I'm getting multiple fault codes from an 89 topaz (2.3 with airconditioning) Here are the codes:
13 RPM idle out of range/low: cant control idle vachum leak,TB base idle off,idle air valve dirty or bad, EGR stuck open idle out of spec same as code 1231 EVP or PFE circuit below minimum voltage Bad EVP/PFE sensor, no exhaust backpressure (really doesn't really cause problems) or inopperative EGR
42 HEGO (HO2S) sendor voltage high / system rich Bad O2, bad MAP sensor, Bad fuel regulator, Leaking injectors, restriction in fuel return line, clogged exhaust lowering vachum70 ECM failure Data communication link error, bad ECM
73 Insuficiant throttle position change No change in TPS signal, no dynamic response sets this.95 Fuel pump secondary circuit fault Fuel pump monitor has seen a fault in the fuel pumps or circuit
I'm wondering if I really have all these problems or if I just have three problems. Assuming I don't have a vacuum leak somewhere (I'll test that) I'm wondering if a bad MAP or O2 sensor could cause the ECM code?
Could anything other than a problem with the fuel pump cause the code 95?
How do you test an EGR valve?
And what exactly is a EVP or PFE sensor? I can't find a definition anywhere.
Thanks in advance.
Paul.