{| ! colspan="2" | | 13 Oxygen sensor voltage stays between 0.35 and 0.55 volts for 60 seconds. Engine was at normal operating temperature and had been running for at least 2 minutes after start with a throttle angle above 5%. 14 Coolant temperature sensor signal indicates a temperature of over 275� F for 2 seconds. 15 Coolant temperature sensor signal indicates a temperature colder than -27� F for 30 seconds after the engine has been running for at least 30 seconds. 21 TPS voltage was above 2.5 volts for 8 seconds when the MAP sensor signal showed manifold vacuum to be 15 pounds or more. 22TPS voltage was under 0.2 volts for 2 seconds when the engine was running. 23 Inlet air temperature sensor signal showed an air temperature below -22� F after the engine has been running for 5 minutes. 24 When engine speed was between 1200 and 4400 RPM and throttle position angle was less than 2%, the MAP signal showed low voltage (high manifold vacuum) for at least 5 seconds. 25 Inlet air temperature sensor signal showed an air temperature over 302� F after the engine has been running for 5 minutes. 32 EGR open command did not change MAP sensor signal. Normal EGR flow should cause slight decrease in manifold vacuum which would change MAP sensor signal. 33 MAP sensor signal voltage was too high (low vacuum) for 5 seconds when throttle opening was under 4%. 34 MAP sensor signal voltage was too low (high vacuum) when engine speed was under 1200 RPM or the engine speed was over 1200 RPM with a throttle position angle above 21%. 42 The EST signal did not change when the ECM applied bypass voltage to the ignition module. 43 The ECM did not detect a knock signal during near wide open throttle operation with coolant temperature above 194� F or the knock signal was present for 5 seconds or more during normal engine operation. 44 Oxygen sensor voltage was under 0.2 volts for 50 seconds of closed loop operation. 45 Oxygen sensor voltage was over 0.7 volts for 30 seconds of closed loop operation with a throttle angle between 2% and 20%. 51 PROM error. 52 CALPAK error. 54 Fuel pump voltage was not present at fuel pump sense line for 2 seconds after the ECM has sent the fuel pump on command. 55 ECM error. Replace ECM. |}
There are dozens of codes. Be specific as to what code you are getting.
The check engine light comes on at start up for a bulb check. If it stays on with the engine running the computer has detected a malfunction. You need to have it checked for codes.
Have vehicle scanned to determine the problem and have codes cleared
See link below.
You have it checked for codes and diagnose the cause of the code.
A flashing check engine light usually indicates a misfire. You need to check codes to know possible causes.
It takes a scanner to read the codes.
The check engine light sets a code for diagnostics and you need a code reader. Most auto parts stores sell code readers and most will check the codes for free.
You can buy the check engine computer and the book comes with it. I know, I bought one. When your check engine light comes on, you plug it in and check the engine and it will give you the code and you look in the book for that code and it gives you the answer.
The light could come on for a number of reasons. The vehivle would have to be hooked up to a scanner to determine the engine code or codes. After you determine the codes you can isolate and fix the probelem. If the check engine light is on there will be a computer code that will appear on the scanner.
The engine coolant temp sensor can do that. If you have a check engine light on, have the codes read.
Auto Zone will check your engine light codes for FREE...