back to idle speed, and the PCM detected a MAP sensor signal was higher than the expected value during the CCM Rationality Test.

Possible Causes:



Check for signs of a vacuum leak at the PCV valve or hose, the engine mount vacuum hose, brake booster and throttle body
 
MAP sensor signal circuit shorted to VREF (intermittent fault)
 
MAP sensor is damaged or it is out-of-calibration
 
PCM has failed
 

Trouble Code: P1259

VTEC System Malfunction

Trouble Code Conditions: Engine running under hard acceleration, than back to road load, and the PCM detected a fault in the operation of the VTEC system.

Possible Causes:



VTEC solenoid control circuit is open or shorted to ground
 
VTEC solenoid is damaged or has failed
 
VTEC pressure switch circuit is open or shorted to ground
 
VTEC pressure switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1336

Crankshaft Speed Fluctuation Sensor Circuit Malfunction

Trouble Code Conditions: Engine started, and PCM detected an unexpected (intermittent) interruption of the crankshaft speed fluctuation (CSF) sensor signal.

Possible Causes:



CSF signal circuit is open or shorted to ground
 
CSF signal circuit is shorted to VREF or system power (B+)
 
CSF is damaged or has failed
 
CSF pickup assembly or its pulse rotor is damaged
 
PCM has failed
 

 
label.common.footer.alt.autozoneLogo